E.F. Johnson Company 761X, 764X Service Manual

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Service Manual

VHF 146-174 MHz

761x (VHF) 764x (UHF) Conventional Mobile

UHF 400-430, 450-47 0, 470-490, 490-512 MHz

45 Watts Part No. 242-7610-0xx

35 Watts Part No. 242-7640-0xx

First Printing November 1998

761x (VHF) 764x (UHF)

CONVENTIONAL

FM TWO-WAY RADIO

VHF 146-174 MHz

45 Watts

UHF 400-430, 450-470, 470-490, or 490-512 MHz

35 Watts

and systems, and information security. EFJohnson land mobile radios and systems provides wireless communication for a variety of markets including government, public safety, and commercial users. Transcrypt’s information security devices utilize sophisticated scrambling and encryption techniques to protect sensitive voice and data transmissions.

Viking Head/EFJohnson logo and Call Guard® are registered trademarks of Transcrypt International Incorporated. Smartrunk II™ is a trademark of Smartrunk Systems Inc. All other company and/or product names used in this manual are trademarks and/or registered trademarks of their respective manufacturer.

Information in this manual is subject to change without notice.

TA BLE OF CONTENTS

1 GENERAL INFORMATION

1.1 SCOPE OF MANUAL

1.2 TRANSCEIVER DESCRIPTION

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.3 PRODUCT WARRANTY

1.4 PART NUMBER BREAKDOWN

1.5 TRANSCEIVER IDENTIFICATION

1.6 ACCESSORIES

1.7 FACTORY CUSTOMER SERVICE

1.8 FACTORY RETURNS

1.9 REPLACEMENT PARTS

1.10 INTERNET HOME PAGE

. . . . . . . . . . . . . . . . . . . .1-1

. . . . . . . . . . .1-1

. . . . . . . . . . . . . . . . .1-1

. . . . . . . . . . .1-1

. . . . . . . . .1-1

. . . . . . . . . . . . . . . . . . . . . . . . .1-1

. . . . . . . . .1-1

. . . . . . . . . . . . . . . . . . . .1-2

. . . . . . . . . . . . . . . . .1-3

2 INSTALLATION AND DISASSEMBLY

2.1 GENERAL

Scope of Instructions. . . . . . . . . . . . . . . . . . . . . . 2-1

Performance Tests. . . . . . . . . . . . . . . . . . . . . . . . 2-1

Transceiver Programming. . . . . . . . . . . . . . . . . . 2-1

Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2 TRANSCEIVER INSTALLATION

Selecting Mounting Location . . . . . . . . . . . . . . . 2-1

Installing Mounting Bracket . . . . . . . . . . . . . . . . 2-2

Installing Microphone Hanger . . . . . . . . . . . . . . 2-2

2.3 POWER CABLE INSTALLATION

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Cable Installation . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Power Cable Fuses . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.4 USING AN EXTERNAL SPEAKER

2.5 ACCESSORY CABLE INSTALLATION

2.6 TRANSCEIVER DISASSEMBLY

2.7 2-TONE/5-TONE MODULE INSTALLATION

Installation Procedure . . . . . . . . . . . . . . . . . . . . . 2-5

2-Tone Programming . . . . . . . . . . . . . . . . . . . . . 2-5

5-Tone Programming . . . . . . . . . . . . . . . . . . . . . 2-5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

. . . . . . . . . .2-1

. . . . . . . . .2-2

. . . . . . . .2-3

. . . .2-3

. . . . . . . . . .2-4

. . . . . . . . . . . . . . . . . . . . . . .2-5

Adjusting Squelch Level. . . . . . . . . . . . . . . . . . . 3-3

Bank Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Automatic Scan Enable. . . . . . . . . . . . . . . . . . . . 3-4

Backlight On-Off. . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Beep On-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.4 RECEIVING AND PLACING CALLS

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Receiving a Call . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Placing a Call . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Monitoring Before Transmitting. . . . . . . . . . . . . 3-4

Time-Out Timer . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.5 PROGRAMMABLE FUNCTIONS

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Backlight On-Off. . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Bank Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Beep On-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Call Guard Tone Select. . . . . . . . . . . . . . . . . . . . 3-6

Channel Select. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

DTMF Number Select. . . . . . . . . . . . . . . . . . . . . 3-6

Emergency Key. . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Lock Key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Monitor Mode Select. . . . . . . . . . . . . . . . . . . . . . 3-6

Output Power Select . . . . . . . . . . . . . . . . . . . . . . 3-6

Priority Channel Select . . . . . . . . . . . . . . . . . . . . 3-6

Receive Attenuate . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Scan Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Scan List Programming. . . . . . . . . . . . . . . . . . . . 3-7

Talk-Around Select. . . . . . . . . . . . . . . . . . . . . . . 3-7

2-Tone Calling Features . . . . . . . . . . . . . . . . . . . 3-7

5-Tone Calling Features . . . . . . . . . . . . . . . . . . . 3-7

Wide/Narrow Band Select. . . . . . . . . . . . . . . . . . 3-7

3.6 CHANNEL SCAN

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Scan Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Priority Channel Sampling . . . . . . . . . . . . . . . . . 3-8

. . . . . . . . . . . . . . . . . . . . . . . 3-7

. . . . . . . . . 3-5

4 PROGRAMMING

. . . . . . 3-4

3 OPERATION

3.1 FEATURES

3.2 CONTROLS AND DISPLAY

Front Panel Controls. . . . . . . . . . . . . . . . . . . . . . 3-2

Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.3 BASIC OPERATION

Turning Power On and Off. . . . . . . . . . . . . . . . . 3-2

Entering a Password . . . . . . . . . . . . . . . . . . . . . . 3-3

Volume Level Adjustment . . . . . . . . . . . . . . . . . 3-3

Power-On Menu . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Channel Selection . . . . . . . . . . . . . . . . . . . . . . . . 3-3

November 1998 Part No. 001-7600-001

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

. . . . . . . . . . . . . .3-2

. . . . . . . . . . . . . . . . . . . . .3-2

4.1 GENERAL

Programming Setup. . . . . . . . . . . . . . . . . . . . . . . 4-1

Programming Cables. . . . . . . . . . . . . . . . . . . . . . 4-1

Programming Software . . . . . . . . . . . . . . . . . . . . 4-1

4.2 STARTING THE PROGRAM

4.3 SPECIAL KEYS AND FUNCTIONS

4.4 MENU FLOW

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

File Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Screen Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Program Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Print Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Model Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Setup menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

. . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

. . . . . . . . . . . . . 4-2

. . . . . . . 4-2

TABLE OF CONTENTS (CONT’D)

4.5 UNIQUE PMR (EUROPEAN) SCREENS

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

Unique PMR Screens . . . . . . . . . . . . . . . . . . . . 4-15

4.6 CLONING (PROGRAMMING ONE

TRANSCEIVER WITH ANOTHER)

. .4-15

. . . . .4-16

5A VHF (7610) CIRCUIT DESCRIPTION

5.1 VHF RECEIVER CIRCUIT

Antenna Switching Circuit. . . . . . . . . . . . . . . . . 5-1

RF Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

First Mixer And First IF Circuits . . . . . . . . . . . . 5-1

Second IF and Demodulator Circuits. . . . . . . . . 5-1

Audio Amplifier Circuit. . . . . . . . . . . . . . . . . . . 5-2

Receiver Mute Circuit . . . . . . . . . . . . . . . . . . . . 5-2

5.2 VHF TRANSMITTER CIRCUIT

Microphone Amplifier Circuit . . . . . . . . . . . . . . 5-3

Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . 5-3

Transmit Driver Circuit . . . . . . . . . . . . . . . . . . . 5-3

Power Amplifier Module . . . . . . . . . . . . . . . . . . 5-3

APC Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

5.3 VHF PLL CIRCUIT

PLL Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

VCO Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

5.4 VHF IC PIN DESCRIPTIONS

VHF Power Supply. . . . . . . . . . . . . . . . . . . . . . . 5-5

VHF CPU IC1 Port Allocation. . . . . . . . . . . . . . 5-5

VHF I/O Expander IC5 (Main Unit) . . . . . . . . . 5-6

VHF Port Expander IC11 (Main Unit). . . . . . . . 5-6

. . . . . . . . . . . . . . . . . . . . . .5-4

. . . . . . . . . . . . . . . .5-1

. . . . . . . . . . . .5-3

. . . . . . . . . . . . .5-5

5B UHF (7640) CIRCUIT DESCRIPTION

5.5 UHF RECEIVER CIRCUIT

Antenna Switching Circuit. . . . . . . . . . . . . . . . . 5-7

RF Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

First Mixer And First IF Circuits . . . . . . . . . . . . 5-7

Second IF and Demodulator Circuits. . . . . . . . . 5-7

Audio Amplifier Circuit. . . . . . . . . . . . . . . . . . . 5-8

Receiver Mute Circuit . . . . . . . . . . . . . . . . . . . . 5-8

5.6 UHF TRANSMITTER CIRCUIT

Microphone Amplifier Circuit . . . . . . . . . . . . . . 5-9

Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . 5-9

Transmit Driver Circuit . . . . . . . . . . . . . . . . . . . 5-9

Power Amplifier Module . . . . . . . . . . . . . . . . . . 5-9

APC Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

5.7 UHF PLL CIRCUIT

PLL Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

VCO Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

UHF Power Supply. . . . . . . . . . . . . . . . . . . . . . 5-11

UHF CPU IC1 Port Allocation. . . . . . . . . . . . . 5-11

UHF I/O Expander IC12 (Main Unit) . . . . . . . 5-12

UHF Port Expander IC13 (Main Unit). . . . . . . 5-12

. . . . . . . . . . . . . . . . . . . . .5-10

. . . . . . . . . . . . . . . .5-7

. . . . . . . . . . . .5-9

6 ADJUSTMENT PROCEDURE

6.1 GENERAL

Suggested Test Equipment . . . . . . . . . . . . . . . . . 6-1

Test Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Test Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Computer-Aided Tuning. . . . . . . . . . . . . . . . . . . 6-3

Reprogramming if EEPROM is Replaced or

Error Occurs . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

6.2 PRELIMINARY SETUP

6.3 PLL ADJUSTMENT (VHF MODELS)

6.4 TRANSMITTER ADJUSTMENTS (VHF MODELS)

Reference Frequency . . . . . . . . . . . . . . . . . . . . . 6-4

Output Power Adjust. . . . . . . . . . . . . . . . . . . . . . 6-5

FM Deviation Adjust . . . . . . . . . . . . . . . . . . . . . 6-5

DTCS Waveform Adjust. . . . . . . . . . . . . . . . . . . 6-6

6.5 RECEIVER ADJUSTMENTS (VHF MODELS)

Bandpass Filter Adjust . . . . . . . . . . . . . . . . . . . . 6-6

Squelch Adjust . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Beep Tone Level. . . . . . . . . . . . . . . . . . . . . . . . . 6-7

6.6 PLL ADJUSTMENT (UHF MODELS)

6.7 TRANSMITTER ADJUSTMENTS (UHF MODELS)

Reference Frequency . . . . . . . . . . . . . . . . . . . . . 6-8

Output Power Adjust. . . . . . . . . . . . . . . . . . . . . . 6-8

FM Deviation Adjust . . . . . . . . . . . . . . . . . . . . . 6-8

DTCS Waveform Adjust. . . . . . . . . . . . . . . . . . . 6-9

6.8 RECEIVER ADJUSTMENTS (UHF MODELS)

Bandpass Filter Adjust . . . . . . . . . . . . . . . . . . . 6-10

Squelch Adjust . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

Beep Tone Level. . . . . . . . . . . . . . . . . . . . . . . . 6-10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

. . . . . . . . . . . . . . . . . . .6-4

. . . . . . . . . . . . . . . . . . . . . . . .6-4

. . . . . . . . . . . . . . . . . . . . . . .6-6

. . . . . . . . . . . . . . . . . . . . . . . .6-8

. . . . . . . . . . . . . . . . . . . . . . .6 -10

7 PARTS LIST

VHF (761x) Models

Main Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1

Front Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18

Chassis Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20

Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . .7-21

UHF (764x) Models

Main Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8

Front Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18

Chassis Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20

Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . .7-22

. . . . . . .6-4

. . . . . .6-8

November 1998

iii

Part No. 001-7600-001

TABLE OF CONTENTS (CONT’D)

8 SCHEMATIC DIAGRAMS AND

COMPONENT LAYOUTS

VHF (761x) Models

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1

Transistor and Diode Basing. . . . . . . . . . . . . . . . .8-2

Main Unit Board Bottom View. . . . . . . . . . . . . . .8-3

Main Unit Board, Top View. . . . . . . . . . . . . . . . .8-4

Main Unit Schematic . . . . . . . . . . . . . . . . . . . . . .8-5

Front Unit PC Board. . . . . . . . . . . . . . . . . . . . . .8-10

Front Unit Schematic . . . . . . . . . . . . . . . . . . . . .8-11

UHF (764x) Models

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .8-6

Transistor and Diode Basing. . . . . . . . . . . . . . . .8-12

Main Unit Board Bottom View. . . . . . . . . . . . . . .8-7

Main Unit Board, Top View. . . . . . . . . . . . . . . . .8-8

Main Unit Schematic . . . . . . . . . . . . . . . . . . . . . .8-9

Front Unit PC Board. . . . . . . . . . . . . . . . . . . . . .8-10

Front Unit Schematic . . . . . . . . . . . . . . . . . . . . .8-11

LIST OF TABLES

LIST OF FIGURES

2-1 Installation Components . . . . . . . . . . . . . . . . . . 2-1

2-2 Mounting Bracket Installation. . . . . . . . . . . . . . 2-2

2-3 Accessory Cable Installation. . . . . . . . . . . . . . . 2-3

2-4 Cover and Front Panel Removal . . . . . . . . . . . . 2-4

2-5 PC Board Screws. . . . . . . . . . . . . . . . . . . . . . . . 2-4

2-6 Removing PC Board . . . . . . . . . . . . . . . . . . . . . 2-4

2-7 2/5-Tone Module Installation . . . . . . . . . . . . . . 2-5

3-1 7600 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . 3-1

4-1 Programming Setup. . . . . . . . . . . . . . . . . . . . . . 4-1

4-2 Memory Channel Screen (PMR Models) . . . . 4-17

5-1 Second IF System IC3 (VHF). . . . . . . . . . . . . . 5-2

5-2 Audio Switching and Amplifier Circuit (VHF) 5-2

5-3 PLL Circuit (VHF) . . . . . . . . . . . . . . . . . . . . . . 5-4

5-4 Second IF System IC1 (UHF). . . . . . . . . . . . . . 5-8

5-5 Audio Switching and Amplifier Circuit (UHF) 5-8

5-6 PLL Circuit (UHF) . . . . . . . . . . . . . . . . . . . . . 5-10

6-1 Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6-2 Screen Display Example . . . . . . . . . . . . . . . . . . 6-2

6-3 Test Cable Schematic . . . . . . . . . . . . . . . . . . . . 6-2

6-4 VHF Adjustment Points . . . . . . . . . . . . . . . . . . 6-5

6-5 Beep Tone Level Adjustment . . . . . . . . . . . . . . 6-7

6-6 UHF Adjustment Points . . . . . . . . . . . . . . . . . . 6-9

1-1 75xx Accessories . . . . . . . . . . . . . . . . . . . . . . . .1-2

3-1 Option Key Programmable Functions . . . . . . . .3-5

4-1 Memory Channel Screen Description

(LMR Models) . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

4-2 Key and Display Assign Screen Description . . .4-7

4-3 DTMF Autodial Screen Description . . . . . . . . . .4-9

4-4 Continuous Tone Screen Description . . . . . . . .4-10

4-5 Scan Function Screen Description . . . . . . . . . .4-10

4-6 2-Tone Code Channel Screen Description . . . .4-11

4-7 Common Screen Description . . . . . . . . . . . . . .4-13

4-8 Expert Screen Description . . . . . . . . . . . . . . . .4-14

6-1 VHF Test Frequencies . . . . . . . . . . . . . . . . . . . . .6-3

6-2 UHF Test Frequencies . . . . . . . . . . . . . . . . . . . . .6-3

November 1998 Part No. 001-7600-001

SECTION 1 GENERAL INFORMATION

242 - 7 6 x x - 0 x x

Band

Config.

Freq Range

0 = Half duplex, dual

IF, high power

1 = VHF 4 = UHF

0 = Full band 1 = 400-430 (UHF) 3 = 146-174 (VHF) 450-470 (UHF) 4 = 470-490 (UHF) 5 = 488-512 (UHF)

2 = Std mic

3 =

With DTMF

mic

7 = w/o mic

NOTE: Not all configurations are available.

Type

Signaling

0 = Conventional only

76xx 0 A 23 8 J 12345

Model Revision

Letter

Manufacture

Date

Warranty

Number

Week No.

of Year

Last Digit of Year

J = Japan

8th Digit

of P.N.

PlantFrom P.N.

GENERAL INFORMATION

1.1 SCOPE OF MANUAL

This service manual contains operation, installation, programming, alignment, and service information for the EFJohnson® 7610 and 7640 mobile transceivers.

1.2 TRANSCEIVER DESCRIPTION

1.2.1 GENERAL

The 7600-series mobile transceivers operate on conventional (non-trunked) channels. The 7610 operates in the VHF fr equency range of 146- 174 MHz , an d the 7640 operates in the UHF frequency range of 400-430, 450-470, 470-490, or 488-512 MHz. Up to 32 channels can be programmed. Power output is user selectable or fixed for the following lev els. Refer to Section 3.1 for more info rmation on features.

Model High Low 1 Low 2

7610 (VHF) 45W 25W 4.5W 7640 (UHF) 35W 20W 3.5W

These transceivers are digitally synthesized and microprocessor controlled. Transceiver programming is performed using a PC-compatible computer, a special EFJohnson programming cable, and programming software (see Table 1-1). The alignment procedure is performed using this same hardware setup, a fabricated test cable, and special Adjust software included with the programming software (see Section 4).

1.4 PART NUMBER BREAKDOWN

The following is a breakdown of the part number

used to identify this transceiver.

1.5 TRANSCEIVER IDENTIFICATION

The transceiver identification number is printed on a label that is attached to the chassis. The following information is contained in the identification number:

1.3 PRODUCT WARRANTY

The warranty statement for this transceiver is available from your product supplier or from the Warranty Department, EFJohnson, 299 Johnson Avenue, P.O. Box 1249, Waseca, MN 56093-0514. This information may also be requested from the Warranty Department by phone as described in Section 1.7. The Warranty Department may also be contacted for Warranty Service Reports, claim forms, or any other questions conc erning warranties or warranty service.

1.6 ACCESSORIES

The accessories availab le for this transceiver are

listed in Table 1-1.

1.7 FACTORY CUSTOMER SERVICE

The Customer Service Department of EFJohnson provides customer assistance on technical problems and the availability of local and factory repair facilities. Regular Customer Service hours are 7:30 AM. -

November 1998

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Part No. 001-7600-001

GENERAL INFORMATION

5:30 PM. Central Time, Monday - Friday. The Customer Service Department can be reached using one of the following telephone numbers:

Toll-Free: (800) 328-3911

(From within continental United States only)

International: (507) 835-6911

FAX: (507) 835-6969

E-Mail: First Initial/Last Name@efjohnson.co m

(You need to know the name of the person you want to reach. Example: jsmith@efjohnson.com)

NOTE: Emergency 24-hour technical support is also available at the 800 and preceding numbers during off hours, holidays, and weekends.

When your call is answered at EFJohnson, you will hear a brief mess age informing you of numbers that can be entered to reach various departments. This number may be entered during or after the message using a tone-type telephone. If you have a pulse-type telephone, wait until the message is finished and an operator will come on the line to assist you. When you enter some numbers, another number is requested to further categorize the type of information you need.

You ma y also contac t the Customer Service Department by mail. Please include all information that may be helpful in sol vi ng your problem. The mailing address is as follows:

EFJohnson

Customer Service Department

299 Johnson Avenue

P.O. Box 1249

Waseca, MN 56093-0514

1.8 FACTORY RETURNS

Repair service is normal ly availa ble through local authorized EFJohnson Land Mobile Radio Service Centers. If local service is not ava ilable, the equipmen t can be returned to the fac tory for repair. However, it is recommended that you contact the Customer Service Department before returning equipm ent because a service representative may be able to suggest a solution

Table 1-1 75xx Accessories

Accessory Part No.

Mounting bracket 585-7600-040 DC cable assembly 585-7600-029 Mounting screws and fuses 585-7600-041 Microphone hanger 023-3514-001 Mic hanger ground wire 023-7171-911 Function name stickers 585-7600-042

Microphone, standard 585-7600-020 Microphone, DTMF 585-760 0-0 22

2-Tone/5-tone module kit 585-7600-026 5”, 4.7-ohm, 15W external speaker 250-0151-010 Compact speaker 585-7600-023 Accessory/data cable (DB-9 connector) 585-7600-027

Programming Accessories

Programming software, 3-1/2 disk 585-7600-030 Programming cable, computer-adapter 585-7500-031 Adapter cable, prog cable-xcvr 585-7600-031 Replication (cloning) cable 597-2002-200 DB-9 M to DB-25 F adapter 515-9000-015

to the problem so that return of the equipment would not be necessary.

Be sure to fill out a Factory Repai r Request Form #271 for each unit to be repaired, whether it is in or out of warranty. These forms are avai lable free of charge by calling Customer Service (see Section 1.7) or by requesting them when you send a unit in for repair. Clearly describe the difficulty experienced in the space provided and also note any prior physical damage to the equipment. Then include a form in the shipping container with each unit. Your telephone number and contact name are important because there are times when the technicians have specific questions that need to be answered in order to completely identify and repair a problem.

When returning equipment for repair, it is also a good idea to use a PO number or some othe r reference number on your paperwork in case you need to call the repair lab about your unit. These numbers are referenced on the repair order and it makes it easier and faster to locate your unit in the lab.

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1-2

GENERAL INFORMATION

Return Authorization (RA) numbers are not necessary unless you have been given one by the Field Service Department. RA numbers are required for exchange units or if the Field Service Department wants to be aware of a specific problem. If you have been given an RA number, reference this number on the Factory Repair Request Form sent with the unit. The repair lab will then contact the Field Service Department when the unit arrives.

1.9 REPLACEMENT PARTS

Replacement parts can be ordered directly from the Service Parts Departmen t. To order parts by phone, dial the toll-free number as described in Section 1.7. When ordering, please supply the part number and quantity of each part ordered. EFJohnson dealers also need t o g ive t heir a ccount number. If there is uncertainty a bout t he part number, include the desig-

nator (C512, for example) and the model number of the equipment the part is from.

You may also send your order by mail or FAX. The mailing address i s as follows and the FAX number is shown in Section 1.7.

EFJohnson

Service Parts Department

299 Johnson Avenue

P.O. Box 1249

Waseca, MN 56093-0514

1.10 INTERNET HOME PAGE

EFJohnson has a si te on the World Wide Web that can be accessed for information on the company and such things as products, systems, and regulations. The address is h ttp://www.efjohnson.com.

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GENERAL INFORMATION

7610 (VHF) AND 7640 (UHF) MOBILE SPECIFICATIONS

The following are general specifications intended for use in testing and servicing this transceiver. For current advertised specifications, refer to the specification sheet available from your sales representative. Values are typical and are subject to change without notice.

GENERAL

Frequency Range VHF: 146-174 MHz

UHF: 400-430 MHz, 450-470 MHz, 470-490 MHz, or 488-512 MHz (some

performance degradation from 488-490 MHz with 488-512 MHz models) Operating Modes Conventional (non-trunked), Tone and digital Call Guard® squelch Channels 32 maximum (2 banks x 16 channels available) Transmit/Receive Separation Any frequency within the range Channel Spacing (dual IF Models) VHF - 12.5 kHz (narrow band) and 30 kHz (wideband)

UHF - 12.5 kHz (narrow band) and 25 kHz (wideband) Maximum Deviation 12.5/15 kHz channel spacing - 2.5 kHz maximum

25 kHz channel spacing - 5.0 kHz maximum Frequency Stability 5.0 PPM (VHF), 2.5 PPM (UHF) from –22° to +140° F (–30° to +60° C) Dimensions (w/o controls) 1.6” H x 5.5” W x 6.7” D (4.1 cm x 13.9 cm x 17.0 cm) Weight 2 lb. 11 oz. (1.22 kg) Supply Voltage 13.6 volts DC nominal (12-volt, negative ground vehicle electrical system) Current Drain (maximum) Standby - 200 mA standby

Receive (rated audio out) - 700 mA

Medium Tx Power - 6.0 A (VHF), 7.0 A (UHF)

High Tx Power - 15 A max/10 A typ (VHF), 11 A max/8 A typ (UHF) FCC Compliance Parts 15 and 90

RECEIVER

Sensitivity (12 dB SINAD) 0.25 µV Selectivity 70 dB at 25 kHz, 60 dB at 12.5 kHz Spurious and Image Rejection 70 dB Intermodulation 65 dB Hum and Noise 46 dB at 25 kHz, 40 dB at 12.5 kHz Maximum Frequency Spread Any spread within the range Audio Power Output 3.5 W into 4-ohm load Audio Distortion Less than 10% at 1 kHz with 60% deviation Audio Response +2, –8 dB at 6 dB per octave de-emphasis RF Input Impedance 50 ohms

TRANSMITTER

RF Power Output VHF: 45W (high), 25W (low 1), 4.5W (low 2)

UHF: 35W (high), 20W (low 1), 3.5W (low 2) Spurious and Harmonic Emissions 70 dB FM Hum and Noise 46 dB at 25 kHz, 40 dB at 12.5 kHz Audio Modulation 12.5 kHz - 11K0F3E, 25 kHz - 16K0F3E Audio Distortion Less than 5% at 1 kHz with 40% modulation Audio Frequency Response +2, –8 dB at 6 dB per octave pre-emphasis Maximum Frequency Spread Any spread within the band RF Output Impedance 50 ohms Duty Cycle 20% TIA

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Part No. 001-7600-001

GENERAL INFORMATION

NOTES

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1-6

SECTION 2 INSTALLATION AND DISASSEMBLY

Optional Accessory Cable

P.N. 585-7600-027

DB-9 Female

INSTALLATION AND DISASSEMBLY

External Spkr Jack

UHF-Type Ant Jack

10-Ft. Power Cable

Optional External Speaker

P.N. 250-0151-010

Figure 2-1 Installation Components

2.1 GENERAL

2.1.1 SCOPE OF INSTRUCTIONS

Since each installation is somewhat unique, the following install at ion instructions are intended only as a general guide to installing this transceiver.

2.1.2 PERFORMANCE TESTS

Although each transceiver is carefully tested at the factory before shipment, it is good practice to verify proper operation before it is placed in service. Important checks are receiver sensitivity and transmitter frequency, deviation, and power output.

Red (+)

Black (–)

20A Fuses

factory test channels and other test parameters when they are shipped. The included labels should be attached to the option keys to indicate the function.

2.1.4 POWER SOURCE

This transceiver must be connect ed to a nominal 12 VDC, negative ground vehicle electrical system (negative battery terminal connected directly to the chassis). If the vehicle has some other type of electrical system, a suitable voltage converter is required.

2.2 TRANSCEIVER INSTALLATION

2.2.1 SELECTING MOUNTING LOCATION

2.1.3 TRANSCEIVER PROGRAMMING

The transceiver needs t o be pr ogrammed be fore i t is placed in service. Programming instructions are located in Section 4. Transceivers normally contain

This transceiver is designed for mounting in a location within convenient reach of the operator such as the dash, console, or floor. Since the mounting location can affect safe operation of the vehicle, observe the following precautions:

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INSTALLATION AND DISASSEMBLY

Figure 2-2 Mounting Bracket Installation

WARNING

•

Do not mount the transceive r where it may int erfere with the operation of vehicle controls.

•

Do not mount the t ransceiver whe re the use r cannot easily reach the controls and view the display.

•

Do not mount the t ransceiver where it may cause additional injury in case of an accident.

•

Air bags inflate with great force. Therefore, do not mount this transceiver in the deployment area of an air bag. In addition, do not place other objects in the deployment area or other locations where they could unintentionally move into the deployment area.

2.2.2 INSTALLING MOUNTING BRACKET

2.2.3 INSTALLING MICROPHONE HANGER

Install the included microphone hanger in a convenient location. For proper operation of functions such as monitoring and scanning, the hanger may need to be connected to chassis ground. If required, ground the hanger using the included grounding wire.

2.3 POWER CABLE INSTALLATION

2.3.1 GENERAL

It is recommended that both wires of the power cable be connected directly to the vehicle battery. Connection of either wire to other points m ay result in increased interference from the vehicle’s electrical system. If noise is sti ll a prob lem, t ry inst alli ng a noise filter.

Check the area behind the intended mounting location for wiring, brake and gas lines, or other components that could be damaged when the mounting screws are installed. Th en install the b racket and tra nsceiver as shown in Figure 2-2. Both standard and selftapping screws are included for installing the bracket.

November 1998 Part No. 001-7600-001

2.3.2 CABLE INSTALLATION

1. Before starting power cable installation, it is good practice to remove the negative cable from the battery to prevent damage from accidental short circuits.

2-2

INSTALLATION AND DISASSEMBLY

DB-9 Female Connecto r

Outside View

2. Route the red and black wires from the transceiver to the batte ry. Connect the red wire to the positive (+) terminal and the black wire to the negative (–) terminal.

3. Plug the cable into the pigtai l coming from the transceiver and reconnect the negative battery cable.

4. Install the antenna according to the manufacturer’s instructions. The transceiver has a standard UHF connector. Check VSWR. Reflected power should be less than 4% of forward power (VSWR less than

1.5 to 1).

2.3.3 POWER CABLE FUSES

Each power cable wire is protected by a 20ampere fuse. Thes e fuse s are inspec te d and ch anged a s shown below. If a fuse blows, locate the cause if possible and replace it with one of the same rating.

input that can be used to control the backlight (see Section 3.3.9). This cable is installed as shown in Figure 2-3.

This cable has a standa rd DB-9 female connector for interfac ing to external equipment. The pin numbering and functions are as follows:

DB-9 Pin Function

1 LCD backlight control in 2AF out 3 Detected AF out 4 Modulati on in 5 PTT control in 6 Horn drive control out 7 AF ground 8 Detected AF ground 9 Modulati on ground

Changing 20-Ampere Power Cable Fuses

2.4 USING AN EXTERNAL SPEAKER

An external speaker can be plugged into the external speaker jack on the back of the transceiver. This speaker should have an impedance of 4-8 ohms and a power handling capability of at least 3.5 watts. The internal speaker is a utomatically disabled when a speaker is plugged into this jack. The external speaker jack is a standard 1/8-inch, two-conductor phone jack.

2.5 ACCESSORY CABLE INST ALLATION

Optional Accessory Cable, Part No. 585-7600027, can be used for connecting accessories such a horn alert or modem to the transceiver. It also has an

Figure 2-3 Accessory Cable Installation

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INSTALLATION AND DISASSEMBLY

2.6 TRANSCEIVER DISASSEMBLY

Removing Bottom Cover and Front Panel

1. Remove the bottom cover b y removi ng four sc rews (A) as shown in Figure 2-4.

2. Remove the front panel by removing two screws (B).

Figure 2-4 Cover and Front Panel Removal

Removing PC Board

3. Remove ten screws (C) a nd t wo c li ps (D) as shown in Figure 2-5.

4. Remove shield (E).

5. Unsolder the antenna connector at three points (F).

Figure 2-5 PC Board Screws

Figure 2-6 Removing PC Board

6. Lift the front of t he PC bo ard assembl y as shown in Figure 2-6 and pull it out.

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INSTALLATION AND DISASSEMBLY

2.7 2-T ONE/5-TONE MODULE INSTALLA TION

2.7.1 INSTALLATION PROCEDURE

1. Turn power off and disconnect the power cable.

2. Remove the bottom cover by removing the four screws (A) shown in Figure 2-5.

3. Install the module as shown in Figure 2-7. The included foam pad is not used with this transceiver.

Screen Menu

program an option key or the microph one hanger for the monitor function s o that the decoder can be re-activ ated when the call is complete (see Table 4-2).

2.7.3 5-TONE PROGRAMMING

Program the transceiver for operation with a fivetone module as described in Section 4. Screens that need to be programmed with five-tone decoder information are as follows. Refer to on-line help for information on parameters in these screens (press F1 wit h parameter selected).

Model Menu

Section 4.4.6).

Select the following in the Screen Menu:

•

“Rx Code CH” and program the information in the screen (see Section 4.5.2).

- Select “Key & Displa y Assign” and

- “PMR” must be selected (see

Figure 2-7 2/5-Tone Module Installation

2.7.2 2-TONE PROGRAMMING

Program the transceiver for operation with a twotone decoder as described in Section 4. Screens that need to be programmed with two-tone decoder information are as follows. Refer to on-line help for more information on parameters in these screens (press F1 with parameter selected).

Model Menu

Section 4.4.6).

Screen Menu

program the information in the screen (see Table 4-6).

Screen Menu

gram the information under “2Tone Dec” for each channel on which the decoder wil l be use d (see Table 4-1).

- “LMR” must be selected (see

- Select “2Tone Code CH” and

- Select “Memory Channel” and pro-

•

“Tx Code CH” and program the information in the screen (see Section 4.5.2).

•

“User Tone” and program the info rmatio n i n the screen (see Section 4.5.2).

•

“Memory CH” and program the parameters in this screen that are related to 5-tone operation on the channel (see Fi gure 4-2).

NOTE: If performing the deviation adjustment in the next section, the long tone must be turned on in RPT/STN/ID on the Memory Channel screen.

•

“Key & Display Assign” and program Tx Code and Call switches for use in transmitting 5-tone codes.

Setting 5-Tone Deviation

The only adjustment on the 2/5-tone module is a potentiometer for setting the transmit tone deviation for 5-tone operation. This control is factory preset and should not require readjustment in the field. However, if adjustment is required, proceed as follows:

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INSTALLATION AND DISASSEMBLY

1. Monitor the transmi t si gnal wi th a communications monitor. Set it for HPF = Off, LPF = 20 kHz, Deemphasis = Off, and Level = (P-P)/2.

2. Select a channel near the ce nter of the band and turn a long tone on (see precedi ng “NOTE”) by pressin g the appropriate front panel key.

3. Adjust potentiometer R18 (DEV) on the module for the following deviation:

25 kHz Channel Spacing - ±3.5 kHz 20 kHz Channel Spacing - ±2.8 kHz

12.5 kHz Channel Spacing - ±1.7 kHz

4. Check channels on each end of the operating band to make sure deviation is within the following limits. If not, repeat preceding adjustment.

25 kHz Channel Spacing - ±3.0 to 5.0 kHz 20 kHz Channel Spacing - ± 2.4 to 4.0 kHz

12.5 kHz Channel Spacing - ±1.5 to 2.5 kHz

NOTE: It is recommended that scanning not be used with these options because in may cause part or all of the tone burst to be missed.

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2-6

SECTION 3 OPERATION

OPERATION

Volume

Down

VolumeUpTransmit

Microphone

Connector

Busy

Indicator

Scan List

Indicator

* The Channel Up/Down switches can also be programmed for other functions.

Indicator

Programmable Option Switches

Bell

Indicator

Monitor

Indicator

Alphanumeric

Display

Channel

Up*

Channel

Down*

Power Switch

Figure 3-1 7600 Front Panel

3.1 FEATURES

•

Up to 32 channels programmable

•

Multi-tone (CTCSS) and/or Mul ti-code (CDCSS) Call Guard® squelch programmable

•

VHF and UHF, wideband and narrowband models available

•

Up to 45 watts VHF and 35 watts UHF transmitter power output

•

Seven-character alphanumeric display with backlight

•

Six programmable option ke ys

•

Busy indicator

•

Normal and priority scan to ensure that calls are not missed

•

Up to five different user programmable scan lists selectable

•

Bank select available (up to two banks with sixte en channels each)

•

User selectable power output available

•

DTMF microphone optional

•

2-tone/5-tone signaling optional

NOTE: Some of the preceding features are available only if programmed.

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OPERATION

3.2 CONTROLS AND DISPLAY

3.2.1 FRONT PANEL CONTROLS

Power Switch (

- Press this switch to turn power

)

on and press and hold it to turn power off. The transceiver may be progr ammed so th at a passwor d must be entered to allow operation. Refer to Section 3.3.2 for more information.

Volume Up/Down Keys ( ) - Adjust the volume level up or down in up to 32 steps. The minimum selectable volume level can be set as desc ribed in Section 3.3.3.

Up/Down Keys ( ) - These keys may be programmed to select the next higher or lower channel or for other functio ns. Ref er to th e descri ption s in Sect ion

3.5 for more information.

Microphone Connector - Connection point for the microphone. Do not connect microphones other than standard microphone P.N. 589-7600-020 and DTMF microphone P.N. 589-7600-022 to this transce iver. The pin assignments could be different and damage to the microphone or transceiver may result.

F1/F2/F3/F4 - These keys ca n be programmed to control any of the fu nctions desc ribed in Section 3.5. Place the applicable included label on the switch to indicate its function.

Monitor Indicator ( ) - Indicates that the monitor mode is enabled. This mode disables coded squelch control so that all messages occurring on the channel are heard. Refer Section 3.4.4 for more information.

Display - This seven-character display indicates the selected channel, status information, and error conditions. If information in this display begins flashing, an error condition is indicated. Two possible causes are a defective antenna or a battery voltage below 8 VDC.

3.2.3 BACK PANEL

External Speaker Jack - Miniature phone jack for connecting an optional 4-8 ohm external speaker. The internal speaker is automatically disabled when a speaker is p lugged into this jack.

Antenna Jack - UHF-type jack for connecting the antenna.

DC Power Cable - Connects the transceiver to a nominal 12 VDC, negative ground vehicle power source. Refer to Section 2-1 for more information.

Accessory Cable - This optional cable is used to connect accessories such as a horn alert and modem to the transceiver. Refer to Section 2-1 for more information.

Ext Speaker

Jack

Antenna

Jack

3.2.2 DISPLAY

Transmit Indicator ( ) - Indicates that the transmitter is keyed or the 5-t one code is being sent (if appli cable). If this indicator is flashing, the internal temperature is high and the tr ansmitter power output is being cut back. Normal operation automatically resumes when the tempera t ure returns to the normal range.

Busy Indicator ( ) - Indicates the currently selected channel is busy (see Section 3.4.4).

Bell Indicator ( ) - Appears or flashes when a 5-tone call is detected that the transceiver is programmed to receive.

November 1998 Part No. 001-7600-001

Optional

Accessory Cable

Transceiver Back Panel

3.3 BASIC OPERATION

3.3.1 TURNING POWER ON AND OFF

When power is turned on by pressing the POWER switch, a tone sounds and an opening message is displayed if programmed. The transceiver is

3-2

DC Power

Cable

OPERATION

then ready to be used. To turn power off, press and hold the POWER switch until power turns off.

3.3.2 ENTERING A PASSWORD

The transceiver may be programmed so that a password must be entered before the transceiver can be used. When power is then turned on, “PWORD” is displayed and the fo ur- di g it pas sc ode mus t be entered. This code is entered using the F1-F4 and channel down ( ) keys. The number entered by each key is as follows. The numbers in a block are detected as the

Key

Number

Entered

0 5

1 6

2 7

3 8

4 9

same. For example, “1234” is the same as “6789”. If the “PWORD” indication does not turn off after entering four digits, you may have entered an incorrect number. Cycle transceiver power and try again.

3.3.3 VOLUME LEVEL ADJUSTMENT

and then again to return to the normal channel display.

F1 - Minimum volume level (see Section 3.3.3) F2 - Key beep on-off (see Section 3.5.4) F3 - Backlight on-off (s ee Section 3.5.2 F4 - Squelch adjust (see desc ription whic h follows)

3. To return the F1-F4 keys to the programmed functions, turn transceiver power off and on again without pressed.

3.3.5 CHANNEL SELECTION

Channel Scrolling - If the keys are pro- grammed as or keys, they can be

CH UP CH DN

pressed to scroll up or down through the programmed channels.

Direct Selection - The F1-F4 and keys can be programmed to directly select a specific channel. These keys are then labeled to .

CH 1 CH 4

The volume can be adjusted in up to 32 steps by pressing the volume up/down keys ( ). A graph in the alpha numeric di splay indi cates t he current volume level. If eq uipped wit h a option switch,

MONI

you may be able to press (or press and hold) that switch to enable audio for use as a reference level.

The minimum selectable volume level can be set by the power-on menu descri bed in Section 3.3.4. Select this mode and then press F1 to display “AFMIN”. Then press the volume up/down keys to select the desired minimum level. The current level is indicated by the bar graph, or receiver noise can be enabled as described in Section 3.3.6.

3.3.4 POWER-ON MENU

The power-on menu is a special menu that can be selected at power on to control various functions. Proceed as follows:

1. Select the power-on menu by turning power on wit h

the up and down keys pressed.

2. The F1-F4 keys now control the following func-

tions. Press the switch once to select the function

3.3.6 ADJUSTING SQUELCH LEVEL

The squelch level is adjusted by programming or selecting the power-on menu just described. Proceed as follows to use the power-on menu:

1. Select a non-busy channel. Then select the power-

on menu by turning power on with t he up an d down

keys pressed.

2. Press the F4 option key to select the squelch adjust

mode indicated by “SQ xx”.

3. Press the down key until noise is heard from

the speaker (adjust the volume if necessary). Then press the up key until the noise just mutes (the “SQ xx” number indicates the relative squelch level).

4. Reselect normal operation by turning p ower off a nd

on without the up and down keys pressed.

NOTE: If weak messages are not heard or unsquelching occurs when no messages are present, slight readjustment up or down may be required.

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Part No. 001-7600-001

OPERATION

3.3.7 BANK SELECT

Two banks of up to 16 channels each can be programmed. Only the channels in the current bank are then selectable. This would allow, for example, groups of channels to be programmed for operation in different cities.

The key is pressed to switch between

BANK

banks, and the current bank is indicated br iefly in the display as “BANK 1” or “BANK 2”. If bank select is not used, a single block of up to 32 channels can be programmed.

3.3.8 AUTOMATIC SCAN ENABLE

The transceiver can be programmed so that scanning is automatically enabled whenever power is turned on or the microphone is placed on-hook. Refe r to the scan description in Section 3.6 for more information.

3.3.9 BACKLIGHT ON-OFF

The following backlight modes can be selected by the option switch or by pressing F3 in the

LITE

power-on menu described in Section 3.3.4.

a microphone with a telephone keypad, or up to seven telephone numbers also may be preprogrammed and then selected by pressing the key (see descrip-

DTMF

tion in Section 3.5.7).

3.4.2 RECEIVING A CALL

1. Turn transcei ver power on and set the volume level as described starting in Section 3.3.1.

2. Select or scan the channe l or channels on which you want to receive the call. Refer to Section 3.6 for more information on scanning.

3. When the message is received , take the micropho ne off-hook and respond. Press the microphone pushto-talk (PTT) switch to talk and release it to listen.

4. When the conversation is finished, place the microphone back on-hook. The microphone hanger may control features such as scanning and monitoring that are described later.

3.4.3 PLACING A CALL

1. Turn transcei ver power on and set the volume level as described starting with Section 3.3.1.

LI ON - On continuously LI OF - Always off LI AT - Controlled by the voltage applied to pin 1

of the DB9 connector on the optional accessory cable (see “Light” in Table 4-2).

3.3.10 BEEP ON-OFF

The key beep which sounds when keys are

pressed can be enabled and disabled by pressing the

option switch or pressing F2 in the power-on

BEEP

menu described in Section 3.3.4. Either “BP ON” or “BP OF” is displayed to indicate the current mode.

3.4 RECEIVING AND PLACING CALLS

3.4.1 INTRODUCTION

The two calls which can be placed and received are mobile-to-mobile and telephone calls. With telephone calls, the tele phone number can be dialed using

2. Select the channel on which the call will be made as described in Section 3.4.

3. Regulations require that the channel be monitored before transmitting to make sure that it is not being used by anyone else. If you were to transmit while someone was talking, you would probably disrupt their conversation. Refer to “Monitoring Before Transmitting” description which follows for more information.

4. If the channel is not busy, press the microph one P TT switch to talk and release it to listen.

5. When the conversation is finished, place the microphone back on-hook.

3.4.4 MONITORING BEFORE TRANSMITTING

Use one of the following methods to monitor the

channel before transmitting a message:

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3-4

OPERATION

•

Note if the busy indicator ( ) on the front panel is being displayed. I f it is not, the channel i s not busy and a message can be transmitted.

•

Taking the microphone off-hook disables coded squelch control if it is programmed for the monitor function. Take the microphone off-hook and the

indication should be displayed. If no messages are heard, the channel is not busy and a message can be transmitted.

•

If the monitor ( ) option switch is pro-

MONI

grammed, pressing it disa bles coded squelch contro l similar to taking the microphone off-hook. If no messages are then h eard, the channel is not busy and a message can be transmitte d. Press the switch again to disable monitoring.

•

If the Transmit Disable On Bus y feature is pro grammed on the channel, t he trans mitte r is aut omatically disa bled if the channel is busy. This is indicated by th e display flashing and a rapid beeping when the PTT switch is pressed.

3.4.5 TIME-OUT TIMER

The time-out timer disables the transmitter if it is keyed continuously for longer than the programmed time. If the transmitter is disabled by this feature, the transmit indicator ( ) turns off and the display flashes and a beeping tone is produced until the PTT switch is released.

Table 3-1 Option Key Programmable

Functions

Function Key Label

Backlight On-Off 3.3.9 Bank Select 3.3.7 Beep on-off 3.3.10 Call Guard Tone Select 3.5.7 Channel Select

DTMF Number Select 3.5.7 Emergency Switch 3.5.8 Lock enable/disable 3.5.9 Monitor Mode Select 3.4.4 Output Power Select

Priority Channel Select 3.6.3 Receive Attenuate 3.5.13 Scan Select 3.6 Scan List Programming 3.6.2 T a lk -A rou nd Sel ect 3.5.16 2-Tone, 5-Tone Calling

Wide/Narrow Ban d Select

LITE BANK BEEP TONE

CH UP CH DN

CH 1 CH 2 CH 3 CH 4

DTMF

EMER

LOCK MONI

HIGH LOW1

LOW2

PRI A PRI B

ATT

SCAN

TAG

CALL CAL A CAL B TX CH CODE ID MR

W/N

Description

Section No.

3.3.5

3.5.11

3.5.18

3.5.19

One use of t his feature is to prevent a channel from being kept busy for an extended period by an accidentally keyed tr ansmitter. It can also prevent possible damage to the transceiver caused by transmitting for an excessively long period.

There is also a penalt y timer that may be programmed to prevent further transmissions for the programmed time after the transmitter is disabled.

3.5 PROGRAMMABLE FUNCTIONS

3.5.1 INTRODUCTION

The F1-F4 and keys on the fr ont pa nel can be programmed for the functions shown in

Table 3-1. A sheet of labels is included with the transceiver , and the applicabl e label should be placed on the key to indicate its function. Refer to th e section listed in the table for a descriptio n of the function.

3.5.2 BACKLIGHT ON-OFF

Refer to Section 3.3.9.

3.5.3 BANK SELECT

Refer to Section 3.3.7.

3.5.4 BEEP ON-OFF

Refer to Section 3.3.10.

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OPERATION

HIGH

PRI A

PRI B

3.5.5 CALL GUARD TONE SELECT

If the transceiver has a key, the Call

TONE

Guard (CTCSS) tone can be selected. This allows calls to be placed to different mobiles or groups of mobiles and received on d ifferent groups than is normal f or the channel. Proceed as follows:

1. Press the key and “TON--x” is displayed.

TONE

2. Press the channel up/down ( ) keys to select the desired tone (“TON--1” to “TON--9”).

3. Press the key again to exit this mode. Calls

TONE

are then placed on the current channel and other channels using the new code until it is changed.

4. To reselect the standard Call Guard squelch tone programmed for the channel, select “TON--M” using the same procedure.

3.5.6 CHANNEL SELECT

Refer to Section 3.3.5.

3.5.7 DTMF NUMBER SELECT

transmission begins, the call cannot be canceled. Programming determines the channel on which the call is transmitted and also if it is transmitted once or repeatedly until a control code is received.

3.5.9 LOCK KEY

Press and hold the key to lock all pro-

grammable keys except and .

LOCK

CALL MONI EMER

Either “LK ON” or “LK OF” is displayed to indicate the current condition. If a locked key is pressed, all that happens is “LOCK” is displayed.

3.5.10 MONITOR MODE SELECT

Refer to Section 3.4.4.

3.5.11 OUTPUT POWER SELECT

The and keys can be used

LOW1 LOW2

to temporarily or permanently override the programmed power output for the channel. The programming of the “RF Power Selection” param eter in Table 4-2 determines operati on. Pressing the key once selects the level on the key and pressing it again selects the programmed level.

If the transceiver has a key, up to seven

DTMF

preprogrammed telephone numbers can be transmitted. Proceed as follows:

1. Press the key and the currently selected

DTMF

number is indicated as “DTMF x”.

2. Press the channel up/down keys ( ) to select a different number.

3. To transmit the selected number on the current channel, press and hold the key.

DTMF

NOTE: The DTMF 6 number is used for emergency calls and the DTMF 7 number is used for automatic logging. Therefore, if these features are used, the number may not be available for regular calls.

3.5.8 EMERGENCY KEY

Press and hold the key to transmit an

EMER

emergency call. To cancel th is call before it is transmitted, press and hold thi s key agai n. Once emer ge ncy

3.5.12 PRIORITY CHANNEL SELECT

Pressing selects t he priority A channel and pressing selects the priority B channel. The key can also be programmed so that press-

PRI A

ing and holding the key makes the current channel the priority A channel. Refer to Section 3.6.3 for more information.

3.5.13 RECEIVE ATTENUATE

Pressing th e key turns receive signal

ATT

attenuation on and off. Either “AT ON” or “AT OF” is displayed to indicate the current mode. The attenuator can be turned on if nearby strong RF signals such as commercial radio stations or pager transmitters are causing distortion of the receive signal.

3.5.14 SCAN SELECT

Pressing th e key turns the channel scan

SCAN

feature on and off. Refer to Section 3.6 for more information.

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OPERATION

3.5.15 SCAN LIST PROGRAMMING

Pressing the key changes the scan list sta-

TAG

tus of the cu rrent channel. Refer to the scan list description in Section 3.6.2 for more information.

3.5.16 TALK-AROUND SELECT

The talk-around mode causes transmissions to occur on the receive frequency to permit dir ec t mobile-to-mobile communication when a repeater is being used. The talk-around mode is turned on and off by pressing the key. Either “AR ON” or “AR

OF” is briefly displayed to indicate the current mode. Changing the channel or turning power off causes talkaround to revert to the off condition.

3.5.17 2-TONE CALLING FEATURES

If the optional 2-tone signaling option is used, pressing the key transmits the 2-tone codes on

CALL

the selected channel or on a non-busy channel if pressed while scanning.

3.5.18 5-TONE CALLING FEATURES

If the optional 5-to ne signa li ng opti on is us ed, the following keys may be pr ogr ammed to control various functions.

- Transmit the 5-tone call.

CALL CAL A CAL B

Depending on your signali ng system, cal l transmi ssion may be necessary before you call another station. The CAL A and CAL B keys may be programmed when selective Individual/Group calls are used.

- Selects the 5-tone code to be transmitted. To

TX CH

change the contents of the station code, push and hold this key and then press the keys.

- Selects th e transmit code directory.

CODE

- Recalls last five codes received. Press and

MR CH

hold to erase all codes. To scroll, pr ess .

3.5.19 WIDE/NARROW BAND SELECT

Pressing the key switches the receiver

W/N

between narrowband and wideband operation. The

display briefly indicates “WIDE” or “NARROW” to indicate the current mode. Each channel can also be programmed for wide or narrow band operation, and this switch toggles that setting. However, the change is only temporary because the programmed condition is reselected if the c h an nel is changed or power is cycled.

3.6 CHANNEL SCAN

3.6.1 INTRODUCTION

The channel scan f eature monitors t he channe ls in the current scan list. When a message is detected that the transceiver is programmed to receive, scanning stops and the message is received. Shortly after the message is complete, scanning resum es (after the resume timer counts down). The selected channel changes to that of the call.

If the microphone is taken off-hook or the transmitter is keyed while scanning, scanning resumes when the auto reset timer selected for the channel counts down. Scanning does restart if this timer is disabled or if the Scan A key is programmed with poweron scan disabled (see Tables 4-2 and 4-5).

Scanning is turned on and off by the key.

SCAN

The transceiver also may be programmed so that scanning automatically turns on whenever power is turned on or the microphone is placed on-hook. The microphone must be on-hook for scanning to occur.

The decimal point in the di splay flashes when the scan mode is enabled. Then when scanning is actually occurring, either the scan list identification (see next section) or the ra pidly c ycling chan nel ide ntif icati on is displayed as the channels are scanned. Programming determines which occurs (see Table 4-5).

3.6.2 SCAN LISTS

Up to five scan lists can be selected by pressing and holding the key until the scan list identifi-

SCAN

cation appears and then pressing the keys. Press the key again to exit this mode (this also

SCAN

occurs automaticall y in ab out 30 secon ds) a nd again to enable scanning (if desired).

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OPERATION

PRI A

The scan lists are user programmable if the

key is available. Pressing this key changes the

TAG

status of the displayed channel in the current scan list only. The display indicates “SC ON” if the channel was just added to the scan list and “SC OF” if it was just deleted. In addition, the sc an list sta tus is in dicat ed by the decimal point in t he display. This indicator is on when the displayed channel is scanned. The decimal point flashes when scanning is occurring.

The scan list status of a channel can be changed while scanning only when listening to a message on the channel. The current status of all the lists is sto r ed in memory. Therefore, the status of the various scan lists does not change when power is turned off.

3.6.3 PRIORITY CHANNEL SAMPLING

Priority channel sampli ng en sur es that me ssa ges on priority channels are not missed while listening to

messages on other channels. If priority sampling is used, a priority A channel is designated by programming. If the key is available, pressing that key selects the priority A channel. This key also may be programme d so that if it is pressed and held, the priority A channel changes to the current channel.

Sampling of the priority A channel occurs only when scanning is enabled. It does not occur while transmitting. When the priority channel is sampled while listening to a message on another channel, a series of “ticks” are heard. These ticks are brief i nterruptions of the audio signal that occur while the transceiver changes channels to check the priority channel.

Another priority channe l also can be pr ogrammed that can be quickly selected by the key. This

PRI B

channel is programmed only to allow quick selection and is not sampled while listening to a non-priority channel.

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3-8

SECTION 4 PROGRAMMING

Programming Cable

(Includes Le vel Convert. Circuit)

P.N. 585-7500-031

Female DB9 Plug To Computer

PROGRAMMING

Figure 4-1 Programming Setup

4.1 GENERAL

4.1.1 PROGRAMMING SETUP

The following items are required to program this transceiver. The part numbers of the programming cable and software ar e shown in Table 1-1. A printer is also recommended for making a hard copy record of the information programm ed into the transceiver. The programming setup is shown ab ove.

•

IBM® PC AT or PS/2 compatible computer with one available serial port

•

MS-DOS® version 5.02 or higher or equivalent

•

E.F . J ohnson programmin g cable (inclu des require d level converter circuit) and adapter cable

•

E.F. Johnson programming software

4.1.2 PROGRAMMING CABLES

Programming Cable, Part No. 585-7500 -03 1, and Adapter Cable, Part No. 58 5-7600- 031, are r equire d to

Adapter Cable

P.N. 585-7600-031

connect the computer to the transceiver. The programming cable has a female DB9 connector which plugs into the serial port of the computer. In this connector is a level converter circuit which converts the RS-232 levels of the computer to the logic levels required by the transce i ver. The other end of th e cable plugs into the adapter cable which adapts the miniature phone plug to the modular-styl e microphone conne ctor on the transceiver. Turn transceiver power on after these cables are connected.

4.1.3 PROGRAMMING SOFTWARE

The programming software is distributed on a 3-1/2” 1.44 M diskette. Th is disket te incl udes the mai n executable program RP7600.EXE and several ancillary files it requires to run. These files total approximately 430k in size. Also included on this disk is the ADJUST program used to tune the transceiver. This program and other files it requires to run total about 180k in size and are located in a separate subdirectory

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on the disk called ADJ. The use of this program is described in Section 5.

These are DOS programs, so Windows® 3.x, 95, or NT are not required to run them. If the program does not run properly in Windows, run it in the DOS mode.

Before you use the program, the files on the diskette should be copied to your hard disk or a programming disk. Do not use the distribution disk for programming or transceiver tuning because it should be kept as a backup in case something happens to the program on the working disk.

4.2 STARTING THE PROGRAM

Proceed as follows:

1. Start the computer in the DOS mode. If the pro gram

is not installed on a hard drive, insert th e programming disk in drive A.

•

The Space or backspace key toggle the setting.

•

Use the File menu to save the data and exit the program.

4.4 MENU FLOW

4.4.1 INTRODUCTION

The menu bar along the top of the screen is used to select the various menus that are used to program this transc eiver. Press the ALT or ESC key to enable this menu bar. Then to move horizontally to select a menu, use the arrow (← lighted letter in the title. Then to display the menu and highlight the desire d item, use the arrow (↓ ↑) keys and then press ENTER to select it. The following describes each of the menus that can be selected.

4.4.2 FILE MENU

→

) keys or type the high-

2. Make the directory of the program the cur rent dir ectory. Then start the program by typing RP7600 (Enter).

3. The Memory Channel screen described in Section

4.4.3 is then displayed. Set or modify the data as desired. Make sur e to scroll r ight using the → key so the right-most screen parameters can be programmed.

4.3 SPECIAL KEYS AND FUNCTIONS

•

Information on the various parameters is available in the form of help screen s. To display information on the currently highlighted function or setting, press F1.

•

Pressing ALT or ESC selects the menu on top or returns to the previous screen.

•

↑ ↓ keys or highlighted character keys move the cursor.

Load - Loads data from a previously saved data file. To display the directory, press (Enter) again.

Save - Saves the current data to the specified file. The extension “. ICF” is automatically added to the file name.

Delete - Dele tes the current file.

Dos - Allows you to go to the DOS mode to perform a

function in DOS such as copying a file. To return to the previous screen, type EXIT.

Exit - Quits the program and exits to DOS.

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PROGRAMMING

4.4.3 SCREEN MENU

LMR (U.S.) Format

NOTE: The Screen menu for PMR (European) models is slightly different than the LMR version shown above. Refer to Section 4.5 for more information on PMR models.

Memory Channel - Displays the screen shown in Table 4-1 which is used to program channel parameters such as frequency, Call Guard (CT CSS/DCTS) coding, and power output. The screen in Table 4-1 is for LMR models; refer to Section 4.5 for information on the PMR version.

Key and Display Assign - Displays the screen shown in Table 4-2 which assigns functions to the programmable keys.

Common - Displays the screen shown in Table 4-7 which programs miscellaneous information such as various timer settings.

Expert - Displays the screen shown in Table 4-8 which programs various timers and other information. Normally, the default value in this screen should not be changed.

4.4.4 PROGRAM MENU

Read ← TR - Reads the data programmed in the connected transceiver.

Write → TR - Programs the connected transceiver with the current data.

Information - Displays information on the connected transceiver such as the model, revision, and the “Program Comment” programmed in the Common screen (see Table 4-7).

DTMF Autodial - Displays the scr een shown in Table 4-3 which programs five DTMF code channels (prestored telephone or other numbers). Up to 24 characters can be programmed in each location.

Continuous Tone - Displays the screen shown in Table 4-4 which programs nine user selectable Call Guard (CTCSS) tones.

Scan List - Displays the screen shown in Table 4-5 which programs various parameters for each scan list.

2-Tone Code Channel - Displays the screen s hown in T able 4-6 which programs transcei ver oper ation wi th a 2-tone option. The optional 2/5-Tone Decoder Kit, Part No. 585-7500-026, is required to use the 2-tone function. This screen is displayed with LMR models only (see Section 4.4.6).

4.4.5 PRINT MENU

Current - Prints the currently displayed data.

All - Prints all data for the selected file.

4.4.6 MODEL MENU

LMR - Selects LM R (U.S.A.) models. Selecting this model displays unique parameters in various screens for programming a 2-tone option. The differences are

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in the Screen menu (see Section 4.4.3), Memory Channel screen (see Table 4-1), and DTMF Autodial screen (see Table 4-3).

Refer to Section 4.5 for mo re information on PMR models.

4.4.7 SETUP MENU

PMR - Selects PMR (European) models. Selecting this model displays unique parameters for program-

Display Type - Select the color or monochrome 1 or 2

display modes. ming a 5-tone option. As with the LMR selection, unique parameters are displayed in the Screen menu and Memory Channel an d DTMF Autodial screens.

RS-232C - Selects the computer seri al p ort b ein g used

to connect the computer to the transceiver.

Table 4-1 Memory Channel Screen Description (LMR Models)

Parameter Description

NOTE: To display th is part of the screen, scroll over using the → arrow key

Up to 32 channels or two banks of 16 channels can be programmed. To program the channels as two banks, first program the “MR-CH Bank/Free” parameter in the Key and Display Assign screen for “Bank” as described in Table 4-2. In addition, a “Bank” option switch must be programmed in this screen to select banks. To switch between banks when programming channels, press the PgUp/PgDn keys.

November 1998 Part No. 001-7600-001

Bank Select

4-4

Table 4-1 Memory Channel Screen Description (LMR Models) (Continued)

Parameter Description

Ch Atr

(Channel

Attribute)

Frequency

(Rx/Tx)

CTCSS/

DTCS

(Rx/Tx)

Press (Enter) to display the menu which selects one of the following choices:

A: Prio rit y A - The chan nel is selected when the Prio A key is pressed, and it is monitored during priority scan.

In addition, the microphone hanger can be programmed so that this channel is automatically selected whenever an off-hook condition occurs (see Table 4-2).

B: Priority B - The channel is quick selected when the Prio B key is p ressed. It is not monitored during priority

scan.

E: Emergency Channel - Transmission occurs on the channel when the Emergency s witch is pressed. Emergency Off - Deletes the emergen cy designation o n curren t channel if applicable. If n o emerg ency chan nel

is designated, transmission occurs on the currently selected channel.

SmarTrunk II™ On/Off - Toggles the SmarTrunk function on and off on the bank. This function is not

available with this transceiver.

Channel Insert - Inserts a blank channel by pushing the other channel information down one line. Channel Delete - Deletes the programming information on the current line and moves the channel information

below it up one line.

Return - Exits the menu and returns to the main screen. Enter the desired frequency for the channel. Enter a frequency within the frequency range of the transceiver:

VHF = 136-155 or 146-174 MHz, UHF = 400-430, 450-470, 470-490, or 488-512 MHz. Channel steps in multiples of 5.0, 6.25, or 7.5 kHz only. If no receive frequency is entered, no other data can be programmed on the line. Other special functions associated with frequency are as follows: Rx Fre q - Press the backspace key to toggle between wide and narrowband. Nar rowban d is in dicated b y “n” to

the right of the frequency. Press the spacebar to toggle receive inhibit on and off indicated by “i” to the left of the frequency. This limits the channel to priority or emergency use only (it is not available as a regular channel).

Tx Freq - To enter the same frequency as the receive frequency, enter nothing or “=”. The “←” symbol means

same as receive frequency. Enter a space to disable transmitting on the channel (“Inhibit” is then displayed). F8 and F9 can be used to cut and paste frequencies. Press (Enter) when the desired frequency has been

entered. Enters the receive and transmit tone (CTCSS) Call Guard® frequency or digital (DTCS) Call Guar d code. Press (Enter) to display the tone selection table. Select a tone by scrolling to it and pressing (Enter). Press the spacebar or backspace key to increase or decrease the entered frequency. The “←” symbol means same as receive code.

PROGRAMMING

The length of the CTCSS reverse burst can be set by the “CTCSS Reverse Burst” parameter on the Common Screen (see Table 4-7). A non-standard CTCSS tone from 60.1 to 300.1 Hz can be specified on the Expert screen and then selected by “USER”. If a CTCSS tone is selected by the TONE option switch, it overrides the channel programming until “TON--M” is reselected.

Digital codes must

always be entered directly (there is no table) and tone frequencies can be entered dir ectly. Be sure to enter the tone decimal point or the number is interpreted as a digital code. To toggle the polarity of digital codes, press the spacebar or backspace key. The N or I indicates Normal or Inverted polarity. In addition, the polarity of digital Call Guard signaling for all channels is set on the Expert screen.

Text P rograms the 7-character alpha tag that is displayed when a channel is selected. If no text is programmed, the

channel number is displayed as CH-xx. Allowable characters are A-Z (upper or lower case), 0-9, ’ * , + $ ’ ( ) – / < = > ? @ [ \ ] _ { | } ~. However, some characters, especially lower case letters, may be difficu lt to see. The tx up arrow is displayed by “:” , and the rx down arrow by “;”. Special characters may be programmed in the Expert screen (see Table 4-8) and used for the positions 3-7 only (positions 1 and 2 can display only regular characters). To enter a special character, press PgUp/PgDn to scroll through and select characters A-P.

TOT

(Time-Out

Disables the transmitter on that channel if it is keyed continuously for longer than the programmed ti me. The times for this timer and other related functions are programmed in the Common Screen (see Table 4-7).

Timer)

Smartrunk II™ is a trademark of Smartrunk Systems Inc.

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Table 4-1 Memory Channel Screen Description (LMR Models) (Continued)

Parameter Description

RF PWR Programs the RF power output for the channel (High, Low1, Low2). This setting can be temporarily or perma-

nently overridden by the HIGH, LOW1, or LOW2 power option switch if it is programmed (see Table 4-2).

Lockout Transmit Disable On Busy. The following conditions can be programmed:

Off - No restrictions; the transmitter can be keyed even while receiving a signal. Busy - Transmitting is inhibited if the channel is busy (carrier present). Repeater 1 - Transmission is permitted only when (1) receiving a signal on the programmed Call Guard tone or

code (CTCSS/ DCTS) or (2) when no carrier is being detected.

Repeater 2 - T rans mission is permitted when (1) receiving any Ca ll Guard ton e o r co de ( CTCSS/DCTS) or (2)

when no carrier is being detected.

NOTE: If an attempt is made to transmit in a lockout condition, tra nsm itting is inhibited for the “Lockout Penalty Time” programmed on Common screen (see Table 4-7).

Scan Assigns the channel to up to five scan lists and also programs if the scan list status can be changed by the scan

list programming key (TAG). Press the spacebar to enter or delete all lists or press 1-5 to toggle the status of a list. Press the backspace key to toggle the inhibit status. Scan list programming is inhib ited when parentheses are displayed around the numbers (or underline characters).

Auto Reset If PWR ON Scan is enabled in the Scan screen (see Table 4-5), this selects the time delay before scanning

resumes after a call is complete (the signal disappears) or a key is pressed. Either Timer A or Timer B can be selected. These timers are programmed in the Common Screen (see Table 4-7). Auto reset can be turn ed off by setting the timer to “Off” (0).

2-Tone Enables 2-tone operation on the channel and specifies the 2-tone code used. The 2-tone codes are programmed

in the 2-Tone Code Ch screen (see Table 4-6). This requires the optional 2/5-tone module.

Log On/Off Specifies if the DTMF ID code is transmitted when the PTT switch is pressed and releas ed. Th e DTMF code is

specified on the Log/ID line of the DTMF Autodial screen (Table 4-3). In the Common screen, if “TOT Timer ID Out” is “Yes”, this ID is also transmitted just before the transmitter is disabled by the time-out timer. The following conditions can be programmed:

OFF (blank) - No ID code is transmitted. Log In - The ID code is transmitted when the PTT switch is pressed. Log Off - The ID code is transmitted when the PTT switch is r eleased. Both - The ID code is transmitted when the PTT switch is pressed and again when it is released.

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PROGRAMMING

Table 4-2 Key and Display Assign Screen Description

KEY ASSIGN PARAMETERS

The and F1-F4 option keys can be programmed for the following functions. Press the (Enter) key and then

PgUp/PgDn to display and then select the desired function.

Parameter

Null --- No function (key disabled). CH Up CH Down MR-CH 1 MR-CH 2 MR-CH 3 MR-CH 4 Bank BANK Toggles the current bank between Bank 1 and Bank 2. This key can be programmed only if the “MR-

Scan A Scan B Start/Stop

Scan Add/ Delete Prio A Prio A (Re) Prio B

Moni (Audi)

Key

Label

CH UP CH DN

CH 1 CH 2 CH 3 CH 4

SCAN Pressing this key toggles scanning on and off. In addition, pressing and holding the key enables the

TAG Scan list programming key. Pressing this key changes the scan list status of the current channel in the

PRI A PRI A PRI B

MONI Toggles the monitor mode on and off. This mode deactivates the Call Guard (CTCSS/DTCSS) or

Scroll up or down through the programmed channels. Holding the key down causes the function to repeat.

Directly selects Channels 1, 2, 3, or 4, respectively.

CH Bank/Free” parameter in this screen is programmed “Bank”.

scan list select mode. The current scan list is indicated, and it is changed by pressing the up/down

keys. Either the Scan A or Scan B mode or both can be programmed. Operation is as follows:

Power-On Scan “Off” (see Table 4-5) - It starts and stops scanning with no auto restart. If the transmitter is keyed during scanning, the scan mode is exited. Power-On Scan “On” - It stops scanning only until the Auto Reset Timer expires (see Table 4-7). If the transmitter is keyed during scanning, scan automatically resume s when the Auto Reset Timer expires.

Power-On Scan “Off” or “On” - It starts and stops scanning with auto restart. If the transmitter is keyed during scanning, scan automatically resumes when the Auto Reset Timer expires.

current scan list (see Section 3.6.2). Pressing a Prio A key selects the Priority A channel, and pressing a Prio B key selects the Priority B channel. Pressing a Prio A (Rewrite) key also selects the Priority A channel. In addition, if it is held, the current channel is made the Priority A channel. Priority channel sampling is programmed in the Scan List screen (see T able 4-5).

2-tone mute functions (see Section 3.4.4). Pressing and hold ing this key uns quelches the receiver for as long as it is held.

Description

Scan A

Scan B

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Table 4-2 Key and Display Assign Screen Description (Cont inued)

Parameter

RF ATT ATT Lock LOCK

Beep BEEP Light LITE Bank Up High Low 1 Low 2

C. Tone CH Ent

Talk Around Wide/ Narrow

DTMF Autodial

Emergency Single Repeat

OPTx Out

OPTx Mom Out

Call CALL Call A/B CALL Tx Code/ CH Up/Dn ID MR Select Trunking Group Switch

Hanger Action

Beep On/ Off

Key

Label

HIGH LOW1 LOW2

TONE

W/N

DTMF

EMER

OPT1 OPT2 OPT3

TX CH

ID MR

GRP

Any or none of the following hanger functions can be programmed:

Monitor Scan Prio A -

Enables or disables the ke y p ress bee p. Th is programming can be overridden by the power-on menu (see S ectio n

3.3.4) or B EEP key (see S ection 3.3.10).

Description

Toggles the receive attenuate function on and off (see Section 3.5.13). Locks/unlocks all programmable keys except CALL, MONI, and EMER to prevent them from being

accidentally pressed (see Section 3.5.9). Toggles the key beep function on and off (see Section 3.3.10). Turns the LCD backlight on and off (see Section 3.3.9). Selects the other bank of sixteen channels if applicable. Changes the power output for the current channel to the level programmed of the key. Pressing the key again reselects the preprogrammed power level for the channel. The change may be temporary or permanent for that channel depending on the programming of the “RF PWR Selection” parameter later in this screen (see description which follows). (Continuous Tone Memory Channel) This key selects the continuous tone mode which allows the Call Guard (CTCSS) tone to be selected from the front panel (see Section 3.5.5). These tones are programmed by the Continuous Tone screen described in Table 4-4. Toggles the talk-around mode on and off (see Section 3.5.16).

Tem porarily toggles between the wide and narrow band modes (see Section 3.5.19). When th e channe l is changed or power is cycled, the wide/narrow mode programmed for the chann el frequ ency s pecified in the memory Channel screen is again selected.

Pressing this key enables the DTMF autodial mode. After pressing this key, the number to be dialed is selected by the up/down keys. Then press and hold this key to transmit the number (see Section 3.5.7). The available DTMF numbers are programmed by the DTMF Autodial screen described in Table 4-3. Pressing this key transmits an emergency call. If “Single” is programmed, it is transmitted only once; if “Repeat” is programmed, it is transmitted repeatedly with LMR mod els, or until the pr oper 5-to ne code is received with PMR models. The emergency channel is specified by the CH Atr parameter on the Memory Channel screen described in Table 4-1. A DTMF code is transmitted if it is entered on the “Emergency” line of the DTMF Autodial screen (see Table 4-3). Additional emergency parameters are programmed in the Expert screen described in Table 4-8. A “OPT1-OPT3 Out” key switch es the respec tive pin of the 30-pin option connector high or low (this connector is located inside the transceiver, and is used, for example, by the optional 2/5-tone module). A “OPT1-OPT3 Momentary Out” key produces a high or low pulse on the res pective pin of this 3 0-pin connector.

When equipped with the optional 2/5-tone module, transmits the 2-tone or 5-tone code. PMR mode w/5-tone option only. Transmits code using channel 30 (A) or 29 (B). PMR mode w/5-tone option only. Selects transmit 5-tone code.

PMR mode w/5-tone option only. Recalls and erases stored codes that have been received

This switch is for a SmarTrunk function, so it is not available with this transceiver.

OTHER MENU PARAMETERS

Disables CTCSS/DCTS Call Guard signaling on off-hook and re-enables it when back on-hook.

Automatically enables scanning when placed on-hook.

Automatically selects the priority A channel when taken off-hook.

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Table 4-2 Key and Display Assign Screen Description (Cont inued)

Parameter Description

Light

RF Power Selection

MR-CH Bank/Free

Opening Text

Enables or disables the display and key backlight. This programming can be overridden by the power-on menu (see Section 3.3.4) or LITE key (see Section 3.3.9). The “Auto” configuration allows it to be controlled by pin 1 of the DB9 connector on the optional accessory cable. The on condition is selected by 0 volts (low) and off by 12 volts (high). This can be programmed for one of the following configurations:

MR CH Individual -

is only temporary. Power returns to the level programmed for the channel when the channel is changed or transceiver power is cycled.

Override -

level is permanent on the channel (chang ing the chan nel or cycling power does not change the selected po wer level). Pressing the key again on the channel reselects the preprogrammed level.

Free Bank -

switch must be programmed to select the banks (see Section 3.3.7). If text is entered, it is displayed and a tone so unds for 2 seconds when power is turned on. If no text is programmed, no tone sounds and no message is displayed. The characters and ot her information described for “TEXT” in Table 4-1 also applies to this text.

The power output selected by above power keys overrides the channel programming. The selected

Select if banks are not used. One block of up to 32 channels is programmed.

Select if channels are to be programmed as two banks with up to 16 channels each. The BANK option

The power output selected by the HIGH, LOW1, LOW2 keys (see preceding description)

PROGRAMMING

Table 4-3 DTMF Autodial Screen Description

This screen is used to program the DTMF autodial codes that can be transmitted by pressing the DTMF key (see Table 4-2). Each location can contain up to 16 characters. Allowable characters are 0-9, A-D, *, and #. Press the INS key to toggle between the insert and overwrite modes. To clear a location, press the spacebar and then (Enter). Press ALT or ESC to cancel the entered codes before input. The code on the “Emergency” line is transmitted when the Emergency key is pressed (see Table 4-2). Likewise, the code on the “Log/ID” line is transmitted when the Log/ID channel parameter is enabled (see Table 4-1) and when the time-out timer expires (see Table 4-7). With PMR models, “4” and “5” are displayed in place of “Emergency” and “Log/ID”.

Parameter Description

DTMF

Timer

1st Timer

[*] [#] Timer

Sets the time interval in seconds for each code emission and interval.

Sets the tone period in seconds for the first DTMF code. This period is affected by the scanning period and power saver function delays of receiving transceivers. Sets the tone period in seconds for the * character (same as “E”) and # (same as “F”). These codes can be used for control codes on some systems. NOTE: When these special codes are used for the first code, the “1st

Timer” has priority over this setting.

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Table 4-4 Continuous Tone Screen Description

Description

The continuous tones programmed in this screen are selected by pressing the C.Tone CH Ent function key (see Table 4-2) and then pressing the up/down keys. This allows the user to select the continuous tone being transmitted and received on the current channel. To transmit or receive using the codes programmed for the channel in the chann el scr een (see Table 4-1), select “TON--M” using the keys.

Table 4-5 Scan Function Screen Description

Parameter Description

This screen is used to configure each of the up to five scan lists that can be selected. Channels are assigned to a scan list in the Memory Channel screen described in Table 4-1 and by the TAG key described in Table 4-2. Scanning is turned on and off and a specific scan mode is selected by the SCAN key also described in Table 4-2. Scanning may be enabled at power on (see following) and by placing the microphone on-hook (see “Hanger Action” in Table 4-2).

Scan Mode

Text

The following conditions are programmable:

Scan Off M1 (Normal) M2 (Prio A) -

scanning is turned off while receiving a message in the scan mode, the transceiver switches to that channel.

M 3 (Prio A) -

channel is selected.

Programs the text that is displayed while scanning with that scan list selected. If “OFF” is programmed, the text is not displayed. Instead, the alpha tag (or channel number) programmed for each channel is displayed as the channel is scanned. The characters and other information described for “TEXT” in Table 4-1 also applies to this text.

Deactivates that scan list so that it cannot be selected.

Selects normal (non-priority) scanning from the lowest to highest channel.

Selects scanning from the lowest to highest channel while checking the Priority A channel. If

Same as Mode 2 except that if scanning is turned off while receiving a message, the Priority A

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Table 4-5 Scan Function Screen Description (Continued)

Parameter Description

Stop Timer

Resume

Timer

PWR ON

Scan

Auto CH

Call

When Mode 2 or 3 above is programmed (priority scanning), this sets how often in seconds the priority channel is checked while receiving a message on some other channel. This sets the scan resume delay in seconds. This is the time that elapses before scanning resumes after a message is received.

If this function is programmed “On”, scanning starts automatically when transceiver power is turned on. The “Hanger Action” parameter in Table 4-2 should also be programmed for “Scan” if power-on scan is used. If scanning halts to transmit a message, the timer selected for Auto Reset parameter in the channel screen (see Table 4-1) determines the delay before scanning resumes. See also Scan A/B function in Key Assign screen (Table 4-2), “Scan” column in 2-Tone Code CH screen (Table 4-6), “Timer A/B” in Common screen (Table 4-7), and “Fast/Slow Scan Timer” in Expert screen (Table 4-8). The parameter is displayed only in the PMR (European) mode, and is used with the 5-tone option. If “On” is programmed, pressing the CALL key (1) starts scanning, (2) detects a non-busy channel, and (3) transmits the 5-tone co des.

PROGRAMMING

Table 4-6 2-Tone Code Channel Screen Description

Parameter Description

Rx Freq

1st/2nd

Group Call

Text

Bell

ANS

EXO

Sets the frequencies for the first and second tones from 250-3300 Hz. The closest tone is selected.

Programs if the 1st or 2nd tone is used for the group code. Programs the text that is displayed when a matched 2-tone is received. The characters and other information

described for “TEXT” in Table 4-1 also applies to this text. Selects the bell indicator condition when receiving a matched 2-tone. The following conditions can be programmed:

The bell indicator condition is not changed, even when a matched code is received.

Null -

The bell indicator goes off.

Off -

The bell indicator appears until a key is pressed.

On Blink -

Turns the Answer Back function on and off. This function transmits a 1 kHz single tone for 2 seconds when receiving a matched 2-tone code.

“On” activates an external alert such as a horn or buzzer when a matching 2-tone code is received. The activation time is set by “EXO Timer” in the Rx Code Common screen (see below). The optional accessory cable is required to utilize this feature.

The bell indicator blinks un til a key is pressed.

NOTE: Optional 2/5-Tone Module, P.N. 585-7500026, is required to utilize the twotone feature.

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Table 4-6 2-Tone Code Channel Screen Description (Continued)

Parameter Description

Beep

Auto Tx

Stun

Scan

Emits (or turns off) the following beeps when receiving a matched 2-tone:

Beep emission (or non-emission) is retained even when receiving a matched 2-tone.

Null -

Repeater beep emission is turned off.

Off Pi (Single) PiPi (Single) PiRo (Single) Pi (Repeat) PiPi (Repeat) -

Sets the transceiver to the transmit condition (by activating the microphone PTT) when receiving a matched 2-tone code. This transmit time can be set in the Auto Tx Timer parameter in the Rx Code Common screen (see below).

When a matched 2-tone is received, the transceiver is set to the following condition that is programmed:

Off Kill Stun -

entered. See also “User Password” and “Pwr On Password” in Common screen (Table 4-7). Password entry is required regardless of the Pwr On Password setting. When a matched 2-tone is received, scan is set to the following condition that is programmed:

Null Cancel Start -

See also “Scan” key in Table 4-2 and “Power On Scan” in Table 4-5.

One high beep once.

T w o high beeps once.

One high and one low beep three times.

One high beep repeated at selected intervals.

Two high beeps repeated at selected intervals.

The transceiver can be used continuously.

The transceiver cannot be used. Reprogramming is required to re-activate the transceiver.

The power-on password prompt is displayed. To use the transceiver, the correct password must be

Scan condition is not affected.

Scan is cancelled.

Scan is started.

Parameter Description

Rx Code Common Screen

Notone

Timer

Group

Timer

EXO Timer

Beep Repeat

Timer

Auto Tx

Timer

Code Type

1st/2nd Tone

Frequency

1st/2nd Tone

Period

This item sets the acceptable period between 2 tones. When received tones are interrupted for longer than this setting, the transceiver does not detect the code.

Programs the 2-tone decoding period in seconds. When the received tone is longer than this setting, the transceiver detects the tone as a group code.

When the EXO function is programmed “On” (see EXO abo ve), the horn drive out pin of the o ptional accessory cable is grounded for this period when receiving a matched 2-tone code. When “Repeat” is selected for the above “Beep” parameter, beeps are repeated at this period in seconds.

When the Auto TX function above is programmed “On”, the transceiver transmits for this set period when receiving a matched 2-tone code.

Tx Code Screen

Selects the “Individual” or “Group” code type. Sets the frequencies for the first and second tones from 250-3300 Hz. The closest tone is selected.

Sets the period of the first and second tones.

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Table 4-7 Common Screen Description

Parameter Description

User

Password

Program

Comment

AF Min

Level

SQL Level

Rx AF Switch

Auto Reset

Timer A/B

Inactive

Timer

TOT

Timer

TOT Penalty

Timer

TOT ID Out

TOT Beep

Lockout

Penalty

Timer

CTCSS Reverse

Burst

Programs the password that must be entered at power on if the following “PWR ON Password” parameter is “On” or to cancel the “STUN” cond itio n describ ed in Table 4-6. Any four-di git number f rom 0000-9 999 can be programmed. The password is entered as described in Section 3.3.2. Allows a comment to be programmed in the file for use in quickly identifying the contents of a transceiver. When a transceiver is connected to the computer , the comment can be check ed without reading all p rogrammed data by selecting “Information” in the Program menu (see Section 4.4.4). Sets the minimum audio level that can be selected by the user. The level can be set in 32 steps with 0 the lowest level. This setting can be overridden by pressing the F1 in the power-on menu (see Section 3.3.4).

Sets the squelch level in up t o 25 5 st ep s (0 set s th e maxi mu m uns qu elched l evel). This adjustment can be more accurately made by pressing F4 in the power-on menu (see Section 3.3.4). This parameter can be used to disable the high-pass filter that removes the Call Guard (CTCSS/DTCS) signal from the audio. It should be programmed “On” if Call Guard squelch is used.

These timer settings are used by the “Auto Reset” parameter in the channel screen (see Table 4-1). These times set the delay in returning to the mute mode or “Po wer On Scan” after receiving a message or press ing a key. To disable the Auto Reset function, set one of these timers to “Off ” (0) and select it in the channel screen. This feature is available with the PMR (European) mode only. It sets the time in seconds to return to the “Inaudible” mode after the “Audible” mode is selected. To turn off the inactive timer function, do not assign “Inactive” in the channel screen.

Programs the time-out timer time in seconds. If the transmitter is keyed continuously for longer than this time, the transmitter is disabled. The time-out timer is enabled or disabled for each channel by the TOT parameter in the channel screen (see Table 4-1). This programs the time in seconds that the transmitter is disabled by the time-out timer. The transmitter cannot be keyed again until this time expires.

If this parameter is enabled, an DTMF ID code is automatically transmitted just before the time-out timer disables the transmitter. This ID code is set on the Log/ID line of the DTMF Autodial screen (see Table 4-3). If this parameter is enabled, warning beeps are transmitted 10 seconds before time out occurs.

This is the time that the transmitter is disabled if the user attempts to transmit while in the lockout (Transmit Disable On Busy) condition. Transmitting is disabled for the Lockout Penalty Time even if the lockout condition is cleared. The lockout feature is programmed on the channel screen (see Table 4-1).

If CTCSS (tone Call Guard) signaling is programmed on the channel, this sets the length of the reverse burst that is transmitted when the P TT switch is released . The reverse burst prevents the “squelch tail” (n oise burst) in the transceiver receiving the signal.

PROGRAMMING

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Table 4-7 Common Screen Description (Continued)

Parameter Description

Power On

Password

Dealer

Passcode

Set Mode

Access

Transceiver

Data Out

This turns the password function on and o ff. When it is turned on, “PWoRd” is displayed when power is turned on and a four-digit password must b e entered to en able the trans ceiver ( see Section 3.3 .2) . The password is programmed in “User Password” above. If the STUN function disables the transceiver (see Table 4-6), password input is required even if this parameter is programmed “Off”. Specifies the six-digit code that must be entered to access the following dealer set mode.

This enables/disables the Dealer Set Mode which allows one transceiver to clone another with identical information. If the transceiver will not be used for cloning, the dealer set mode is not used and this parameter should be programmed “Inhibit”. Enables or inhibits the do wnloadin g of transcei ver prog ramming dat a using the pr ogrammi ng sof tware or w hen programming one transceiver with another (cloning). This prevents the unauthorized duplication of programming data. This does not inhibit overwriting of programming data, so reprogramming is still possible with this enabled.

Table 4-8 Expert Screen Description

Parameter Description

Fast Scan

Timer

Slow Scan

Timer

Tx DTCS

Inverse

Rx DTCS

Inverse

User CTCSS

Freq.

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Sets the period in seconds that each channel not programmed for CTCSS/DTCS (Call Guard) squelch is scanned. NOTE: An appropriate time is set by default and if a time less than the default is programmed, busy

channels may not be detected.

Sets the period in seconds that each channel programmed for CTCSS/DTCS (Call Guard) squelch is scanned.

NOTE: An appropriate time is set by default and if a time less than the default is programmed, busy channels may not be detected.

Selecting “Inverse” selects the opposite transmit digital DTCS (Call Guard) code polarity specified for the channel (see Table 4-1) and selecting “Normal” does not change that setting. For example, if the channel is pro grammed “I” (inverse), selecting “Inverse” here results in “Normal” DTCS. For DTCS signaling to work properly, the polarity of the code in the transmitting and receiving transceivers must be the same. Functions the same as the preceding “Tx DTCS Inverse” parameter to change the receive DTCS polarity.

A non-standard CTCSS (Call Guard) tone from 60 .1-300.1 Hz can be programmed. It is then selected by programming “USER” for the CTCSS code in the channel screen (see Table 4-1).

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Table 4-8 Expert Screen Description (Continued)

Parameter Description

Emer Sw

On Timer

Emer Sw

Off Timer

Emer

Start/Repeat

Rx EXO

PTT

EXPTT

Delay Timer

Tone Mute

EXPTT

Low Beep

Frequency High Beep

Frequency

Character

Editor

Sets the period in seconds that the Emergency function key must be p ressed to activate the emer gency f unction. An emergency call is initiated by pressing the Emergency key for longer than this time.

Sets the period in seconds that the Emergency function switch must be pressed to cancel an emergency call. This must be done before the call is transmitted because once it is transmitted, it cannot be canceled.

Programs the delay and interval period in seconds for emergency calls. When the emergency switch is pressed and held, the emergency call is transmitted after this delay period. If the Emergency Repeat function key is programmed (see Table 4-2), the transceiver then transmits repeatedly at this interval until an “Emergency Cancel” code is received.

Sets the condition of the horn output (pin 6) of the optional accessory cable in the receive mode. OFF = Horn drive control out, ON = Send (to ground when signal is received). One use of the “ON” condition may be for some type of simplified repeater system. When Rx EXO is programmed “On”, pin 6 of the optional accessory cable is grounded for this period when receiving a signal. Normally this parameter is set to “0”.

Sets the period that the transmitter stays on after the receive signal disappears.

Enables or disables the CTCSS/DTCS (Call Guard) function with an external PTT signal. “On” disables and “Off” enables CTCSS/DTCS.

Sets the low beep tone frequency for 400 - 2998 Hz. The nearest available frequency is automatically selected.

Sets the high beep tone frequency for 400 - 2998 Hz. The nearest available frequency is automatically selected.

Special characters can be designed using this function by enabling the available 14 segments in any combination desired. The special characters created then can b e entered when programming the “Text” parameters in the various screens. Up to 16 characters can be programmed and stored in locations A-P. To enter a special character when programming text, press the PgUp or PgDn keys to scroll through and select the desired character. Special characters can be displayed in positions 3-7 (1 and 2 must be standard characters).

PROGRAMMING

4.5 UNIQUE PMR (EUROPEAN) SCREENS

4.5.1 GENERAL

Selecting LMR or PMR in the Model menu (see Section 4.4.6) affects what parameters are displayed in some scree ns and also w hat additional screens a re displayed. Basically, selecting the LMR (U.S.A.) model displays parameters for the 2-tone option, and selecting PMR (European) displays parameters for the 5-tone option.

NOTE: Optional 2/5-Tone Kit, Part No. 585-7500026, is required to have the 5-tone function.

4.5.2 UNIQUE PMR SCREENS

The following menus and screens are different for LMR and PMR models:

Screen Menu -

The LMR menu is described in Sec-

tion 4.4.3, and the PMR version is shown below.

Memory Channel Screen -

The LMR version of this screen is shown in Table 4-1, and the PMR version is shown in Figure 4-2. Refer to on-line help for information on unique PMR parameters (press F1 with the parameter highlighted).

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PROGRAMMING

The following screens selected in the preceding Screen menu are unique to PMR models. Refer to online help for information on parameters in these screens.

Rx Code Channel - This screen is shown below and it programs the receive 5-tone code information.

Tx Code Channel - This screen i s shown below an d it programs the transmit 5-tone code information.

4.6 CLONING (PROGRAMMING ONE TRANSCEIVER WITH ANOTHER)

One transceiver can be used to program another with identical data. Replication Cable, Part No. 5972002-200 is required to connect the transceivers together (see Table 1-1). The master (source) transceiver must have the following Common screen (see Table 4-7) parameters programmed to perform cloning:

•

T ransmit Data Out = Enabled. If this parameter is not enabled, the transceiver does not go into the clone mode. The programming of this parameter does not af fect the abi lity to receiv e data. Therefo re, it can be in e ither mode in the slave (target) transceiver.

•

Set Mode Access = Enabled. This must be programmed to allow the Dealer Set mode to be accessed so that cloning can be enabled.

•

Dealer Pa sscode. This six-digit code must be known to enable the Dealer Set mode.

User Tone Format - This screen is shown below and it programs special tone frequencies and the 5-tone format information.

Proceed as follows to program one transceiver with another:

1. Select the Dealer Set mode in the Master (source)

transceiver by tur ni ng p ower on with the F1 and up

key pressed.

2. The display then indicate s “DEALR” which is the

prompt to enter the six-d igit Dealer Pa sscode. Enter this code using the F1-F4 and down key. The numbers represented by each key are as follows. When the correct number is ente red, “SETMODE is displayed. If six digi ts have been ent ered and thi s is not displayed, an incorrect number may have been entered. Repeat starting with step 1. Refer to Section

3.3.2 for more informatio n.

Key

Number Entered

0 5

1 6

2 7

3 8

4 9

3. Press the F4 key to select the clone mode. The

display should indi cate “CLONE”.

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PROGRAMMING

4. Connect the master transceiver to the slave (target) transceiver by plugging the cloning cable into the microphone jack of each.

5. Turn the slave transceiver on. Then momentarily press the POWER switch of the master transceiver to begin the data transfer.

6. When cloning is complete, CLONE is dis playe d by the master and CLONE OK by the slave.

7. To clone another transceiver, repeat this procedure starting with step 4.

8. T o r eturn both the t ransce iv ers t o norm al o perat ion, reconnect the microphone and cycle power. .

Figure 4-2 Memory Channel Screen (PMR Models)

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VHF (7610) CIRCUIT DESCRIPTION

SECTION 5A VHF (7610) CIRCUIT DESCRIPTION

NOTE: A VHF transceiver block diagram is located on page 8-1.

5.1 VHF RECEIVER CIRCUIT

5.1.1 ANTENNA SWITCHING CIRCUIT

The antenna switching circuit functions as a lowpass filter whil e receiv ing and a r esonat or circui t while transmitting. This prevents the transm it signal from entering the receiver in the transmit mode.

Received signals enter the antenna connector and pass through a low-pass filter consisting of L1-L3, C1C3, C8-C10, and C11-C13. The filtered signal is then fed through a quarter-wave type antenna switching circuit formed by D13, D14, and L13 and applied to the receiver RF circuit.

5.1.2 RF CIRCUIT

The RF circuit amplifies the frequen cies that are within the receive band range and attenuates out-ofband signals.

The signal from the antenna switching circuit passes through attenuator D13/D14. The attenuator circuit functions only when the attenuator function is assigned to a programmable key. It is enabled to minimize RF amplifier distortion caused by excessively strong receive signals.

When the attenuator function is turned on, CPU IC1, pin 32 switches the voltage level of the “RF ATT” line from high to low and then controls the attenuator switch Q35. The D13/D14 current then increases and D13/D14 act as an attenuator.

This signal is then applied to a two-stage tunable bandpass filter controlled by D16 and D17. The filtered signals are amplified by RF amplifier Q12 and applied to another two-stage bandpass filter controlled by D18-D21. These filters at tenuate unwanted signals. The filtered signal is then applied to the fi rst mixer Q13.

The tunable bandpass filters controlled by D16D21 employ varactor diodes to tune them to the center

frequency of the RF passband. This gi ves a wide bandwidth receiver good image response rejection. The diodes are controlled by the CPU IC1 via level controller IC5.

5.1.3 FIRST MIXER AND FIRST IF CIRCUITS

The first mixer circuit converts the received signal to a fixed frequency fi rst IF signal of 31.050 MHz. The RF signal from the bandp ass fi lter is applied to th e first mixer Q13. This sig nal is mixed with the first LO signal from VCO Q7/Q8 and buffers Q6-Q4 to produce the IF signal.

The 31.050 MHz first IF signal then passes through a pair of crystal filters (FI1A/B) which suppress out-of-band signals. The filtered signal is then amplified by first IF amplifier Q14 and applied to second IF circuit IC3.

5.1.4 SECOND IF AND DEMODULATOR

CIRCUITS

The second mixer circuit converts the 31.050 MHz first IF signal to a 450 kHz second IF signal. A double-conversion superheterodyne receiver like this improves the image rejection ratio and provides a stable receiver gain.

FM IF system IC3 contains second mixer, limiter amplifier, quadra ture detector, active filter and noise amplifier circuits (see F igure 5-1). The first IF signal from IF amplifier Q14 is applied to IC3, pin 16 whic h is the input to the second mixer section. The 31.050 MHz first IF signal is mixed with the 30.600 MHz second LO signal to produce the 450 kHz second IF signal. The PLL reference frequency of 15.300 MHz is doubled to produce the 30.60 0 MHz second LO signal .

The second IF signal is fed out of IC3 on pin 3 and applied to ceramic filters FI3 and FI4 with nar ro w band operation or only FI4 with wideband operation (bypassing FI3). It is then fed back into IC3 on pin 5 and applied to the limiter amplifier and quadrature detector. The quadrature detector demodulates the audio signal contained in the second IF signal. Components connected to pins 10 and 11 including X3

5A-1

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VHF (7610) CIRCUIT DESCRIPTION

Figure 5-1 Second IF System IC3 (VHF)

Figure 5-2 Audio Switch ing and Amplifier Circuit (VHF)

are part of the quadrature detector. The audio signal is fed out on pin 9 (IC3) and applied to the AF amplifier circuit.

5.1.5 AUDIO AMPLIFIER CIRCUIT

The AF (audio frequency) amplifier circuit provides drive to the speaker ( a block dia gram is shown i n Figure 5-2). The audio signal from IC3, pin 9 is applied to AF amplifier IC7A and then fed to pin 1 of AF switching circuit IC4. The switched output signal on IC4, pin 2 is then applied to high-pass filter IC8A/ B. The cut-off f requency of this filter is controlled by the “AFHPF” line. When “AFHPF” is high , the cut-of f frequency is shifted higher to attenuate the Call Guard (CTCSS or DTCS) signals.

The filtered output signal on IC8, pin 7 is applied to limiter IC7b and buffer IC7c. De-emphasis is pro-

vided by R145 and C182. The audio signal is then applied to pin 16 of level controller IC5. This device allows the C PU to control the speaker volume level. The level controlled signal is fed out of IC5 on pin 15 and applied to low-pass filter IC6b. It is then applied to AF switching circuit IC4 on pin 8, and the switched output is on pin 9. This signal is buffered by IC6d and then amplified by AF amplifier IC10 to provide drive to the speaker.

5.1.6 RECEIVER MUTE CIRCUIT

Noise Squelch

The noise squelch circuit turns off the audio signal when no RF signal is being received. The squelch circuit is controlled by the amount of noise present in the audio signal.

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VHF (7610) CIRCUIT DESCRIPTION

Part of the AF signal from pin 9 of FM IF circuit IC3 is applied to pin 24 of level controll er IC5. This device allows the CPU to control t he squelc h thres hold level. The level-controlled output signal on pin 23 is applied to IC3, pin 8 which is the input of an internal filter (see Figure 5-1). Noise frequencies of about 10 kHz are passed and then fed out on pin 7 and also applied to an internal noise detector.

The detected noise signal is rectified and fed out on pin 13 witho ut s moo thi ng. The noise signal (NOIS) is then applied to pin 19 of CPU IC1. The CPU analyzes the noise condition and outputs the RMUT signal via I/O expander IC11. This signal controls AF mute switches IC4a and c (see Figure 5-2).

Call Guard (CTCSS/DTCS) Operation

The tone Call Guard squelch circuit detects AF signals and opens the squelch only when receiving a signal containing a matching subaudible tone or code (CTCSS or DTCS). When tone squelch is in use and a signal with a mismatched or no subaudible tone is received, the tone squ elch ci rcuit mutes the AF signa ls even when noise squelch is open.

A portion of the audi o s ign al fr om amplifier IC7a passes through low-pass filter Q5 in the front unit to remove voice signals . It is then applied to CPU IC1 on pin 97 via the “CTCIN” line. The CPU detects the CTCSS or DTCS signaling and controls the AF mute switch via I/O expander IC11.

5.2 VHF TRANSMITTER CIRCUIT

5.2.1 MICROPHONE AMPLIFIER CIRCUIT

The microphone amplifier circuit amplifies the microphone audio signal to the level required by the modulation circuit and also provides pre-emphasis.

The signal is then fed to IC7b and IC7c which provide buffering and amplification. Deviation limiting is then provided by level controller IC5. The input to this device is pin 16 and the output is pin 15. The signal is then fed to splatter filter IC6b and switch IC4. The input is on pin 11 and the outp ut is on pin 10. The modulation signal is then applied to the PLL circuit as “MOD”.

Narrow band/wideband switch Q21 is connected to the input of the splatter filter IC6b and switched by the “NWC” signal from the I/O expander IC11. When “NWC” is high, Q21 shifts the filter cut-off frequency for narrow band deviation selection.

5.2.2 MODULATION CIRCUIT

The microphone audio signal modulates the frequency of VCO Q7/Q8. The “MOD” signal from switch IC4, pin 10 changes the reactance of diode D9 which frequency modulates the VCO frequency. The modulated VCO signal is amplified by buffer amplifiers Q6, Q5, and Q4 and applied to the transmit driver circuit.

5.2.3 TRANSMIT DRIVER CIRCUIT

The transmit driver circuit amplifies the VCO oscillating signal to the level required by the power amplifier module. The RF sig nal fr om buf f er ampl if ier Q4 passes through the T/R switch D5 and is amplified by the buffer-a mplifier s Q3 and Q2 and driver Q1. Th e signal is then applied to the power amplif ie r mod ule IC1.

5.2.4 POWER AMPLIFIER MODULE

The power amplifier module amplifies the driver signal to the output power level. The RF signal from the driver Q1 is applied to the power module which produces 45 watts of out put power at the antenna jack.

The microphone audio signal is amplified by IC7d, with R172 and C295 on the output providing pre-emphasis. The microphon e audio sign al is then fed to switch IC4 on pin 4 and the switched output signal is on pin 3. This signal is then applied to high-pass filter IC8a/b which attenuates frequencies in the Call Guard (CTCSS/DTCS) range. This is the same filter used for receive audio filtering.

The amplified signal is fed through antenna switching circuit D3 and D4, a low-pass filter and APC detector, and is then applied to the antenna jack. The collector voltage of driver Q1 and the control voltage on pin 2 of the power module IC1 come from APC transistors Q17 and Q18. Trans mit swit ch Q23 turns off Q17 and Q18 when the transmitter is disabled.

November 1998

5A-3

Part No. 001-7600-001

VHF (7610) CIRCUIT DESCRIPTION

Figure 5-3 PLL Circuit (VHF)

5.2.5 APC CIRCUIT

The APC (Automatic Power Control) circuit protects the power amplifier from damage caused by a mismatched antenna l oad, and provides a stable power output.

Detector D2 detects forward signals, and D1 detects reverse signals. The combined voltage is at minimum level when a matched antenna load of 50 ohms is present and then increases as it becomes mismatched. The detected voltage is applied to pin 9 of inverse amplifier IC6c. Power setting voltage T4 is applied to the other input (pin 10) as a reference.

When antenna impedance is mismatched, the detected voltage exceeds the power setti ng voltage. The output voltage on pin 8 then decreases which turns Q18 off slightly. Q17 then turns off slightly and lowers the voltage applied to the collector of Q1 and the power control i nput of I C1. This re duces the output power produced by thes e devices.

5.3 VHF PLL CIRCUIT

5.3.1 PLL CIRCUIT

The PLL (Phase-Locked-L oop) ci rc uit pr ovides a stable (± 5 PPM) receive first injection and transmit frequency. The PLL circuit consists of PLL circuit IC2, a loop filter, and reference oscillator. A block diagram of the PLL circuit is shown in Figure 5-3.

The signal from VCO (Voltage-Controlled Oscillator) Q7/Q8 is buffered by Q6 and Q5 and then applied to pin 2 of IC2. The prescaler in IC2 divides the VCO signal down so that i t i s wi th in the frequency range of the programmable counter.

A reference frequency generated by reference oscillator and cont rolled by cryst al X1 is appl ied to pi n 15 of IC1. This signal is divided down by a programmable divider and provides the reference input to the phase detector. When the VCO is oscillating at the correct frequency, the VCO-derived input to the phase detector is the same frequency as the reference input.

November 1998 Part No. 001-7600-001

5A-4

VHF (7610) CIRCUIT DESCRIPTION

The phase detector determines the phase difference between these signals and then produces output pulses on pin 8 which are filtered by the loop filter. This filter consists of R43-R45, C60, and C61. The output of this fi lter is the DC contr ol voltage applied t o the VCO. The phase detector increases or decreases this control voltage to change the VCO frequency.

5.3.2 VCO CIRCUIT

The VCO signal is amplified by buffer amplifiers Q6 and Q4 and is then applied to T/R switch D5 and D6. The VCO receive injection signal is applied to first mixer Q13 via bandpass filter L23, L24, and C116-C118. Likewise, the VCO transmit signal is applied to driver Q1 via buffer amplifiers Q2 and Q3. Part of the Q6 output signal is fed back to PLL IC2 as described in the preceding section.

5.4 VHF IC PIN DESCRIPTIONS

5.4.1 VHF POWER SUPPLY

Line Description

VCC Unswitched input voltage to the transceiver.

HV VCC supply voltage switched by Q25 and Q26.

When the [POWER] switch is pressed, the CPU outputs the “PWON” control signal to this circuit to turn the HV supply on.

CPU5V Common 5V supply for the CPU produced from

the VCC supply by CPU5V regulator IC9. The circuit outputs this voltage regardless of the transceiver on-off condition.

8V Common 8V supply produced from the HV

supply by 8V regulator Q36.

5V Common 5V supply produced from the VCC

supply by 5V regulator Q29/Q30.

R5 Receive 5V supply produced by R5 regulator

Q27 using the “T5C” signal from I/O expander IC IC11.

T5 Transmit 5V supply controlled by T5 regulator

Q28 using the “T5C” signal from I/O expander IC11.

5.4.2 VHF CPU IC1 PORT ALLOCATION

Pin No.

1 VIN Input port for overvoltage detection from

12 SCK Outputs clock signal to EEPROM IC3,

13 SI Input port for the data signal from

14 SO Outputs data signal to E EPROM IC3 , PLL

16 CLIN Input port for cloning signal. 17 CLOUT Output port for cloning signal. 18 POSW Input for the POWER switch. Low =

19 NOIS NOIS signal input port from the FM IF

26 PTT Input port for the PTT switch. Low = PTT

32 RF ATT Outputs RF attenuator control sign al to the

36 UNLK Input port for PLL unlock signal from the

37 PWON Outputs control signal for the power

38 DIM Outputs control signal for LCD backlight.

39 EXTPTT Input port for the PTT switch from exter-

40 DIM Input port for the LCD backlight control

41 PLST Outputs strobe signals for PLL IC2 (main

42 DAST Outputs strobe signals for level controller

43 EXST Outputs strobe signals for the I/O

45, 46KS1,

47-50KR3-

Port

Name

KS2

KR10

Description

the vehicle power source.

PLL IC2 (main unit) and expanders IC5, IC11 (main unit), etc.

EEPROM IC3, etc.

IC2 (main unit) and expanders IC5, IC11 (main unit).

POWER switch pushed.

IC3 (main unit) for noise squelch operation.

switch pushed.

attenuator switch (Q35 on main unit). Low = Attenuator function on.

PLL IC2 (main unit). High = unlock.

switching circuit (Q25 on main unit) and 5V regulator Q29, Q30 (main unit ).

Low = LCD backlight on.

nal connector J3 (main unit). Low = External PTT switch on.

signal from external connector J3 (main unit). Low = External dimmer switch on.

unit).

IC5 (main unit).

expander IC11 (main unit). Output ports for the key matrix.

Input ports for the key matrix.

5A-5

November 1998

Part No. 001-7600-001

VHF (7610) CIRCUIT DESCRIPTION

Pin No.

51 BM Outpu ts control signal for beep mute cir-

52-54CTDA0-

55 HANG Input port for the microphone hanger

90 MTONE Output port for beep audio while receiving

91 TONED Outputs DTMF signa l s. 94-96OPV3-

97 CTCIN Input port for the CTCSS/DTCS IN

98 SD Input port for S-meter signal. 99 LVIN Input port for PLL lock voltage. 100 TEMP Input port for the transceiver’s internal

Port

Name

CTDA2

OPV1

Description

cuit Q10. High = Beep muted. Output port for CTCSS/DTCS signals.

detection signal. Low = Microphone on hook.

and 2/5 tone signals while transmitting.

Input port for option connector J2 state (main unit).

decode signals.

temperature.

5.4.3 VHF I/O EXPANDER IC5 (MAIN UNIT)

Pin No.

Port

Name

Description

5.4.4 VHF P ORT EXPANDER IC11 (MAIN UNIT)

Pin No.

4 T5C Outputs control signal for T5 and R5 regu-

5 TMUT Outputs Tx mute switch Q19, Q23 (main

6 RM Outputs AF mute switch IC4 (main unit)

7 MM Outputs MIC mute control signal. High =

11 HORNO Outputs external device control signal.

12 AFON Outputs control signal for the AF amplifier

13 AFHPF Outputs AF filter control signal. High =

14 NWC Outputs receive/transmit passband width

Port

Name

Description

lator circuits Q27, Q28 (main unit). High = Transmitting.

unit) control signal. High = Tx muted.

control signal for the receiver circuit. High = No receive audio is emitted.

DTMF signals are output, etc.

High = Matched 2/5-tone signals are received.

regulator circuit. High = Squelch is open, etc.

Filter out CTCSS or DTCS frequency.

control signal. High = Narrow bandwidth is selected.

2, 3, 10T1-T3 Output tunable bandpass filter control

signals.

11 T4 Output port for tunab le band pas s f ilter

control signal while receiving and power control signal while transmitting.

14 REF Output port for ref erence frequency

control voltage.

November 1998 Part No. 001-7600-001

5A-6

UHF (7640) CIRCUIT DESCRIPTION

SECTION 5B UHF (7640) CIRCUIT DESCRIPTION

NOTE: The UHF transceiver bl ock diagram i s locate d on page 8-6.

5.5 UHF RECEIVER CIRCUIT

5.5.1 ANTENNA SWITCHING CIRCUIT

The antenna switching circuit functions as a lowpass filter w hile receiving and a resonator circuit while transmitting. This prevents the transmit signal from entering the receive r in the transmit mode.

Received signals ent er th e antenna connector and pass through a low-p ass filt er consi sting of L 1-L3, C1, C2, and C9-C12. The filtered signal is then fed through a quarter-wave type antenna switching circuit formed by D4, D5, and L15 and applied to the receiver RF circuit.

5.5.2 RF CIRCUIT

The RF circuit amplifies the frequen cies that are within the receive band range and attenuates out-ofband signals.

The signal from the antenna switching circuit passes through attenuator D4/D5. The attenuator circuit functions only when the attenuator function is assigned to a programmable key. It is enabled to minimize RF amplifier distortion caused by excessively strong receive signals.

When the attenuator function is turned on, CPU IC1, pin 32 switches the voltage level of the “RF ATT” line from high to low and then controls the attenuator switch Q1. The D4/D5 current then increases and D4/D5 act as an attenuator.

This signal is then applied to a two-stage tunable bandpass filter controlled by D7 and D8. The filtered signals are amplified by RF amplifie r Q2 and applied to another two-stage bandpass filter controlled by D9 and D10. These filters attenuate unwanted signals. The filtered signal is then applied to the fi rst mixer Q3.

The tunable bandpass filters controlled by D7D10 employ varactor diode s to tune t hem to the cente r frequency of the RF passband. This gives a wide bandwidth receiver good image response rejection. The diodes are controlled by the CPU IC1 via level controller IC12.

5.5.3 FIRST MIXER AND FIRST IF CIRCUITS

The first mixer circuit converts the received signal to a fix ed fr equency first IF signal of 46.350 MHz. The RF signal from the bandpass filter is applied to the first mixer Q3. This signal is mixed with the first LO signal from VCO Q23 and buffe rs Q28 and Q30 to produce the IF signal.

The 46.350 MHz first IF signal then passes through a pair of crystal filter s (FI1A/ B) which suppress out-of-band signals. The filtered signal is then amplified by first IF amplifier Q4 and applied to second IF s ystem IC1.

5.5.4 SECOND IF AND DEMODULATOR

CIRCUITS

The second mixer circuit converts the 46.350 MHz first IF signal to a 450 kHz second IF signal. A double-conversion superheterodyne receiver like this improves the image rejection ratio and provides a stable receiver gain.

FM IF system IC1 contains seco nd mixe r, limiter amplifier, quadrature detect or, active filter and noise amplifier c ircuits (see Figure 5-4). The first IF signal from IF amplifier Q4 is applied to IC1, pin 16 which is the input to the se cond mixer section. The 46.350 MHz first IF signal is mixed with the 45.900 MHz second LO signal to produce the 450 kHz second IF signal. The PLL reference frequency of 15.300 MHz is tripled to produce the 45.900 MHz second LO signal.

The second IF signal is fed out of IC1 on pin 3 and applied to ceramic filters FI2 and FI3 with nar row band operation or only FI2 with wideband operation (bypassing FI3). It is then fed back into IC1 on pin 5

5B-7

November 1998

Part No. 001-7600-001

UHF (7640) CIRCUIT DESCRIPTION

Figure 5-4 Second IF System IC1 (UHF)

Figure 5-5 Audio Switching and Amplifier Circuit (UHF)

and applied to the limiter amplifier and quadrature detector. The quadrature detector demodulates the audio signal contained in the second IF signal. Components connected to pins 10 and 11 including X1 are part of the quadrature detector. The audio signal is fed out on pin 9 (IC1) and applied to the AF amplifier circuit.

5.5.5 AUDIO AMPLIFIER CIRCUIT

The AF (audio frequency) amplifier circuit provides drive to the speaker (s ee block diagr am in Figure 5-5). The audio signal from I C1, pin 9 i s appl ied t o AF amplifier I C7b and then fed to high-pass filter IC6c/ IC6d. The cut-off frequency of this filter is controlled by the “AFHPF” line. When “AFHPF” is high, the cut-off frequency is shifted higher to attenuate the Call Guard (CTCSS or DTCS) signals.

The filtered output signal on IC6d, pin 14 is applied to pin 8 of AF switching circuit IC11. The switched output signal on IC11, pin 9 is then applied to pin 16 of level controller IC12. This device allows the CPU to control the speaker volume level. The volume controlled output on pin 15 is then applied to pin 2 of AF switching circuit IC11. The switched output on pin 1 is applied to pin 4 of de-emphasis circuit IC4a. The signal is then amplified by IC9 to provide drive to the speaker.

5.5.6 RECEIVER MUTE CIRCUIT

Noise Squelch

The noise squelch circuit turns off the audio signal when no RF signal is being received. The squelch circuit is controlled by the amount of noise present in the audio signal.

November 1998 Part No. 001-7600-001

5B-8

UHF (7640) CIRCUIT DESCRIPTION

Part of the AF signal from pin 9 of FM IF circuit IC1 is applied to pin 24 of level controller IC12. This device allows the CPU to control t he squelc h thres hold level. The level-controlled output signal on pin 23 is applied to IC1, pin 8 which is the input of an internal filter (see Figure 5-4). Noise frequencies are passed and then fed out on pin 7 and also applied to an internal noise detector.

The detected noise signals are rectified and fed out on pin 13 without smoothing. The noise signal (NOIS) is then applied to pin 19 of CPU IC1. The CPU analyzes the noise condition and outputs the RMUT signal via I/O expander IC13. This signal controls AF mute switch IC11a (see Figure 5-5).

Call Guard (CTCSS/DTCS) Operation

A portion of the audio signal f rom amplif ier IC7b passes through low-pass filter Q5 in the front unit to remove voice signals . It is then applied to CPU IC1 on pin 97 via the “CTCIN” line. The CPU detects the CTCSS or DTCS signaling and controls the AF mute switch via I/O I/O expander IC13.

The output signal from IC11 on pin 10 is fed to pin 16 of level controller IC12. This device provides deviation control and is also used in the receive mode to provide volume control . The level controlled output on pin 15 is fed to pin 3 of switching circuit IC11. T he switched output (MOD) on pi n 4 is then applied to the PLL circuit (D21) where it frequency modulates the transmit si gnal.

Narrow band/wideband switch Q35 is connected to the input of the splatter filter IC7a and switched by the “NWC” signal from the I/O expander IC13. When “NWC” is high, Q35 shifts the filter cut-off frequency for narrow band deviation selection.

5.6.2 MODULATION CIRCUIT

The microphone audio signal modulates the frequency of transmit VCO Q25. The “MOD” signal from switch IC11, pin 4 changes the reactance of diode D21 and this modulates the frequency of transmit VCO Q25. The modulated VCO signal is amplified by buffer amplifiers Q28 and Q30 and applied to the transmit driver circuit (Q21).

5.6.3 TRANSMIT DRIVER CIRCUIT

The transmit driver circuit amplifies the VCO oscillating signal to the level required by the power amplifier module. The RF sig nal fr om buf f er ampl if ier Q30 passes through the T/R switch D18 and is amplified by the buffer amplifiers Q21, Q20, and driver Q19. The signal is then applied to the power amplifier module IC5.

5.6 UHF TRANSMITTER CIRCUIT

5.6.1 MICROPHONE AMPLIFIER CIRCUIT

The microphone amplifier circuit amplifies the microphone audio signal to the level required by the modulation circuit and also provides pre-emphasis.

The microphone audio signal is amplified by IC8b and limited by IC8a. Pre-emphasis is provided by R152 and C180. The signal is then fed to splatter filter IC7a and then to pin 11 of switching circuit IC11.

5.6.4 POWER AMPLIFIER MODULE

The power amplifier module amplifies the driver signal to the output power level. The RF signal from the driver Q19 is applied to the power module which produces 35 watts of out put power at the antenna jack.

The amplified signal is fed through antenna switching circuit D3, a low-pass filter and APC detector, and is then applied to the anten na jack. The collector voltage of driver Q19 and the control voltage on pin 2 of the power module IC5 come from APC transistors Q17 and Q18. Transmit switch Q16 turns off Q17 and Q18 when the transmitter is disabled.

November 1998

5B-9

Part No. 001-7600-001

UHF (7640) CIRCUIT DESCRIPTION

Figure 5-6 PLL Circuit (UHF)

5.6.5 APC CIRCUIT

The APC (Automatic Power Control) circuit protects the power amplifier from damage caused by a mismatched antenna load, and provides a st able power output.

One diode in D1 detects forward signals and the other detects reverse signals. The combined voltage is at minimum level when a matched antenna load of 50 ohms is present and then increases as it becomes mismatched. The detected voltage is applied to pin 6 of inverse amplifier IC4b. Power setting voltage T4 is applied to the other input (pin 5) as a reference.

When antenna impedance is mismatched, the detected voltage exceeds the power setti ng voltage. The output voltage on pin 7 then decreases which turns Q17 off slightly. Transistor Q18 then turns off slightly and lowers the voltage applied to the collector of Q19 and the power control input of IC5. This reduces the output pow er produced by these devices.

5.7 UHF PLL CIRCUIT

5.7.1 PLL CIRCUIT

The PLL (Phase-Locked-Loop ) circuit provides a stable (± 2.5 PPM) receive first injection and transmit frequency. The PLL circuit consists of PLL circuit IC2, a loop filter, and reference oscillator. A block diagram of the PLL circuit is shown in Figure 5-6.

The signal from VCOs (Voltage-Controlled Oscillator) Q23 and Q25 is buffered by Q28 and Q29 and then applied to pin 2 of IC10. The prescaler in IC10 divides the VCO signal down so that it is within the frequency range of the programmable counter.

A reference frequency generated by reference oscillator X2 is applied t o pin 15 of IC1. This signa l is divided down by a programmable divider and provides the reference input to the phase detector. When the VCO is oscillating at the correct frequency, the VCO-derived input to the phase detector is the same frequency as the refere nce input.

November 1998 Part No. 001-7600-001

5B-10

UHF (7640) CIRCUIT DESCRIPTION

The phase detector determines the phase difference between these signals and then produces output pulses on pin 8 which are filtered by the loop filter. This filter consists of Q34, R180, R181, and C202C204. The output of this filter is the DC control voltage applied to the VCO. The phase detector increases or decreases this control voltage to change the VCO frequency.

5.7.2 VCO CIRCUIT

Separate receive and transmit VCOs are used. The receive VCO consists of Q23/D20/D34 and the transmit VCO consists of Q25/D22/D33. The signal from these VCOs is amplified by buffer amplifiers Q28 and Q29 and is then applied to T/R switch D18 and D19. The VCO receive injection signal is applied to first mixer Q3, and the VCO transmit signal is applied to driver Q21. Part of the Q28 output signal is amplified by Q29 and fed back to PLL IC10, pin 2 as described in the preceding section.

5.7.3 UHF POWER SUPPLY

Line Description

VCC Unswitched input voltage to the transceiver.

HV VCC supply voltage switched by Q14 and Q15.

When the [POWER] switch is pressed, the CPU outputs the “PWON” control signal to this circuit to turn the HV supply on.

CPU5V Common 5V supply for the CPU produced from

the VCC supply by CPU5V regulator IC3. The circuit outputs this voltage regardless of the transceiver on-off condition.

8V Common 8V supply produced from the HV

supply by 8V regulator IC2.

5V Common 5V supply produced from the HV

supply by 5V regulator Q12/Q13.

R8 Receive 8V supply produced by R8 regulator

Q10/Q11 using the “TXC” signal from I/O expander IC13.

T8 Transmit 8V supply controlled by T8 regulator

Q8/Q9 using the “TMUT” signal from I/O expander IC13.

5.7.4 UHF CPU IC1 PORT ALLOCATION

Pin No.

1 VIN Input port for overvoltage detection from

12 SCK Outputs clock signal to EEPROM IC3,

13 SI Input port for the data signal from

14 SO Outputs data signal to EEPROM IC3, PLL

16 CLIN Input port for cloning signal. 17 CLOUT Output port for cloning signal. 18 POSW Input for the POWER switch. Low =

19 NOIS NOIS signal input port from the FM IF

26 PTT Input port for the PTT switch. Low = PTT

32 RF ATT Outputs RF attenuator control signal to the

36 UNLK Input port for PLL unlock signal from the

37 PWON Outputs control signal for the power

38 DIM Outputs control signal for LCD backlight.

39 EXTPTT Input port for the PTT switch from exter-

40 DIM Input port for the LCD backlight control

41 PLST Outputs strobe signals fo r PLL IC10 (main

42 DAST Outputs strobe signals for level controller

43 EXST Outputs strobe signals for the I/O

45, 46KS1,

47-50KR3-

Port

Name

KS2

KR10

Description

the vehicle power source.

PLL IC10 (main unit) and expanders IC12, IC13 (main unit), etc.

EEPROM IC3, etc.

IC10 (mai n unit) and expanders IC12, IC13 (main unit).

POWER switch pushed.

IC1 (main unit) for noise squelch operation.

switch pushed.

attenuator switch (Q1 on main unit). Low = Attenuator function on.

PLL IC10 (main unit). High = unlock.

switching circuit (Q14/Q15 on main unit).

Low = LCD backlight on.

nal connector J5 (main unit). Low = External PTT s witch on.

signal from external connector J5 (main unit). Low = External dimmer switch on.

unit).

IC12 (main unit).

expander IC13 (main unit). Output ports for the key matri x.

Input ports for the key matrix

5B-11

November 1998

Part No. 001-7600-001

UHF (7640) CIRCUIT DESCRIPTION

Pin No.

51 BM Outpu ts control signal for beep mute cir-

52-54CTDA0-

55 HANG Input port for the microphone hanger

90 MTONE Output port for beep audio while receiving

91 TONED Outputs DTMF signa l s. 94-96OPV3-

97 CTCIN Input port for the CTCSS/DTCS IN

98 SD Input port for S-meter signal. 99 LVIN Input port for PLL lock voltage. 100 TEMP Input port for the transceiver’s internal

Port

Name

CTDA2

OPV1

Description

cuit Q10. High = Beep muted. Output port for CTCSS/DTCS signals.

detection signal. Low = Microphone on hook.

and 2/5 tone signals while transmitting.

Input port for option connector J4 state (main unit).

decode signals.

temperature.

5.7.5 UHF I/O EXPANDER IC12 (MAIN UNIT)

Pin No.

Port

Name

Description

5.7.6 UHF PORT EXPANDER IC13 (MAIN UNIT)

Pin No.

4 TXC Outputs control signal for R8 regulator

5 TMUT Outputs control signal for T8 regulator

6 RM Outputs AF mute switch IC11(main unit)

7 MM Outputs MIC mute control signal. High =

11 HORNO Outputs external device control signal.

12 AFON Outputs control signal for the AF amplifier

13 AFHPF Outputs AF filter control signal. High =

14 NWC Outputs receive/transmit passband width

Port

Name

Description

Q10/Q11 (main unit). High = Transmit mode.

Q8/Q9 (main unit). High = Transmitter off.

control signal for the receiver circuit. High = No receive audio is emitted.

DTMF signals are output, etc.

High = Matched 2/5-tone signals are received.

regulator circuit. High = Squelch is open, etc.

Filter out CTCSS or DTCS frequency.

control signal. High = Narrow bandwidth is selected.

2, 3, 10T1-T3 Output tunable bandpass filter control

signals.

11 T4 Output port for tunab le band pas s f ilter

control signal while receiving and power control signal while transmitting.

14 REF Output port for ref erence frequency

control voltage.

November 1998 Part No. 001-7600-001

5B-12

SECTION 6 ADJUSTMENT PROCEDURE

Progra mming Cable

Part No. 585-7500-031

ADJUSTMENT PROCEDURE

50 Ohm, 50W

Load

Wattmeter

Frequency

Monitor

13.6 Volt, 17A Power Supply

Test Cable (Fabricated)

Figure 6-1 Test Setup

6.1 GENERAL

6.1.1 SUGGESTED TEST EQUIPMENT

The equipment that should be used to adjust this

transceiver is listed in the following table.

Equipment Grade and Range

DC power supply Output voltage 13.6 VDC

Current capacity 15A

RF power meter Measuring range 1-50 W

Freq range 146-512 MHz Impedance 50 ohms SWR Less than 1.2:1

Frequency counter Freq range 0.1-500 MHz

Freq accuracy ±1 ppm or better Sensitivity 100 mV or better

4.0 Ohm Speaker Load

Equipment Grade and Range

FM deviation meter

Audio generator Freq range 67-3000 Hz

Attenuator Power atten. 50 or 60 dB

Standard Si gnal Generator (SSG)

DC voltmeter Input impedance 50kΩ/V DC or

Oscilloscope Freq range DC-20 MHz

AC millivoltmeter Measuring range 10 mV - 10V External Speaker Input Impedance 4

Freq range DC-520 MHz Measuring range 0 to ±10 kHz

Output level 1-500 mV

Capacity 50W Freq range 146-520 MHz

Output level 0.1 µV-32 mV

(–127 to –17 dBm)

better

Measuring range 0.01-20V

Ω

Power Capacity 5 watts min.

6-1

November 1998

Part No. 001-7600-001

ADJUSTMENT PROCEDURE

Supply Voltage

Internal Temp

PLL Lock Voltage

RSSI

DTCS Bal Level

Squelch Level

Selected Channel Info

RF Power Output

FM Deviation

DTCS Balance

Reference Frequency

Rx Bandpass Filter

IC5/IC12 D/A Outputs

Adjusts Current Vol Level

Squelch Level

NOTE: The above values for the various settings are examples only . Because of compo nent tolerances, the optimum setting for each transceiver will probably be different.

Figure 6-2 Screen Display Example

Programming Cable

To Computer

Pin 2 (Clone)

PTT Sw

Pin 5 (MICE “+”)

Pin 6 (MIC “–”)

Figure 6-3 Test Cable Schematic

6.1.2 TEST CHANNELS

NOTE: Before programming the test channels, download the current programming data in the transceiver and save it to a disk fil e so t hat i t can be reloaded after the adjustments are complete.

Test channels at the low, middle (VHF only), and high ends of the operating band, and High, Low1, and Low2 RF output power are required to perform the adjustments in this section. These test channels are listed in Tables 6-1 and 6-2, and they must be programmed as regular channels using the programming

Pin 4 (PTT)

Pin 8

Pin 1

To Transceiver

Mic In

Pin 7 (Ground)

software described in Sect ion 4. The re are no fixed t est channels or test modes selectable with this transceiver.

6.1.3 TEST CABLE

The test cable shown Figure 6-3 in must be fabricated to perform tr ansceiver alignment. This cable is used in place of the adapt er cabl e shown in Figure 4- 1. It is required because in addition to connecting the computer to the microphon e jack, a tr ansmit audio and keying (PTT) signal must be applied to that jack. If desired, Replication Cable, Part No. 597-2002-200, can be modified to provide the 8-pin modular-style connector required for this test cable.

November 1998 Part No. 001-7600-001

6-2

Table 6-1 VHF Test Frequenci es

ADJUSTMENT PROCEDURE

Test Channel

1 174.050 Low1 None Narrow or wide 2 146.050 Low1 None Narrow or wide 3 160.050 High None Narrow or wide 4 160.050 Low2 None Narrow or wide 5 160.050 Low1 None Narrow or wide 6 160.050 Low1 007N DTCS Narrow or wide 7 [1] 160.050 Low1 None Alternate 8 [1] 160.050 Low1 007 DTCS Alternate

[1] If the transceiver operates on only narrow or wide band channels, program only chan-

nels 1-6, and program them for th e typ e of chann els use d (narro w or wide ban d). If the transceiver operates on both wide and narrow band channels, program additional channels 7 and 8 for the other type of operation.

Tx/Rx Freq

(MHz)

Power

Call Guard

Squelch

Bandwidth [1]

Table 6-2 UHF Test Frequencies

Test Chan nel

1 400.050 450.050 470.050 490.050 Low1 None Narrow or wide 2 430.050 470.050 490.050 512.050 Low1 None Narrow or wide 3 400.050 450.050 470.050 490.050 High None Narrow or wide 4 400.050 450.050 470.050 490.050 Low2 None Narrow or wide 5 400.050 450.050 470.050 490.050 Low1 007N DTCS Narrow or wide 6 [1] 400.050 450.050 470.050 490.050 Low1 None Alternate 7 [1] 400.050 450.050 470.050 490.050 Low1 007N DTCS Alternate

[1] If the transceiver operates on only narrow or wide band channels, program only channels 1-5, and program them for

the type of channels used (narrow or wide band). If the transceiver operates on both wide and narrow band channels, program additional channels 6 and 7 for the other type of operation.

400-430 MHz 450-470 MHz 470-490 MHz 488-512 MHz

Model (see Section 1.4)

Power

Call Guard

Squelch

Bandwidth [1]

6.1.4 COMPUTER-AIDED TUNING

To make most adjustments described in the following information, the computer setup used for programming (see Section 4) and special Adjust software are required. The Adjust

software is included on the disk with the programming software in a separate subdirectory called ADJ. To set up the transceiver for use with this equipment, proceed as follows:

1. Copy the Adjust software to the hard disk or a pro-

gramming disk as described in Section 4.1.3

2. Turn transceiver power on

and connect the computer to the transceiver microphone jack using the programming cable and fabricated test cabl e described in the preceding section (see Figure 6-1).

3. Start the computer in the DOS mo de. Make the cur rent directory the ADJ subdirectory and start the program by typing the following:

ADJUST /X /Y

= A - VHF (normal crystal), B - UHF (TCXO)

= 1 - Serial port 1, 2 - Serial port 2

For example, if tuning a VHF transceiver and the programming cable is connected to serial port 2 of the computer, type ADJUST /A /2 (ENTER).

4. The tune data in the connected transceiver is then

downloaded and the adjustment screen shown in Figure 6-2 is displayed. The information displayed

November 1998

6-3

Part No. 001-7600-001

ADJUSTMENT PROCEDURE

VHF ADJUSTMENTS

in the upper part of the scr een is for the currently selected channel.

5. To move the cursor between the parameters on the

left side of the bar graph, press the ↑ ↓ arrow keys. T o change a parameter , press the ←

→

, PgUp/PgDn, backspace, or spacebar keys. Refer to the indivi dual adjustment desc riptions for more inform ation on the functions performed us ing this screen.

6.1.5 REPROGRAMMING IF EEPROM IS REPLACED OR ERROR OCCURS

When EEPROM IC3 is replaced or if the transceiver disp lays an error message and be eps, the following operation must be performed before making any adjustments.

1. Using the programming software, read (download)

the data programmed in an exact same version of the transceiver. Refer to Section 4.4. 4 for more information on reading data.

2. Select the MODEL menu and press the down arrow

( ↓ ) key. Type “RESERVE” and press (ENTER). The “Reserved” indicator should begin flashing in the upper ri ght corner of the screen.

3. Connect the computer t o the transceiver that had the EEPROM replaced or is displaying the error (see Figure 4-1). Write the current data to that transceiver .

6.2 PRELIMINAR Y SETUP

1. Preprogram the transceiver with test channels as described in Section 6.1.2.

2. Connect the computer test set up using the test cable described in Sections 6.1.3 and 6.1.4. Start the program as described.

3. Connect a DC power supply and a 50-ohm, 50-wat t antenna load to the transceiver (see Section 6.1.1).

VHF ADJUSTMENTS

6.3 PLL ADJUSTMENT (VHF MODELS)

1. Remove the bottom cover by removing four scr ews. Connect a DC voltmete r to c heck po int CP1 sho wn in Figure 6-4.

2. Select the channel on the high end of the band (Test Ch. 1 - 174.050 MHz). This is done by pressing the ↑ ↓ arrow keys to highlight “Memory CH” and then pressing the adjust keys (←/ PgDn, or spacebar/back space) to s elect the channel.

3. Key the transmitter using the switch on the test cable and the meter reading should be 4.3 volts. If this voltage is significantly different, adjust L14 (it may be necessary to remove the VCO shield).

4. Unkey the transmitter and the mete r reading in the receive mode should be 3.3 – 4.3 volts.

→,

PgUp/

5. Select the channel on the low end of the band (Test Ch. 2 - 146.050 MHz). The meter reading should b e

0.9 – 1.9 volt in both the transmit and receive modes. Replace the bottom cover.

6.4 TRANSMITTER ADJUSTMENTS (VHF

MODELS)

6.4.1 REFERENCE FREQUENCY

1. Select the channel on the high end of the band (Test Ch. 1 - 174.050 MHz).

2. Scroll down to “TXF SET” on the scree n and pre ss (Enter). Mon itor the transmit signal with a frequency counter and key the transmitter using the test cable switch.

3. Adjust for the displayed frequency by pressing the computer adjust keys. Unkey the transmitter.

November 1998 Part No. 001-7600-001

6-4

VHF ADJUSTMENTS (CONT’D)

ADJUSTMENT PROCEDURE

Figure 6-4 VHF Adjustment Points

4. Press (Enter) again to select th e second adju st chan nel. Key the transmitter and adjust for the di splayed frequency. Unkey the t ransmitter and press (Ent er) again to exit this function.

6.4.2 OUTPUT PO WER ADJUST

L14

PLL lock voltage adjustment

CP1

PLL lock voltage

check point

puter adjust keys to se t the followin g power . Unkey the transmitter. Repeat for the Low2 (Test Ch. 4) and Low1 (Test Ch. 5) power levels.

High Power = 45 watts (Test Ch. 3) Low2 Power = 25 watts (Test Ch. 4) Low1 Power = 4.5 watts (Test Ch. 5)

1. Select the high power channel in the middle of the band (T e st Ch. 3 - 160.050 MHz). Connect a power meter to the antenna jack.

2. Scroll to “Power (Hi)” on the screen and key the transmitter using the test cable switch. Use the com-

6.4.3 FM DEVIATION ADJUST

1. Connect an audio generator to the microphone audio input of the test cable (pin 5 shown in Figure 6-3). Set the generator output for 1 kHz at 40 mV rms.

November 1998

6-5

Part No. 001-7600-001

ADJUSTMENT PROCEDURE

VHF ADJUSTMENTS (CONT’D)

2. Select the low power channel in the middle of the band (Test Ch. 5 - 160.050 MHz). On the c omputer screen, scroll to “MOD N” if setting narrow band deviation or “MOD W” if setting wideband deviation.

3. Monitor the transmit deviation with a communications monitor set as foll ows: HPF = Off, LPF = 20 kHz, De-Emphasis = Off, Detector = (P–P)/2.

4. Key the transmitter using the test cable switch and set the following maximum deviation by pressing the adjust keys (←/

→,

PgUp/PgDn, or spacebar/

backspace). Unkey the transmitter.

Wideband (30 kHz) Models - 4.2 kHz Narrow Band (12.5 kHz) Models - 2.1 kHz

5. If the transceiver operates on both narrow and wide band channels, select Test Ch. 7 and also adjust the deviation on that channel (see note in Table 6-1).

6.4.4 DTCS WA VEFORM ADJUST

1. Select a channel in the middle of the band programmed for DTCS (T est Ch. 8 - 160.050 MHz). On the computer screen, scroll to “DTCS N” if setting a narrow band channel or “DTCS W” if setting a wideband channel.

2. Connect an RF signal generator to the antenna jack. Set the output for the channel frequenc y at a level of

3.2 µ V (–97 dBm), modulated with 1 kHz at the following deviation:

Wideband (30 kHz) Models - 3.5 kHz Narrowband (12.5 kHz) Models - 1.75 kHz

3. Adjust the filters au tomatically or manually as follows:

Automatic Adjustment Method 1

(Adjusts all filters)

a. Select “BPF T1” on th e screen and adjust for “0”.

Repeat for T2 – T4. Reselect “BPF T1”.

b. Press the F9 key and all filters are automaticall y

adjusted for peak levels.

Automatic Adjustment Method 2 (Adjusts only one filter at a time)

a. Select “BPF T1” and press F8 to automatically

adjust it for a peak level.

b. Repeat for the other three filters.

Manual Adjustment

2. Key the transmitter and view the demodulated signal on the CRT of a communications monitor.

3. Press the adjust keys on the computer so that the waveform appears as follows:

Set For

Flat

Waveform

4. If the transceiver operates on both narrow and wide band channels, select Test Ch. 8 and also set the waveform on that channel (see note in Table 6-1).

6.5 RECEIVER ADJUSTMENTS (VHF MODELS)

6.5.1 BANDPASS FILTER ADJUST

1. Select the channel on the low end of the band (Test Ch. 2 - 146.050 MHz).

November 1998 Part No. 001-7600-001

a. Connect a SINAD met er with a 4-ohm load to the

external speaker jack (see Figure 6-4).

b. Select “BPF T1” and press the adj ust keys (←/

PgUp/PgDn, or spacebar/backspace) to obtain minimum distortion.

c. Repeat for the other three filters.

6.5.2 SQUELCH ADJUST

NOTE: The squelch level can also be set from the front panel as described in Section 3.3.6.

1. Select the channel on the low end of the operating band (Test Ch. 2 - 146.050 MHz).

2. Connect a SINAD meter with a 4-ohm load to the external speaker jack.

6-6

→,

VHF ADJUSTMENTS (CONT’D)

ADJUSTMENT PROCEDURE

3. Connect an RF signal generator to the antenna jack. Set it to the channel frequen cy wit h an out put mod ulated with 1 kHz at the following deviation:

Wideband (30 kHz) Models - 3.5 kHz Narrowband (12.5 kHz) Models - 1.75 kHz

4. Scroll to “SQL” on the computer screen and press the adjust keys to lower the displayed number so that the receiver unsquelches (the 1 kHz tone is heard). Also adjust the volume if necessary.

5. Adjust the signal generator output to obtain 8 dB SINAD.

6. Press the computer adjust keys to increase the displayed number to the point where the receiver squelches. Then slowly adjust the number downward again until the receiver just unsquelches.

6.5.3 BEEP TONE LEVEL

This adjustment sets the volume of the beep tone that is heard when keys are pressed and at other times (if it is enabled). The computer setup used in the preceding steps is not required for this adjustment. Proceed as follows:

1. Unplug any cable that may be plugged into the

microphone jack and locate R60 inside this jack. (see Figure 6-5).

2. Repeatedly press a front panel swi tc h to ena ble the

beep tone and adjust R60 for the desired level.

R60

Beep Tone Level Adj

Figure 6-5 Beep Tone Level Adjustment

6-7

November 1998

Part No. 001-7600-001

ADJUSTMENT PROCEDURE

UHF ADJUSTMENTS

NOTE: Perform the preliminary setup described in Section 6.2 before proceeding with these adjustments.

6.6 PLL ADJUSTMENT (UHF MODELS)

1. Remove the bottom cover by removing four scr ews. Connect a DC voltmete r to c heck po int CP1 sho wn in Figure 6-6.

2. Select the channel at the low end of the band (T est Ch. 1). This is done by press ing the ↑ ↓ arrow keys to highlight “Memory CH” and then pressing the adjust keys (←/

→,

PgUp/PgDn, or spacebar/

backspace) to select the channel.

3. In the receive mode, the met er reading should be 1.5 volts. If this vol tage is signif icantly dif ferent, adj ust L23 (it may be necessary to remove the shield).

4. Key the transmitter using the switch on the test cable and the meter reading also shou ld be 1.5 volts. If this volta ge is signific antly different, adjust L26.

5. Unkey the transmitte r and s el ect t he chan nel on the high end of the band (T est Ch. 2). Th e meter reading in the receive and tr ansmit modes should be 3.5 –

5.5 volts. Replace the bottom cover.

6.7 TRANSMITTER ADJUSTMENTS (UHF

MODELS)

6.7.1 REFERENCE FREQUENCY

1. Select the low power c hannel on the high end of th e band (Test Ch. 2).

2. Scroll down to “TXF SET” on the scree n and pres s (Enter). Mon itor the transm it signal with a frequency counter and key the transmitter using the test cable switch.

3. Adjust for the displayed frequency by pressing the computer adjust keys. Unkey the transmitter.

4. Press (Enter) again to select th e second adju st chan nel. Key the transmitter and adjust for the di splayed

frequency. Unkey the transmitter and press (Enter) again to exit this function.

6.7.2 OUTPUT PO WER ADJUST

1. Select the high power channel at the low end of the band (Test Ch. 3). Connect a power meter to the antenna jack.

2. Scroll to “Power (Hi)” on the screen and key the transmitter using the test cable switch. Use the computer adjust keys to se t the followin g power . Unkey the transmitter. Repeat for the Low2 (Test Ch. 4) and Low1 (Test Ch. 5) power levels.

High Power = 35 watts Low2 Power = 20 watts Low1 Power = 3.5 watts

6.7.3 FM DEVIATION ADJUST

1. Connect an audio generator to the microphone audio input of the test cable (pin 5 shown in Figure 6-3). Set the generator output for 1 kHz at 40 mV rms.

2. Select the low power channel at the low end of the band (T est Ch . 1). On the computer scr een, scroll to “MOD N” if setting narrow band deviation or “MOD W” if setting wideband deviation.

3. Monitor the transmit deviation with a communications monitor set as foll ows: HPF = Off, LPF = 20 kHz, De-Emphasis = Off, Detector = (P–P)/2.

4. Key the transmitter using the test cable switch and set the following maximum deviation by pressing the adjust keys (←/

→,

PgUp/PgDn, or spacebar/

backspace). Unkey the transmitter.

Wideband (30 kHz) Models - 4.2 kHz Narrow Band (12.5 kHz) Models - 2.1 kHz

5. If the transceiver operates on both narrow and wide band channels, select Test Ch. 6 and also adjust the deviation on that channel (see note in Table 6-2).

November 1998 Part No. 001-7600-001

6-8

Set For

Flat

Waveform

UHF ADJUSTMENTS (CONT’D)

ADJUSTMENT PROCEDURE

CP1

PLL lock voltage check point

Figure 6-6 UHF Adjustment Points

6.7.4 DTCS WA VEFORM ADJUST

1. Select the channel on the low end of the programmed for DTCS code 007N (Test Ch. 5).

L23

PLL lock voltage adjustment

L26

PLL lock voltage adjustment

4. Press the adjust keys on the computer so that the waveform appears as follows:

2. On the computer screen, scroll to “DTCS N” if setting a narrow band channel or “DTCS W” if settin g a wideband channel.

3. Key the transmitter and view the demodulated signal on the CRT of a communications monitor.

5. If the transceiver operates on both narrow and wide band channels, select Test Ch. 7 and also set the waveform on that channel (see note in Table 6-2).

November 1998

6-9

Part No. 001-7600-001

ADJUSTMENT PROCEDURE

UHF ADJUSTMENTS (CONT’D)

6.8 RECEIVER ADJUSTMENTS (UHF MODELS)

6.8.1 BANDPASS FILTER ADJUST

1. Select the channel on the low end of the band (Test Ch. 1).

2. Connect an RF signal gen erator to t he antenna j ack. Set the output for the channel frequenc y at a level of

3.2 µ V (–97 dBm), modulated with 1 kHz at the following deviation:

Wideband (25 kHz) Models - 3.5 kHz Narrowband (12.5 kHz) Models - 1.75 kHz

3. Adjust the filters au tomatically or manually as follows:

Automatic Adjustment Method 1

(Adjusts all filters)

a. Select “BPF T1” on th e screen and adjust for “0”.

Repeat for T2 – T4. Reselect “BPF T1”.

b. Press the F9 key and all filters are automaticall y

adjusted for peak levels.

Automatic Adjustment Method 2 (Adjusts only one filter at a time)

6.8.2 SQUELCH ADJUST

NOTE: The squelch level can also be set from the front panel as described in Section 3.3.6.

1. Select the channel on the low end of the operating band (Test Ch. 2). channel with LB models and th e

150.050 MHz channel with HB models.

2. Connect a SINAD meter with a 4-ohm load to the external speaker jack.

3. Connect an RF signal generator to the antenna jack. Set it to the channel freque ncy wit h an out put mod ulated with 1 kHz at the following deviation:

Wideband (30 kHz) Models - 3.5 kHz Narrowband (12.5 kHz) Models - 1.75 kHz

4. Scroll to “SQL” on the computer screen and press the adjust keys to lower the displayed n umber so that the receiver unsquelches (the 1 kHz tone is heard). Also adjust the volume if necessary.

5. Adjust the signal generator output to obtain 8 dB SINAD.

6. Press the computer adjust keys to increase the displayed number to the point where the receiver squelches. Then slowly adjust the number downward again until the receiver just unsquelches.

a. Select “BPF T1” and press F8 to automatically

adjust it for a peak level.

b. Repeat for the other three filters.

Manual Adjustment

a. Connect a SINAD met er with a 4-ohm load to the

external speaker jack (see Figure 6-6).

b. Select “BPF T1” and press the adj ust keys (←/

PgUp/PgDn, or spacebar/backspace) to obtain minimum distortion.

c. Repeat for the other three filters.

November 1998 Part No. 001-7600-001

→,

6.8.3 BEEP TONE LEVEL

1. Unplug any cable that may be plugged into the

microphone jack and locate R60 inside this jack. (see Figure 6-5).

2. Repeatedly press a front panel switch to enable the

beep tone and adjust R60 for the desired level.

6-10

SECTION 7 PARTS LIST

7610 (VHF) Main Unit

PARTS LIST

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&íåæ &HUDPэ*50йлрзэ&+эмен-эинн37 нллркднзрждд

&íåå &HUDPэ*50йлрзэ&+эллн-эинн37 нллркднзреме

&íåä &HUDPLFэ&мзнеэ&+эм+энжн'р7р$ нллркднзридз

&íäí &HUDPLFэ&мзнеэ&+эм+энйн%р7р$ нллркднзрзнд

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7-1

November 1998

Part No. 001-7600-001

PARTS LIST

7510 (VHF) Main Unit7610 (VHF) Main Unit

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

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November 1998 Part No. 001-7600-001

7-2

7610 (VHF) Main Unit

PARTS LIST

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

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7-3

November 1998

Part No. 001-7600-001

PARTS LIST

7610 (VHF) Main Unit

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

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November 1998 Part No. 001-7600-001

7-4

7610 (VHF) Main Unit

PARTS LIST

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

/ëæ &RLOý0/)ìçíå$ýì5í.ð7 нллркднзрзиз

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7-5

November 1998

Part No. 001-7600-001

PARTS LIST

7610 (VHF) Main Unit

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

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5íåê 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5íåé 5HVэ(5-к*(<-эмнмэ9эхмннэRKPф нллркднзрмйк

5íåç 5HVэ(5-к*(<-эллмэ9эхллнэRKPф нллркднзрлее

5íåæ 5HVэ(5-к*(<-эелмэ9эхелнэRKPф нллркднзрмик

5íåä 5HVэ(5-к*(<-эизмэ9эхизнэRKPф нллркднзрмим

5íäí 5HVэ(5-к*(<-эмилэ9эхмпиэNэRKPф нллркднзрмии

5íäì 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5íäë 5HVэ(5-к*(<-эйжмэ9эхйжнэRKPф нллркднзрмин

5íäê 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5íäè 5HVэ(5-к*(<-эмилэ9эхмпиэNэRKPф нллркднзрмии

5íäç 5HVэ(5-к*(<-эмелэ9эхмпеэNэRKPф нллркднзрмиз

5íäæ 5HVэ(5-к*(<-эйжмэ9эхйжнэRKPф нллркднзрмин

5íäå 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5íää 5HVэ(5-к*(<-экклэ9эхкпкэNэRKPфэ нллркднзрмид

5ìíí 5HVэ(5-к*(<-эккйэ9эхккнэNэRKPф нллркднзрмен

5ìíì 5HVэ(5-к*(<-экдмэ9эхкднэRKPф нллркднзрмйд

5ìíë 5HVэ(5-к*(<-эмилэ9эхмпиэNэRKPф нллркднзрмии

5ìíé 5HVэ(5-к*(<-эмннэ9эхмнэRKPф нллркднзрмке

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

5ìíè 5HVэ(5-к*(<-эмикэ9эхмиэNэRKPф нллркднзрмзи

5ìíç 5HVэ(5-к*(<-эмикэ9эхмиэNэRKPф нллркднзрмзи

5ìíæ 5HVэ(5-к*(<-эллкэ9эхллэNэRKPф нллркднзрмзж

5ìíå 5HVэ(5-к*(<-эллкэ9эхллэNэRKPф нллркднзрмзж

5ìíä 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ììí 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ììì 5HVэ(5-к*(<-эмнмэ9эхмннэRKPф нллркднзрмйк

5ììë 5HVэ(5-к*(<-эмнмэ9эхмннэRKPф нллркднзрмйк

5ììê 5HVэ(5-к*(<-экдлэ9эхкпдэNэRKPф нллркднзркдм

5ììé 5HVэ0&5ин-=+-эзенэRKPэхземф нллркднзрези

5ììè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ììç 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ììæ 5HVэ(5-к*(<-эмийэ9эхминэNэRKPф нллркднзркдл

5ììå 5HVэ(5-к*(<-эмикэ9эхмиэNэRKPф нллркднзрмзи

5ììä 5HVэ55немз5рмнйр'эхмннэNэRKPф нллркднзркди

5ìëí 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллр

5ìëì 5HVэ55немз5ркнйр'эхкннэNэRKPф нллркднзрезз

5ìëë 5HVэ55немз5ржикр'эхжиэNэRKPф нллркднзрезж

5ìëê 5HVэ(5-к*(<-эзелэ9эхзпеэNэRKPф нллркднзрмзл

5ìëé 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìëè 5HVэ(5-к*(<-эмннэ9эхмнэRKPф нллркднзрмке

5ìëç 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìëæ 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìëå 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìëä 5HVэ(5-к*(<-эизмэ9эхизнэRKPф нллркднзрмим

5ìêí 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìêì 5HVэ(5-к*(<-эзекэ9эхзеэNэRKPф нллркднзрмжк

5ìêê 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ìêé 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ìêè 5HVэ(5-к*(<-элжкэ9эхлжэNэRKPф нллркднзрмзе

5ìêç 5HVэ(5-к*(<-эзекэ9эхзеэNэRKPф нллркднзрмжк

5ìêæ 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ìêä 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ìéí 5HVэ(5-к*(<-эмнмэ9эхмннэRKPф нллркднзрмйк

5ìéì 5HVэ55немз5рмнйр'эхмннэNэRKPф нллркднзркди

5ìéë 5HVэ55немз5рмнйр'эхмннэNэRKPф нллркднзркди

5ìéê 5HVэ55немз5рмнйр'эхмннэNэRKPф нллркднзркди

5ìéè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìéç 5HVэ(5-к*(<-эзекэ9эхзеэNэRKPф нллркднзрмжк

5ìéæ 5HVэ(5-к*(<-эмейэ9эхменэNэRKPф нллркднзрмжж

5ìéå 5HVэ(5-к*(<-эизкэ9эхизэNэRKPф нллркднзрмжл

5ìéä 5HVэ(5-к*(<-эмейэ9эхменэNэRKPф нллркднзрмжж

5ìèí 5HVэ(5-к*(<-эллйэ9эхллнэNэRKPф нллркднзрмже

5ìèì 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìèë 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìèê 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

November 1998 Part No. 001-7600-001

7-6

7610 (VHF) Main Unit

PARTS LIST

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

5ìèé 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìèè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìèç 5HVэ(5-к*(<-эзейэ9эхзенэNэRKPф нллркднзрмек

5ìèæ 5HVэ(5-к*(<-эмлкэ9эхмлэNэRKPф нллркднзрмзй

5ìèå 5HVэ(5-к*(<-эзейэ9эхзенэNэRKPф нллркднзрмек

5ìèä 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìçí 5HVэ(5-к*(<-эмикэ9эхмиэNэRKPф нллркднзрмзи

5ìçì 5HVэ(5-к*(<-эйжйэ9эхйжнэNэRKPф нллркднзрмем

5ìçë 5HVэ(5-к*(<-эзекэ9эхзеэNэRKPф нллркднзрмжк

5ìçê 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ìçé 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ìçè 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ìçç 5HVэ(5-к*(<-эмлйэ9эхмлнэNэRKPф нллркднзрмжз

5ìçæ 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ìçå 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ìçä 5HVэ(5-к*(<-элллэ9эхлплэNэRKPф нллркднзрмиж

5ìæí 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ìæì 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ìæë 5HVэ(5-к*(<-эмикэ9эхмиэNэRKPф нллркднзрмзи

5ìæé 5HVэ(5-к*(<-эзейэ9эхзенэNэRKPф нллркднзрмек

5ìæè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìæç 5HVэ(5-к*(<-эзейэ9эхзенэNэRKPф нллркднзрмек

5ìææ 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ìæå 5HVэ(5-к*(<-экккэ9эхккэNэRKPф нллркднзрмзд

5ìæä 5HVэ(5-к*(<-эмийэ9эхминэNэRKPф нллркднзркдл

5ìåí 5HVэ(5-к*(<-экдкэ9эхкдэNэRKPф нллркднзрмжн

5ìåì 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ìåë 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ìåê 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìåé 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìåè 7KHUPLVWRUэ17&&)лнмлэй$+э

éæê.&ð7

5ìåç 5HVэ55немз5рмнйр'эхмннэNэRKPф нллркднзркди

5ìåæ 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ìåå 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ìåä 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ìäí 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìäì 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìäë 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìäê 5HVэ(5-к*(<-элллэ9эхлплэNэRKPф нллркднзрмиж

5ìäé 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìäè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìäç 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ìäæ 5HVэ0&5ин-=+-эмэNэRKPэхмнлф нллркднзрезе

5ìäå 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ìää 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

нллркднзрйнк

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

5ëíí 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ëíì 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëíë 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ëíê 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ëíé 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëíè 5HVэ55немз5ркнйр'эхкннэNэRKPф нллркднзрезз

5ëíç 5HVэ55немз5рмнйр'эхмннэNэRKPф нллркднзркди

5ëíæ 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ëíå 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ëíä 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ëìí 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ëìì 5HVэ(5-к*(<-элллэ9эхлплэNэRKPф нллркднзрмиж

5ëìë $UUD\ý(;%ð9å9ýìíë-9 нллркднзржнн

5ëìê $UUD\ý(;%ð9å9ýìíë-9 нллркднзржнн

5ëìé $UUD\ý(;%ð9å9ýìíë-9 нллркднзржнн

5ëìè $UUD\ý(;%ð9å9ýìíë-9 нллркднзржнн

5ëìç $UUD\ý(;%ð9å9ýìíë-9 нллркднзржнн

5ëìæ $UUD\ý(;%ð9å9ýìíë-9 нллркднзржнн

5ëìå $UUD\ý(;%ð9å9ýìíë-9 нллркднзржнн

5ëìä $UUD\ý(;%ð9å9ýìíë-9 нллркднзржнн

5ëëí 5HVэ(5-к*(<-эмнмэ9эхмннэRKPф нллркднзрмйк

5ëëì 5HVэ0&5ме(=+-эллэRKPэхллнф нллркднзрежн

5ëëë 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ëëê 5HVэ(5-к*(<-экккэ9эхккэNэRKPф нллркднзрмзд

5ëëç 5HVэ(5-к*(<-эмейэ9эхменэNэRKPф нллркднзрмжж

5ëëæ 5HVэ(5-к*(<-эзейэ9эхзенэNэRKPф нллркднзрмек

5ëëå 5HVэ(5-к*(<-эмекэ9эхмеэNэRKPф нллркднзрмзз

5ëëä 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ëêí 5HVэ(5-к*(<-элллэ9эхлплэNэRKPф нллркднзрмиж

5ëêë 5HVэ(5-к*(<-эйжйэ9эхйжнэNэRKPф нллркднзрмем

5ëêê 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêé 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ëêè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ëêç 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ëêæ 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêå 5HVэ(5-к*(<-эмекэ9эхмеэNэRKPф нллркднзрмзз

5ëéí 5HVэ(5-к*(<-эзелэ9эхзпеэNэRKPф нллркднзрмзл

5ëéì 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ëéë 5HVэ(5-к*(<-эйжмэ9эхйжнэRKPф нллркднзрмин

5ëéê 5HVэ0&5ме(=+-эзеэRKPэхзенф нллркднзрежм

5ëéè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ëéç 5HVэ(5-к*(<-эизмэ9эхизнэRKPф нллркднзрмим

5ëéæ 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ëéå 5HVэ55немз5рккйр'эхккнэNэRKPф нллркднзрздм

5ëéä 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ëèì 6ý3RVLVWRUý37+ä&êë%%éæì4ð7ý нллркднзрежл

7-7

November 1998

Part No. 001-7600-001

PARTS LIST

7610 (VHF) Main Unit 7640 (UHF) Main Unit

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

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7-8

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PARTS LIST

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7-9

November 1998

Part No. 001-7600-001

PARTS LIST

7640 (UHF) Main Unit

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7-10

7640 (UHF) Main Unit

PARTS LIST

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7-11

November 1998

Part No. 001-7600-001

PARTS LIST

7640 (UHF) Main Unit

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November 1998 Part No. 001-7600-001

7-12

7640 (UHF) Main Unit

PARTS LIST

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

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7-13

November 1998

Part No. 001-7600-001

PARTS LIST

7640 (UHF) Main Unit

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

/íë &RLOэ/$ркелэхйднримлэ0+]эRQO\ф нллркднзрдил

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November 1998 Part No. 001-7600-001

7-14

7640 (UHF) Main Unit

PARTS LIST

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

4êæ 7UDQVLVWRUý'7&ìéé(8ý7ìíæ нллркднзрнке

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5íçè 5HVэ(5-к*(<-эзекэ9эхзеэNэRKPф нллркднзрмжк

5íçç 5HVэ(5-к*(<-эзекэ9эхзеэNэRKPф нллркднзрмжк

5íçæ 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5íçå 5HVэ(5-к*(<-эмллэ9эхмплэNэRKPф нллркднзркдн

5íçä 5HVэ(5-к*(<-эмимэ9эхминээRKPф нллркднзрмйи

5íæí 5HVэ0&5мн(=+-элплээRKPэхл5лф нллркднзрейж

5íæì 5HVэ0&5мн(=+-эллээRKPэхллнфэ

хйднримлэ0+]эRQO\ф

5HVэ0&5мн(=+-эккээRKPэхккнфэ хRWKHUэEDQGVф

5íæë 5HVэ0&5мн(=+-элжээRKPэхлжнфэ

хйднримлэ0+]эRQO\ф

5HVэ0&5мн(=+-эккээRKPэхккнфэ хRWKHUэEDQGVф

5íæê 5HVэ(5-к*(<-элллэ9эхлплэNэRKPф нллркднзрмиж

нллркднзрмзж

нллркднзрмзз

нллркднзрейе

нллркднзрддл

нллркднзрддк

нллркднзрддл

7-15

November 1998

Part No. 001-7600-001

PARTS LIST

7640 (UHF) Main Unit

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

5íæé 5HVэ(5-к*(<-эллмэ9эхллнээRKPф нллркднзрлее

5íæè 5HVэ(5-к*(<-эмнмэ9эхмннээRKPф нллркднзрмйк

5íæç 5HVэ(5-к*(<-эллнэ9эхллээRKPф нллркднзрзеи

5íææ 5HVэ(5-к*(<-экклэ9эхкпкэNэRKPф нллркднзрмид

5íæå 5HVэ(5-к*(<-эмилэ9эхмпиэNэRKPф нллркднзрмии

5íæä 5HVэ(5-к*(<-эллнэ9эхллээRKPф нллркднзрзеи

5íåí 5HVэ(5-к*(<-эллмэ9эхллнээRKPф нллркднзрлее

5íåì 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5íåë 5HVэ(5-к*(<-элжлэ9эхлпжэNэRKPф нллркднзрмие

5íåê 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5íåé 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5íåè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5íåç 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5íåæ 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5íäé 5HVэ(5-к*(<-эмилэ9эхмпиэNэRKPф нллркднзрмии

5íäè 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5íäç 5HVэ(5-к*(<)эдмкэ9эхдмэNэRKPф нллркднзрддж

5íäæ 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5íäå 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5íää 5HVэ(5-к*(<-элллэ9эхлплэNэRKPф нллркднзрмиж

5ìíí 5HVэ55немз5ркзкр'эхкзэNэRKPф нллркднзрдей

5ìíì 5HVэ(5-к(.)эймлм9эхйпмлэNэRKPф нллркднзреиж

5ìíë 5HVэ(5-к*(<-эм5нэ9эхмээRKPф нллркднзрзее

5ìíê 5HVэ(5-к*(<-эллйэ9эхллнэNэRKPф нллркднзрмже

5ìíé 5HVэ(5-к*(<-эллкэ9эхллэNэRKPф нллркднзрмзж

5ìíè 5HVэ(5-к*(<-эллкэ9эхллэNэRKPф нллркднзрмзж

5ìíç 5HVэ(5-к*(<-элжйэ9эхлжнэNэRKPф нллркднзрмжд

5ìíæ 5HVэ(5-к*(<-эмнмэ9эхмннээRKPф нллркднзрмйк

5ìíå 5HVэ(5-к*(<-эмлкэ9эхмлэNэRKPф нллркднзрмзй

5ìíä 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ììí 7KHUPLVWRUэ17&&)лнмлэй$+э

éæê.&ð7

5ììì 5HVэ55немз5рмнйр'эхмннэNэRKPф нллркднзркди

5ììë 5HVэ55немз5ркнйр'эхкннэNэRKPф нллркднзрезм

5ììê 5HVэ55немз5рмнйр'эхмннэNэRKPф нллркднзркди

5ììé 5HVэ(5-к*(<-эмннэ9эхмнээRKPф нллркднзрмке

5ììè 5HVэ(5-к*(<-эзелэ9эхзпеэNэRKPф нллркднзрмзл

5ììç 5HVэ(5-к*(<-эзелэ9эхзпеэNэRKPф нллркднзрмзл

5ììæ 5HVэ(5-к*(<-эм5нэ9эхмээRKPф нллркднзрзее

5ììå 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ììä 5HVэ(5-к*(<-элжлэ9эхлпжэNэRKPфэ

хйинрйжнэ0+]ф

5HVэ(5-к*(<-экклэ9эхкпкэNэRKPфэ хRWKHUэEDQGVф

5ìëí 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìëì 5HVэ(5-к*(<-эйжнэ9эхйжээRKPф нллркднзрмйм

нллркднзрйнк

нллркднзрмие

нллркднзрмид

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

5ìëë 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìëê 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ìëé 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ìëè 5HVэ(5-к*(<-эмннэ9эхмнээRKPф нллркднзрмке

5ìëç 5HVэ(5-к*(<-эизмэ9эхизнээRKPф нллркднзрмим

5ìëæ 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ìëå 5HVэ(5-к*(<-эмннэ9эхмнээRKPф нллркднзрмке

5ìëä 5HVэ(5-к*(<-эмннэ9эхмнээRKPф нллркднзрмке

5ìêí 5HVэ(5-к*(<-эмийэ9эхминэNэRKPф нллркднзркдл

5ìêì 5HVэ(5-к*(<-эллмэ9эхллнээRKPф нллркднзрлее

5ìêë 5HVэ(5-к*(<-эмейэ9эхменэNэRKPф нллркднзрмжж

5ìêê 5HVэ(5-к*(<-эмннэ9эхмнээRKPф нллркднзрмке

5ìêé 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ìêè 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ìêç 5HVэ(5-к*(<-эллмэ9эхллнээRKPф нллркднзрлее

5ìêæ 5HVэ(5-к*(<-эйжлэ9эхйпжэNэRKPф нллркднзрмзн

5ìêå 5HVэ(5-к*(<-элжмэ9эхлжнээRKPф нллркднзрмйж

5ìêä 5HVэ(5-к*(<-эменэ9эхмеээRKPф нллркднзрмйн

5ìéí 5HVэ(5-к*(<-элжмэ9эхлжнээRKPф нллркднзрмйж

5ìéì 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìéë 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìéê 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ìéé 5HVэ(5-к*(<-эллкэ9эхллэNэRKPф нллркднзрмзж

5ìéè 5HVэ55немз5ржикр'эхжиэNэRKPф нллркднзрезж

5ìéç 5HVэ(5-к*(<-эелкэ9эхелэNэRKPф нллркднзрмжй

5ìéæ 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìéå 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìèí 5HVэ(5-к*(<-эмнмэ9эхмннээRKPф нллркднзрмйк

5ìèì 5HVэ(5-к*(<-эллйэ9эхллнэNэRKPф нллркднзрмже

5ìèë 5HVэ(5-к*(<-эизлэ9эхипзэNэRKPф нллркднзрмзм

5ìèê 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìèé 5HVэ(5-к*(<-эмнмэ9эхмннээRKPф нллркднзрмйк

5ìèè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìèç 5HVэ(5-к*(<-эизкэ9эхизэNэRKPф нллркднзрмжл

5ìèæ 5HVэ(5-к*(<-эмлиэ9эхмплэ0э

RKPô

5ìèå 5HVэ(5-к*(<-эмикэ9эхмиэNэRKPф нллркднзрмзи

5ìèä 5HVэ(5-к*(<-экккэ9эхккэNэRKPф нллркднзрмзд

5ìçí 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ìçì 5HVэ(5-к*(<-эйжйэ9эхйжнэNэRKPф нллркднзрмем

5ìçë 5HVэ(5-к*(<-эйжйэ9эхйжнэNэRKPф нллркднзрмем

5ìçê 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìçé 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ìçè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìçç 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìçæ 5HVэ(5-к*(<-эмнмэ9эхмннээRKPф нллркднзрмйк

нллркднзреиз

November 1998 Part No. 001-7600-001

7-16

7640 (UHF) Main Unit

PARTS LIST

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

5ìçå 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìçä 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ìæí 5HVэ(5-к*(<-эзелэ9эхзпеэNэRKPф нллркднзрмзл

5ìæë 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìæê 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìæé 5HVэ(5-к*(<-эйжмэ9эхйжнээRKPф нллркднзрмин

5ìæè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìæç 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ìææ 5HVэ(5-к*(<-эзекэ9эхзеэNэRKPф нллркднзрмжк

5ìæå 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìæä 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ìåí 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìåì 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ìåë 5HVэ(5-к*(<-эмннэ9эхмнээRKPф нллркднзрмке

5ìåé 5HVэ(5-к*(<-элжлэ9эхлпжэNэRKPф нллркднзрмие

5ìåè 5HVэ(5-к*(<-эмнмэ9эхмннээRKPф нллркднзрмйк

5ìåç 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ìåæ 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ìåå 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ìåä 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ìäí 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ìäì 5HVэ(5-к*(<-эизнэ9эхизээRKPф нллркднзрмйл

5ìäê 5HVэ(5-к*(<-эйжйэ9эхйжнэNэRKPф нллркднзрмем

5ìäé 5HVэ(5-к*(<-эмейэ9эхменэNэRKPф нллркднзрмжж

5ìäè 5HVэ(5-к*(<-эллйэ9эхллнэNэRKPф нллркднзрмже

5ìäå 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ìää 5HVэ(5-к*(<-эйжмэ9эхйжнээRKPф нллркднзрмин

5ëíé 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ëíè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ëíç 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ëíæ 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëíå 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ëíä 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ëìí 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ëìì 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ëìë 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ëìê 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ëìé 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ëìè 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ëìç 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ëìæ 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ëìå 5HVэ(5-к*(<-эмниэ9эхмэ0эRKPф нллркднзрмей

5ëìä 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëëí 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëëì 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëëë 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

5ëëê 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëëé 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëëè 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëëç 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëëæ 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëëå 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëëä 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêí 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêì 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêë 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêê 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêé 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêè 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêç 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêæ 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêå 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëêä 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëéí 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëéì 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëéë 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëéê 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëéè 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëéç 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëéæ 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëéå 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëéä 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëèí 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëèì 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëèë 5HVэ(5-к*(<-эмнлэ9эхмэNэRKPф нллркднзрмий

5ëèé 5HVэ(5-к*(<-эйжйэ9эхйжнэNэRKPф нллркднзрмем

5ëèè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ëèæ 5HVэ(5-к*(<-эйжнэ9эхйжээRKPф нллркднзрмйм

5ëèå 5HVэ(5-к*(<-эйжкэ9эхйжэNэRKPф нллркднзрмжм

5ëèä 5HVэ(5-к*(<-эллкэ9эхллэNэRKPф нллркднзрмзж

5ëçí 5HVэ(5-к*(<-эеллэ9эхеплэNэRKPфэ

хйжнрйднэ0+]эRQO\ф

5HVэ(5-к*(<-эмлкэ9эхмлэNэRKPфэ хRWKHUэEDQGVф

5ëçì 5HVэ(5-к*(<-эмнйэ9эхмннэNэRKPф нллркднзрмжи

5ëçé 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ëçè 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ëçç 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

5ëçæ 5HVэ(5-к*(<-элжйэ9эхлжнэNэRKPф нллркднзрмжд

5ëçå 5HVэ(5-к*(<-эмнкэ9эхмнэNэRKPф нллркднзрмзк

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нллркднзрлиз

нллркднзрмзй

7-17

November 1998

Part No. 001-7600-001

PARTS LIST

Front Unit (All Models)7640 (UHF) Main Unit

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November 1998 Part No. 001-7600-001

7-18

Front Unit (All Models)

PARTS LIST

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

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7-19

November 1998

Part No. 001-7600-001

PARTS LIST

Chassis PartsFront Unit (All Models)

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-ì &RQQHFWRUý05ð'6ð(ýíì нллркднзржин

03ì лнииэ&KDVVLV нллркднзржим

03ë лнииэ)URQWэSDQHO нллркднзржии

03ê лнииэ)URQWэNH\эх$ф нллркднзржиз

03é лнииэ&RYHU нллркднзржиж

03è лнииэ0р3ODWH нллркднзржие

03ç 5XEEHUýVKHHWýõ$.ôðì нллркднзржид

03æ 3+ý%7ý0êý;ýåý1,ð=8 нллркднзржзн

03å лнииэ6SHDNHUэSODWH нллркднзржзм

03ä лнииэ6SHDNHUэQHWрм нллркднзржзл

03ìì ммлзэ75р$эFOLS нллркднзржил

03ìë 6SRQJHýõ)/ô нллркднзржик

03ìê 5XEEHUýVKHHWýõ$0ô нллркднзржий

63ì 6SHDNHUэ96рижрнекж$ нллркднзржзк

:6ì 3ì&+ нллркднзржзй

5HIý1Rï 'HVFULSWLRQ 3DUWý1Rï

жзйнэх8+)фэ&+$66,6э3$576

-ì &RQQHFWRUý05ð'6ð(ýíì нллркднзржин

03ì лнииэ&KDVVLV нллркднзржим

03ë лнииэ&RYHU нллркднзржиж

03ê лнииэ)URQWэSDQHO нллркднзржии

03é лнииэ)URQWэNH\эх$ф нллркднзржиз

03æ 3+ý%7ý0êý;ýåý1,ð=8 нллркднзржзн

03å лнииэ6SHDNHUэSODWH нллркднзржзм

03ä лнииэ6SHDNHUэQHWрм нллркднзржзл

03ìì ммлзэ75р$эFOLS нллркднзржил

03ìë 5XEEHUýVKHHWýõ$0ô нллркднзржий

63ì 6SHDNHUэ96рижрнекж$ нллркднзржзк

:6ì 3ì&+ нллркднзржзй

November 1998 Part No. 001-7600-001

7-20

7-21

November 1998

Part No. 001-7600-001

MP2 (C)

MP3 (C)

MP2 (F)

DS1 (F)

EP2 (F)

MP1 (F)

FRONT UNIT

W3 (F)

J1 (F)

MP7 (C)

MP1 (C)

MP7 (C)

MP4 (M)

MP1 (M)

MP2 (M)

MP13 (C)

MP7 (C)

MP5 (M)

MP6 (C)

MP7 (C)

MP11 (C)

MP12 (M)

W7 (M)

J5 (M)

MP6 (C)

MP5 (C)

MAIN UNIT (Bottom side)

MP3 (M)

MP7 (C)

J1 (C)

MP9 (C)

SP1 (C)

MP8 (C)

MP7 (C)

MP4 (C)

WS1 (C)

VHF (7610) EXPLODED VIEW

UHF (7640) EXPLODED VIEW

7-22

November 1998 Part No. 001-7600-001

←

← ←

←

FOLDOUT

(VHF Exploded View)

SECTION 8 - SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS

BAL

REF

DTCS

IC5

SCK SO PLST UNLK

x1 or x2

NWC

L26.L27

2nd Lo

PLLICREF

OSC

BALREF

FM DET

IC3

NOIS SD

FI3.FI4 or FI5

NWC

CERAMIC

BPF

DISC

IC2

LOOP FIL

VCO

C60.C61

Q7.Q8 D7.D8 L14

Q10

RIPPLE FIL

BUFF

Q4Q6

TX/RX SW

D5.D6

L23.L24

T5 T5

Q3 Q2 Q1 IC1

BUFF BUFF

PWR AMP

VCC

LPF

FWD

REV

RF DET

APC CTRL

VCC

IC6C Q17.18

D1.D2

LPF

ANT SW

D3.D4 D13.D14 L17.L18

L1.L2.L3

BPFBPFBPF

BPF

RF AMP

Q35

RF ATT

L19.D16

T1T2

Q12

T3T4

L22 D20.D21

L21 D18.D19

L20.D17

ATT

Q13

OLtS1

FI1 or FI2

IF AMP

Q14

XTAL BPF

MICIN

MICOUT IC4b

MMUT

AMP

IC7d

HPF

AFHPF

IC8

IC7b

DET

AF OUT

IC4a

AMUT

AMP

IC7a

MIC

IC7c

BUFF

LIMIT AMP

NWC

IC6b

AMUT

IC6d

AFON

MOD

IC4d

IC4c

BUFF

AF AMP

IC10

AFO

FAN

EX.SP

PTT

DET

AFO

HORN

DIM

DIM SW

HORN SW

SIG SW

Q34

Q32

Q33

DIMIN

HORNO

AFO DET IN

EXPTT

+5 REG

T5 SW

R5 SW

8V REGHVSW

Q26

PWON

Q36

Q27 R5C

Q28 T5C

Q29.Q30 PWON

IC9

CPU5

+5 REG

MIC

TEMP

VIN

PLST

DAST

EXST

EXEN

UNLK

NOIS

RFATT

DTCS

BEEP

TONE

BEEPOUT

BUSY

OPCS

OPINT

GND

CPU5V

GND

LVIN

SCK

DIMIN

EXPTT

PWON

DET

PTTIN

PTT

OPV1

OPV2

OPV3

OPT1

OPT2

OPT3

AFO

to FRONT

GND

MICMUTE

AFONOP

BEEPOUT

RXMUT

DET

AFOUT

REM

OPCS

OPINT

SCK

MICOUT

MICIN

BUSY

MOWN

SIGOUT

OPT1

OPT2

OPT3

OPV3

OPV2

OPV1

OPT

EXTONE

PTTOUT

PTTIN

MMUT CTRL

RMUT CTRL

SO SCK EXST EXEN

NWC

AFHPF

AFATT

HORNO

TMUT

T5C

MMUT

RMUT

IC11

MMR

D25

D26

EXP

CPU

VIN

TEMP

LVIN

DIMIN

EXPTT

PTTIN

UNLK

NOIS

RFATT

PWON

EXEN

EXST

DAST

PLST

SCK

BUSY

OPCS

OPINT

OPV1

OPV2

OPV3

OPT1

OPT2

OPT3

HANGER

MIC

PTT

AFO

CLONE

MIC

CLONE I/F

LPF

D/A

Q6 R33.R34.R35

BEEP MUTE

Q10

AMP

DET

DTCSIN

TONE

BEEPOUT

R605VQ7

BEEP

AF CH U/D.Etc

KEY X8

SW2-SW9

POSW

DIM CTRL

BACK LIGHT

Q3.D6DS2-DS11

DS1

LCD

POSW

KS0.KS1

KR0-KR3

DIM

SEG1-SEG32

COM1-COM3

CPU5 CPU5

RESET EEPROM

SHIFT CTRL

D5,C17IC3IC2.Q1

CPU5

MIC

TEMP

VIN

PLST

DAST

EXST

EXEN

UNLK

NOIS

RFATT

DTCSIN

BEEP

TONE

BEEPOUT

BUSY

OPCS

OPINT

GND

CPU5V

GND

LVIN

SCK

DIMIN

EXPTT

PWON

DET

PTTIN

PTT

OPV1

OPV2

OPV3

OPT1

OPT2

OPT3

AFO

to MAIN

FRONT UNIT

MAIN UNIT

IC1

LPF

A/D

COMMON LINE LINE RX LINE TX LINE DATA BUS LINE

BEEP

DRIVE AMP

BPF

CSHIFT

RESET

ECS

SCK

OSC2

OSC1

CTCIN

CLIN

CLOUT

HANG

MTONE

DTMF

CTDAO-CTDA2

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 40

VCC

GND

8-1

November 1998

Part No. 001-7600-001

VHF (7610) BLOCK DIAGRAM

VHF (7610) Transistor Basing Diagrams VHF (7610) Diode Basing Diagrams

8-2

November 1998 Part No. 001-7600-001

8-3

November 1998

Part No. 001-7600-001

VHF (7610) MAIN BOARD BOTTOM VIEW

FOLDOUT

→

8-4

November 1998 Part No. 001-7600-001

VHF (7610) MAIN BOARD TOP VIEW

8-5

November 1998

Part No. 001-7600-001

VHF (7610) MAIN BOARD SCHEMATIC

15.3MHz

3.6V

2.2V

RX:1.2V

RX:0V

RX:0.63V

RX:4.7V

RX:0V

7.7V

TX:0V RX:5.0V

TX:5.0V RX:0V

13.2V

5.0V (PMR)

LMR (only)

13.2V

5.0V

1 2 3 4 5 6 7 8 9

10 11

IC2 µPD3140GS

VCC1 IN1 ENB CLK DATA T1 LOK CP1 FI1 FO1

GND1

IN2

VCC2

GND2

CP2

FI2

FO2

C68

0.01

R49 EXB-V8V (1kx4)

C69

0.001

C70

47p

C71

47p

C72

47p

C73

0.001

R50

100

C74

20p(L-band)

9p(H-band)

C75 9p

(H-band only)

L16 32nH

C67

0.001

C80

12p

X1 CR-575

C79

56p

R51 100

C82 33p

D12

HVU17

R54 47k

C86

0.001

C85

2.2

R233 1k

R232 470k

R55

75k

C61

0.68

C60

2.2

R44 10

R43

2.2k

R46 10k

C59

0.1 C58

0.001

L15

2.7µH

Q9 DTC114EU

C57

0.001

D10 MA77

R37 1k

C281

0.001

R60

15k

C56

0.001

MA77

C54

100p(L-band)

56p(H-band)

C55

33p

L14 MC152-E558CN

-100024

HVU350

C53

1.5p

R36

8.2k

Q8 2SC4226

C51

0.001

R35

220

Q7 2SC4226

R34

8.2k

C52 2p

C50 0.001

R33

470

C62

0.001

R39

47k

C49

0.001

R381kR32

100

C63

R40

4.7k

Q10 2SC4081

D11

MA111

R45

2.2k

R41

C64

0.001

C65

0.001

R47

C66

0.001

R48

47k

Q11 2SK880

CP1

LVIN

REF BAL

PLST SCK SO UNLK

C48

0.5p

Q6 2SC4215

C47

0.001

R31

68k

L13

0.1µH

R30

680

C45

C44

0.001

R29

68k

L12

0.1µH

Q5 2SC4215

C46 22p

C43

12p

C42

0.001

R27

39k

L11

0.1µH

Q4 2SC4215

C41 18p

R25

4.7k

D6 MA77

D5 MA77

R24 100

C39 10p

R21

5.6k

R23

4.7k

C40

0.001

R28

470

R26

390

R22

100

R20

8.2k(PMR)

15k(LMR)

C38

0.001

R19

150

R246

150

C36 47p

R17

1.8k

Q3 2SC4215

C35

0.001

R15

100

Q2 2SC4215

R16

3.9k(PMR)

8.2k(LMR)

C37

0.001

R18

100

R14

0.12µH(L-band)

0.15µH(H-band)

C32

0.001

D29 DA221

C30

0.001 R11

27(PMR)

5.6(LMR)

R10

27(PMR)

5.6(LMR)

Q1 2SC4703

C29R12

560

C299

0.001

R13

2.2k

C31

470p C33 15p(PMR) 18p(LMR,L-band) 8p(LMR,H-band)

68nH

C28

470p

C27

0.001

C26

0.001

R9 56

C25

C24

C23

270

(PMR only)

R59 22k

R245

10k

MOD

NWC

Q16 DTA144EU

C147

0.01

C146

0.01

R110

47k

R108

22k

R109

10k

R107

22k

D23 DAN202U

D22 DAN202U

R105

15k

R106

15k

FI3 SFPC450G

C149

0.1

R104 10

FI4 SFPC450E

C148

0.1

R100

330k

C139

220p

C138 220p

R98

100k

C137

0.1

C136

R99

2.2k

(L-band)

3.3k

(H-band)

C135

0.01

OSCIN OSCOUT MIXOUT VCC IFIN DEC FILOUT FILIN

MIXIN

GND N-REC N-DET

RSSI

IFOUT

QUAD

AFOUT

1 2 3 4 5 6 7 89

R241

100k

C134

0.001

R96

1.8k

IC3 TA31136FN

R102

1.5k

C140 10p

L26

1µH

C141

18p

C142 4p

C143

12p

L27

1µH

C145

10p

C144 15p

X3 CDBCA450CX24

NOIS

C133

0.033 SD

R97 470

C132

0.001

C290

0.01

C131

100p

R95

1.5k

C130

0.01

Q15 2SC4081

C129

0.01

R93

10k

C128

0.01

Q14 2SC2714

C127

0.01

R92

470

R91

100k

R89 560

FI1b

FI2 SFPC450G

C126

11p

FI1a

C124

0.001

R87 820

C119

0.01

C120

0.001

C121

68p

L25

0.47µH

R86

220

C123

0.01

C122

0.001

Q13 3SK166

R83

10k

R81

100k

L24

0.1µH

C117

56p

C118 15p

C116

15p

L23 47nH

C107 1p

R84

100

R78

4.7k

C115

0.001

R77

100

L22

33nH

C112

15p(L-band)

8p(H-band)

D21

HVU350

C111

120p(L-band)

100p(H-band)

D20

HVU350

R74 100k

R76

C110

0.001

R75

C109

0.001

R73 100k

D19

HVU350

D18

HVU350

C106

120p(L-band)

100p(H-band)

C105

6p(L-band)

4p(H-band)

R72

100k

C104

0.001

C103

0.001

C102

0.01

R71

100

Q12 3SK239

C100

0.001

R69

C101

0.001

R67

10k

L21

33nH

R66

100k

C99

1.5p

L20

54nH

C98

9p(L-band)

6p(H-band)

C97

220p(L-band)

100p(H-band)

D17

HVU350

RFATT

R62 100k

C96

0.001

R641MR63

R61 100k

C95

0.001

C92

150p(L-band)

100p(H-band)

C91

4p(L-band)

1.5p(H-band)

L19

54nH

C90 4p

D15

1SS352

C89

D14

MI809

C286

0.001

Q35 DTA144EU

C202

0.001

R228

18k

L18 656LZ-09K

D13

MI809

C88

22p

C87

15P(PMR)

18P(LMR)

L17 656LZ-09K

VIN1 VOUT1 VOUT2 VIN2 VDD LD CLK DI VIN3 VOUT3 VOUT4 VIN4

VIN8 VOUT8 VOUT7

VIN7

GND RESET

VDAREF

VIN6 VOUT6 VOUT5

VIN5

IC5

M62363FP-650C 1 2 3 4 5 6 7 8 9

10 11 12 13

C176

0.01

R140

100

C177

0.01

C178

0.001 DAST

SCK

C179

0.001

C180

0.001

C181

0.001

R143 100k

R142 100k

R141 100k

C18210R145

10k

C183

0.01

R154

100k

-+8

IC7c NJM2902V

C283

0.0018

R223 33k

C284 390p

R146 68k

R151

10k

T1T2T3

R152

10k

DTCS

R177 47k

C184

2.2

R147

180k

R148

56k

C185

0.1

EXTONE

TONE

C186

0.1

R149

180k

R153

10k

R150 210k

R155

10k

C213

0.001

C187

0.01

R158

680k

IC7b NJM2902V

R156 680k

R157 12k

R159

10k

IC8b NJM2904V

R162 68k

C194

2.2

R161

470k

R163

C189

0.01

AFHPF

R160

15k

C190

0.01

R227 680k

C188

0.047

R164

4.7k

IC8a NJM2904V

R166

120k

R226

180k

C192

0.01

R170

R171

R230

2.2k

C196

0.1

R229 47k

AFOUT

DET

R172

15k

C197

0.1

MICIN

MICOUT

R165 47k

C294

0.01

R181

4.7k

R176

680k

C199

0.1

R174 680k

C198 15p

C20110R180

39k

R179

150k

MIC

R175 10k

C296

0.001

R235

10k

12-

R236 100k

C287 100p

R234

100k

D31 DA204U

R178 33k

IC7a NJM2902V

R238 18k

CPU5V

GND

OPINT

OPCS BUSY

BEEPOUT

TONE BEEP DTCS

RFATT

NOIS UNLK EXEN EXST DAST PLST

VIN

TEMP

MIC

5V AFO SI OPT3 OPT2 OPT1 OPV3 OPV2 OPV1 PTT PTTIN DET PWON EXPTT DIMIN SO SCK SD LVIN GND

R212 EXB-V8V (1kX4)

R213 EXB-V8V(1kX4)

R214 EXB-V8V(1kX4)

R215 EXB-V8V(1kX4)

R216 EXB-V8V(1kx4)

R217 EXB-V8V(1kx4)

R219 EXB-V8V(1kx4)

R218 EXB-V8V(1kx4)

C238

0.001

C236

0.001

C237

0.001

R247 47k

C247 47p

C246 47p

C245 47p

C244 47p

C243 47p

C242 47p

C241 47p

C240 47p

C252 47p

C253 47p

C254 47p

C292 47p

C251 47p

C250 47p

C249 47p

C248 47p

C256 47p

C255 47p

C257 47p

C258 47p

C259 47p

C260 47p

C261 47p

C262 47p

C263 47p

C264 47p

C265 47p

C266 47p

C267 47p

C268 47p

C269 47p

C270 47p

C285 47p

C291 47p

C200

0.22

R237 1k OPINT OPCS BUSY BEEPOUT

TONE BEEP DTCS RFATT

NOIS UNLK EXEN EXST

DAST PLST VIN TEMP MIC

AFO

OPT3 OPT2 OPT1 OPV3

OPV2 OPV1

PTTOUT

PTTIN

DET PWON EXPTT

DIMIN

SCK

LVIN

PTTIN PTTOUT MICOUT

MICIN

BUSY

SIGOUT

OPT1 OPT2 OPT3

OPV3

OPV2

OPV1

5V HV MICMUTE AFONOP BEEPOUT RXMUTE DET AFOUT REM OPCS OPINT SO SI SCK

EXTONE

R1871MR1881MR1891MR190

100k

R191

100k

R192

100k

C224

0.001

C225

0.001

STRB DATA CLK Q1 Q2 Q3 Q4 VSS

VDD

OENA

Q5 Q6 Q7 Q8

Q'S

IC11

BU4094BCFV 1 2 3 4 5 6 7 8

16 15 14 13 12 11 10 9

EXSTSOSCK

T5C

TMUT

R182

47k

D24 MA111

R222

47k

HORNO

AFON

AFHPF

NWC

EXEN

C203

0.01

D26 DAN202U

RMUT

MMUT

R183

100k

R184

100k

D25 MA111

TEMP

R186

100k

R185

NTCCF20124AH

(47k)

C282

D30

MA8082

R193

2.2k

R221 22

C204

220

1 2

R194

10k

C205

0.1

Q36 2SD1664

AFO

R129 560

C206 470

R195

10k

PWON

Q25 DTC114EU

R197

R196 47k

Q26 2SB1124

C207

C208

0.001

C210

0.001

C209

C212

0.001

C211

VGG

VDD

GND GND

IC1 SC-1364(PMR,L-band) SC-1365(PMR,H-band) M68702L(LMR,L-band)

C22

22p(L-band)

20p(H-band)

C20

22p(L-band)

20p(H-band)

C275

47p

C274

470p

C273

0.001

C272

0.001

C271

0.001

C297

470

C280

47p

C279

470p

C278

0.001

C277

0.001

C276

6.8

L4 LW-25R622

C16

470p

C17

0.001

R7 33

C18

470p

C19

0.001

Q38 2SD1664

R243

R242 470

0.5p

FWD

REV

C151

0.001

D2 1SS375

R167

4.7k

1.5k(PMR)

1.8k(LMR)

C7 470p

R112 100

C153

0.001

C155

0.001

D1 1SS375

C150

0.001

C152

0.001

C154

470p

R111 100

D3 MI407

C15

0.001

C13

36p(L-band)

33p(H-band)

C11

20P(PMR)

15P(LMR)

C10

15P(PMR)

12P(LMR)

12p(PMR only)

10p(L-band) 9p(H-band)

L3 LA253

L2 LA243

C36pC1

L1 LA253

82k

R119 100k

TMUT

R248

330k

C160

0.001

C159

0.001

R118 15k

R117

150k

R249

10k

Q19 DTC144EU

C157

0.001

Q23 DTC144EU

C298

R120

R116

4.7k

R115

10k

Q18 2SC4081

R114

680

C156

2.2

R113

3.9k

Q17 2SB1143

C175

0.01

R139

C174

0.01 REF

DTCS

BAL

R137

IC6c NJM2902V

Q21 DTC144EU

NWC

C173

0.001

C172 200p

R135 27k

R136 68k

C171

0.001

R211

2.2k

R169

2.2k

5 6

IC6b NJM2902V

R134

4.7k

C170

0.01

C169

0.01

I/O

O/I

I/O

CONT B

CONT C

VEE

VDD

CONT A

CONT D

I/O

O/I

I/O

12345678

910111213

MMUT

RMUT

MOD

C168

0.1

R131 68k

R130

10k

C167

0.01

R133

47k

BEEP

13 12

R127

100k

C165

0.01

R126

10k

R128 100k

C164 0.022

R125 10

AFON

AFONOP

R240

6.8k Q39 DTC144EU

D33 DAN202U

R123

6.8k

C163

Q20 DTC363EK

C293

0.1

R124

100k

C162

0.01

R122

75k

C161

0.1

2 3

IC6a NJM2902V

C166

2.2

R198

47k

Q27 2SA1588

R199

4.7k

R200

47k

R201

Q28 2SA1588

Q37 DTC144WU

T5C

PWON

R203

4.7k

Q31 DTC144EU

C215

654

123

Q30 XP6501

R202

10k

Q29 2SB1201

R204 1k

C216

100

C217

0.01

C218

0.01

IC9 S-81250PG-PD

C219

0.001

VIN

R206

100k

R205

300k

C220

470

D27

DSA3A1

C221

0.001

C222

470p

C223

47p

D32

RD20E

DIM

HORN

GND AFO GND DET GND

IN GND PTT

R220 100

SP1

to EXTERNAL SPEAKER

to FAN

for OPTIONAL CABLE

C235

0.001

C234

0.001

C233

0.001

C231

0.001

C226

0.001

C227

0.001

C228

0.001

GND

SP GND

TO SP

AF OUT

SP GND

VCC

GND

Q33 DTC114EU

D28 MA111

C230

0.22

R207

100k

R2101MR209

Q34 2SJ144

R208

C229 1

Q32 DTC114EU

DIMIN

HORNO AFO DET EXPTT

ANT

abc

acb

Q22 DTC144EU

R101

390

R90

1.5k

FI1 FL-285

R121

300k

IC6d NJM2902V

IC4 BU4066BCFV

R168 1M

C288

0.01

to FRONT UNIT J2

Q24 DTC144EU

IC10 LA4425A

C232

0.001

R251 PTH9C32

Q40 2SC4081

C301

0.001

R252 15K

CPU5

VCC

AFREF

C113 5p

C93 1P

D16

HVU350

DAREF

C4 470P

VHF MAIN UNIT

L5 LA253

1234

M68702H(LMR,H-band)

L6L7

R42 560

T5 5V

AFREF

C295

0.001

CPU5

for OPTIONAL UNIT

130

15 16

C191

0.01

10nH(LMR,H-band only) 47nH(Others)

18p(LMR,H-band only) 22p(Others)

18p(PMR,L-band only) 12p(H-band)

36p(PMR,L-band only) 27p(H-band)

18p(LMR,L-band) 8p(PMR,L-band) 12p(H-band)

1k(PMR) 100(LMR,H-band) 330(LMR,L-band)

15k(LMR,L-band only)

4.7k(Others)

22(LMR,L-band only) 10(Others)

NOTE: All 7610 Models are LMR (U.S.A.), H-Band (146-174 MHz).

8-6

November 1998 Part No. 001-7600-001

FOR

REV

T8V

R8V

RFATT

T1T2

D3,D4,D5

D7D8

R8V

D13

N/W SW

T3T4

D9D10

FI1

46.35MHz

FI2

FI3

NWC

D12

DET AFOUT

IC6C,D

Q22

IC4A

RMUT TXC

IC12

IC11 IC11

Q32

IC9

1 2

MIC

AFO

MICIN

MICOUT

IC8B

MMUT

AFATT

IC6B

IC11 IC11

BEEP

IC8A

IC7A

MOD

AFON

IC7B

AFHPF

T1 T2

NOIS SD

N O I S I N

DTCS

TXC

Q30Q28

LVIN

Q33

Q24 Q26 Q27

N O I S O U T

8V 8V

Q23,D20,D34

Q25,D22,D33

D21

2nd Lo

T8V VCC

IC5

Q19

T8V

Q20

T8V

Q21

D18,D19

VCC

APCV

IC4B Q17 Q18

PWON

IC3

Q14 Q15

IC2

8VREF

Q10 Q11 D15

DTCSOUT

CPU5V

MOD

+5V

Q29

IC10

REF

Q34

DTCSOUT

5V 8V

TCXO

15.3MHz SO SCK PLST UNLK

L32,L33

SCK DAST

T3 T4

3 10 11

EXP

IC13

SO SCK EXST

NWC

AFHPF

AFATT

HORNO

TMUT

TXC

EXEN

45.9MHz

2nd Lo

TXC

Q35

TXC

NWCTONE

SIGOUT

MAIN UNIT

DTCS

FRONT UNIT

AF,CH U/D,Etc

DS2-DS11

DS1

N O I S

SDV

I N

L V I

EXPTT PWON RFATT

CTDA0 CTDA2

DTCSIN

D I M

DIMIN

O P T I O N

B U S

T E M P

TEMP

DET

VOLT

DET

VCC

CPU5

RMUT

CPU5V

RMUT CTRL

D24,Q37

R8V

T8V

TXC

R8V

+5V

CTRL

Q12 Q13

T8V

Q8 Q9 D14

CPU5V

MMUT

MIMUT

RXMUT

MMUT CTRL

D25,Q46

TMUT

COMMON LINE

LINE

RX LINE

TX LINE

DATA BUS LINE

DIM HORN

DISC

AFO

IN PTT

DIM

Q38

HORN

Q39

1 2 3 4 5 6 7 8 9 10 11

OPV1 OPV2 OPV3 GND OPT3 OPT2 OPT1

BUSY AUX

SCK SI SO

GND

15 16

17 18 19 20 21 22 23 24 25 26 27 28 29 30

SIGOUT

MICIN MICOUT PTTOUT PTTIN

MIMUT

AFON

BEEPO

RXMUT

DET

AFOUT

REM

MDWN

OPCS

OPINT

HORNO

DIMIN

SCK SI SO

BUSY OPT1 OPT2 OPT3 OPV1 OPV2 OPV3

OPINT OPCS

PTTIN

PTT

RES

POSW

CPU

IC1

SHIFT

HANG

IC2,Q1,D1

CLIN CLOUT

Q4,D2

PTTIN

CPU5V

HANGERHANG

POSW

Microphone

SWITCH x8

AFO MIC

DET

CLONE

D T M F

M T O N E

C T C I N

TONE

CONV

BEEP BEEPO

MUTE

Q10

B M

EE PROM

IC3

UT-96

OPTION

EXPTT

SIGOUT

DET

AFO

UT-105

SIG

Q40

LPF

LPFLPF

TX/RX

BPFBPF

AMP

BPFBPF

MCF

FM IC

IC1

AMP

REG

POWER

REG

R8V

APC

CTRL

APC DET

RF ATT

LPT

PWR

AMP

DRIVE

AMP

BUFF

YGR AMP

TX/RX

LPF

BUFFBUFF

RX VCO

VCO SW

VCO

LOOP

FIL

PLL IC

BUFF

BPF

D/A IC12

AMP

HPF

SHIFT

AF SW

D/A

AMP

AF AMP

MUTE

AMP

LIMIT AMP

BUFF

SUPRA-

TTER

N/W SW

AF SW

BACK

LIGHT

LCD

LED CTRL

MIC

LPF

CLONE

I/F

RESET

CONV

UHF (7640) BLOCK DIAGRAM

8-7

November 1998

Part No. 001-7600-001

UHF (7640) MAIN BOARD BOTTOM VIEW

FOLDOUT

→

8-8

November 1998 Part No. 001-7600-001

C194

R65

R113

R112

Q17

R66

R69

C92

C91

MP10

D28

D16

RED

BLK

C196

R173

C195

C84

Q18

Q14

IC3

C81

C79

C101

L17

C304

L19

R70

C100

C80

C74

IC2

IC9

C76

C70

Q12

Q13

DET

W12

CPU5

C298

R58

C77

TMUT

C78

C67

C68

C325

C326

C327

C328

C206

C238

C75

C71

C281

R206

R205

R204

C232

IC13

D25

D24

Q37

C212

TXC

EXTM

C289

C207

C234

C235

C236

R208

C287

Q39

Q38

C288

R223

R232

C334

C335

C177

C239

C279

R236

R245

R237

R246

R238

R247

R239

R248

C274

C264

C273

C263

C272

C262

C271

R251

R267

R186

C333

C225

R198

Q36

IC11

R258

C332

C331

C349

Q40

R155

R153

R265

C176

R107

R108

R96

R97

Q22

C134

R109

C133

R146

R148

C211

R111

R110

C209

C213

R191

R187

R188

R189

R190

CP1

C199

C198

L26

L23

MP1, 2

W11

W10

C342

C97

C286

L16

C93

C13

C329

Q44

Q45

C330

C314

C315

C17

C18

C309

C310

C348

R17 C317

L10

C313

R20

C311

L11

C167

C141

R115

R116

C142

Q23

C143

R117

C144

C346

R140

C145

R135

R134

C161

R139

R138

C165

L31

C164

C162

L30

Q30

R136

C163

R123

C150

C151

R125

R124

Q25

C152

C153

C154

C312

L14

C45

C44

L13

R32

C303

FI1

FI2

FI3IC6

R95 R96

R94

C126

C127

R99

C129

R100

C128

R147

C130

R101

R47

R45

R44

C61

C63

C58

R48

C57

C62

R46

R40 C56

R41

C52

IC1

C51

C50

R36

C49

L15

FI1

C282

C295

C242

C241

C178

R213

R214

R215

R218

R217

R216

J2 (To Spkr)

J5 (To Opt Cable)

2 - Gnd 1 - HV

1 - 8V 3 - CPU5V

5 - GND 7 - OPINT 9 - OPCS 11 - BUSY 13 - BEEPOUT 15 - TONE 17 - BEEP 19 - DTCS 21 - RFATT 23 - NO IS 25 - UNLK 27 - EXEN 29 - EXST 31 - DAST 33 - PLST 35 - VIN 37 - TEMP 39 - MIC

11 - PTT 10 - GND 9 - IN 8 - GND 7 - DISC 6 - GND 5 - AFO 4 - GND 3 - HORN 2 - DIM 1 - HV

2- 5V 4 - AFO 6 - SI 8 - OPT3

10 - OPT2 12 - OPT1 14 - OPV3

16 - OPV2 18 - OVP1 20 - PTT 22 - PTTIN 24 - DET 26 - PWON 28 - EXPTT 30 - DIMIN 32 - SO 34 - SCK 36 - SO 38 - LV IN 40 - GND

J3 (To Front Unit)

30 - GND 29 - 5V 28 - HV 27 - MICM UTE 26 - AFONOP 25 - BEEPOUT 24 - RXMUTE 23 - DET 22 - AFOUT 21 - NC 20 - OPCS 19 - O P IN T 18 - SO 17 - SI 16 - SCK

1 - PTTIN 2 - PTTOUT 3 - MICOUT 4 - NC

5 - BUSY

6 - NC 7 - NC

8 - SIGOUT 9 - OPT1 10 - OPT2 11 - OPT3 12 - GND 13 - OPV3 14 - OPV2 15 - OPV1

J4 (To Optional Unit)

2 - SPGND 1 - SP

EP12

VCC

GND

IC5

MP8

C95

EP2

C99 C98

C337

EP2

C96

C285

C94

ANTENNA JACK

UHF (7640) MAIN BOARD TOP VIEW

8-9

November 1998

Part No. 001-7600-001

UHF (7640) MAIN BOARD SCHEMATIC

15 14 13 12

OPT2 OPT1

AUX

MIC IN

SIG OUT

OPV1 OPV2 OPV3

BUSY

MIC OUT PTT OUT

PTT IN

3 2 1

11OPT3

GND

17 18 19 20 21 22 23 24 25 26 27 28 29 30

SCK SI SO OPINT OPCS

AF OUT DET RXMUT

AF ON MIMUT HV 5V GND

TO OPTION UT-96 UT-105

BEEPO

DC CABLE

EP3

GND

VCC

C84 470

D16 DSA3A1

C83 0.1

C82 0.01

D28

RD20E

R59

10k

Q14 2SJ377

R60

470

Q11 DTC114EU

C77

0.001

C75

IC2 TA7808F

C74

220

C73

0.1

C80

0.1

C78

123

654

Q12 2SB1132

R58

4.7k

Q13 XP6501

C81

0.1

IC3 AN78L05M

C79

CPU5V

PWON

R112 330k

R113

100k

VIN

R56

4.7k

R57 4.7k

Q10 2SD1664

D15 1SS302

C70 47P

C71 10

Q15 DTC114EU

C72 1

R54

4.7k

R55 4.7k

Q8 2SD1664

D14 1SS302

C67 47P

C68 10

Q9 DTC114EU

D31 DAN202U

C69 4.7

TXC

TMUT

D13 DAN202U

FI2 CFWM450E

FI3 CFWM450G

D12 DAN202U

R52 22k

R51 12k

R50 22k

R53 15k

T8V

R8V 5V

Q7 DTA144EU

NWC

R49

15k

C65

0.01

C66 0.01

OSCIN OSCOUT MIXOUT VCC IFIN DEC FILOUT FILIN

16 15 14 13 12 11 10 9

MIXIN

GND N-REC N-DET

RSSI IFOUT

QUAD AFOUT

IC1 TA31136FN

C64

0.1

R48 1.5k

R42

100k

C63

0.1

R46 100k

C61

270p C62 270p

R44 820

R45 330k

R41

470

C59

0.001

C60 0.01

NOIS

R38 47k

R39 47k

C55 0.001

C56 0.001

R37

1.2k

C54

0.001

Q5 2SC4081

C52 100p

R47

C57

4.7

C58

0.001

X1 CDBCA450CX24

R40

2.2k

C51 100p

Q4 2SC4215

L15

0.18µH

R32

100

C50 68p

C303 0.001

C48

0.001

R34

330

C301

FI1 FL-287

C300 4p

C47 12p

R33 330

C46

0.001

L14

56nH

L13

0.12µH

R36

100

C49 0.001

C45 68p

C44 0.001

R31 22

Q2 2SK272

R25 100k

C22 6p( L ) 5p( ML,H ) 4p( MH )

R15 47k

L12

39nH

C42 3p

R27 270

R28 18

R29 270

R25

100k

C34

7p( L )

6p( ML )

4p(MH/H)

R11

220k

C309

47p

C19

0.001

HVU350

C23 2p ( L )

1.5p(ML/MH)

L7 15nH

C37 1p ( L )

0.3p(Other)

C36

0.5p

R24 10k

C312 47p

C40

47p

D10

HVU350

R23

220k

C39

7p( L )

6p( ML )

5p(Other)

L10

15nH

4.7*H

R20

2.2k

C33 47p

C32

1p ( H )

1.5p( ML )

2p ( MH )

C348

0.22

Q3 2SK241

R30 68

C43 0.001

C308 1p

R18 68

C29

L8 15nH

C31 0.001

R22 10k

C311

47p

C35

47p

HVU350

R21

220k

R12

10k

C28

1.5p( L )

0.5p(ML/MH)

C313

47p

C25

C24

1p ( L )

0.5p(Other)

L11 15nH

C41 1p

R13 220k

C310

47p

C27

47p

HVU350

R14 10k

C26

7p( L )

6p( ML )

5p( MH/H )

C20

1.5p

1SS352

R10

4.7k

C21

47p

Q1 DTA144EU

RFATT

C315

47p

C314

47p

MA77

C18

2.5p

L5 Y655LY-03K=P3

MI809

C17

D3 MI407 ( ) UM9410F( )

L6 LW-25

C16

470p

R9 220

220

C15

47p

C13 47p

C12

5p(Other)

4p( -MH)

3p( -MH)

L3 LA-382

C10

9p(L,ML)

8p( -MH/H)

6p( -MH)

C11 2p( L ) 1p(Other)

C8 0.001

FOR

REV

0.001

R5 100 R2 1

D1 MA713

100R3100

0.001

R1 100k

R7 47

ANTENNA

CPU5V MIC 8V

CPU5V

TEMP

R110 NTCCF20124AH(47k)

R111

100k

2 3

IC6a NJM2902M

R109 10k

C135 2.2

C134 0.001

R108 12k

C133 0.1

R107 100

C132

0.56 6

IC7b NJM2904M

R104 22k

C131 470p

R106 270k

R105

22k

R103

220k

DET

AFOUT

R102 1

C130

0.047

R101

4.12k

C129

0.047

R100

36k

C128

0.047 +

8 IC6c NJM2902M

R99

2.2k

C127

0.047

C126

0.047

IC6d NJM2902M

R94 1.5k

R96

91k

C307 4.7

R270 1M

Q42 DTC144EU

TXC

R97

47k

R98

47k

AFHPF

Q22 2SC4081

C342

0.001( only)

TXC

C329

47p

Q44 DTC144EU

Q45 DTA144EU

C339

0.001

( only)

C298

47p

5V HV T8V R8V

R84

C118

470p

R85

10k

D18

MA77

R86

C120

470p

R87

10k

C121

10p

D19

MA77

R83

4.7k

C117 47p

R81

4.7k

C347

0.001

( only)

R82

2.7k C116

0.001

R80

220

Q21 2SC5107

R79

L21

C115

0.001

R77

3.3k

C113 7p

C338

R78

1.5k C112

0.001

R75

100

Q20 2SC5107

R76

L20

18nH

C111

0.001

C109 6p( ) 7p( )

C108

C106

7p ( only)

C110

0.001

C297

47p

C107

470p

D17 DA221

C105

470p

R71

Q19 2SC4703

L18

22nH

C103

C102

R72

C324

47p

C104

470p

R74

220

R73

2.2k

R70 2.2

C336

47p

L19 15nH

C304

12p

C100

C99

47p

C98

0.001

L17 18nH

C101

EP2

IC5

C286 47p

C285 0.001

C97 47p

C96 0.001

C344 0.001

C343 0.001

C95 22

C337 2.2

C93

L16 LA-242(Other) LA-232( -MH, -H)

C91

4.7

Q18 2SB1143

R67

4.7k

R69 150

C9210C90

0.1

Q17 2SC4081

R66

68k

R65 68k

C89

0.001

6 5

R64 150k

C87 47p

R273

820k

C88

0.022

TMUT

D30

MA111

C86

47p

R62

18k

R271 10k

R63 1M

R61

18k

C85

0.001

C302

0.001

C119

0.001

C345

0.001 D23

MA111

R137

4.7k

Q31 2SC4081

C167

C166

0.001

R133

R140

270

R139 18

R138

270

C165

L31 18nH

C164

C162 6p

L30 27nH

Q30 2SC5110

C163

0.001

R136

220

R135

4.7k

R134

4.7k

C161

470p

Q29 2SC5107

C160

R131

220

R272 1k

R132

180k

C159 2p

C158 12p

C157

470p

Q28 2SC5107

L28

27nH

R130

150k

R129

C156

470p

R128 10

C295

0.1

C145

47p

C144

0.001

Q23 2SC5110

C146

0.5p

L24 1µH

R118 1k

Q24 DTC114EU

Q27 DTC144EU

C296

0.1 C341

0.001

TXC

Q26 DTC114EU

C340

0.001

R126 560

L27 1µH

C155

0.5p

C346

C154

47p

C153

0.001

Q25 2SC5110

R123 4.7k

R124 4.7k

C151

5p( L )

2p( M )

8p( H )

C152

8p(L/MH)

4p( ML )

3p( H )

C143

12p( L )

8p ( ML )

6p ( HH )

5p ( H )

R117 1

R116 6.8k

R115 6.8k

C142

10p( L )

6p ( ML )

5p ( MH )

3p ( H )

C139 8p( L ) 6p( ML ) 4p( MH/H )

R125 10

L23 MC152-E558ANA-100051=P3

C141 18p( L ) 15p( ML/MH ) 12p( H )

R275

D34

HVU350

D20

HVU350

L22

0.56µH

R114 10

C148 5p(L,MH) 4p(ML/H)

C149

R274

D33

HVU350

D22

HVU350

L25

0.18µH

R121 47

L26 MC152-E558ANA-100051=P3(L,ML) MC152-E558ANA-100050(MH, -H )

C150 10p( L ) 8p ( ML ) 15p( MH ) 4p ( H )

R276

C147 1p

R120

100k

D21 1T365

R122

10k

C138

0.001

C188

4.7

C137

470p

C293

0.001

R260

12k (MH only)

8.2k(Other)

SP1

CHASSIS

SP JACK

C197

0.001

AFO

C196

0.001 R172 10k

R173 10k

C195 470

C194

220

IC9 LA4425A

R255

10k

C281

0.1

AFO

C291

0.1

C292

0.047 R259 22k

C193

0.1

R169 1k

Q32 DTC144EU

D32

MA111

Q41 DTC363EK

R170

6.8k AFON

BEEP

R165

10k

C190

0.1

R167

100

R168 100k

C322

0.22

R166

10k

C191 0.012

D29 DAN202U

AFATT

R160

47k

C187

0.1

R261

100k

R164

47k

C189

0.1

R163

10k

IC4a NJM2904M

IC8a NJM2904M

C349

0.22

R156

56k

R155

10k

R157 1.2M

C184 22p

R264

10k

R158

15k

R258 47k

C185

0.1

C186

0.1

VCC

R159

33k

MICIN

MICOUT

R265 10k

Q46 DTA144EU

R153

10k

C334

47p

IC8b NJM2904M

C180

0.0039

R152

5.6k

R266

10k

R150

100

C282

C319

0.1( )

0.0047( )

R279

82k( only)

R162 470k

C179

0.1

R161 470k

R148 100k

R147

10k

R146 82k

R144 22k

R145 75k

C174

0.1

C175

0.1

C176

2.2

R141 10k

R268

10k

R269 39k

R142 10k

TONE

DTCS

C335 47p

C323

10p

W13W16 W15 W14

C173 12p

L32

0.56µH

C170

C171 4p

C172 5p

L33

0.56µH

C169 12p

R127

4.7k

1 3 5 7

9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

5V AFO SI OPT3 OPT2 OPT1 OPV3 OPV2 OPV1 PTT PTTIN DET PWON EXPTT DIMIN SO SCK SD LVIN GND

CPU5V

GND OPINT OPCS BUSY

BEEPOUT

TONE BEEP

DTCSIN

RFATT

NOIS UNLK EXEN EXST DAST PLST

VIN

TEMP

MIC

R235 1k

R226

R234

R225

R233

R224

R232

R223

R231

R222

R230

R221

R229

R220

C284

47p

C279

47p

C269

47p

C278

47p

C252

47p

C243

47p

C253

47p

C244

47p

C254

47p

C245

47p

C255

47p

C246

47p

C256

47p

C247

47p

C257

47p

C248

47p

C258

47p

C249

47p

R252

R236

R240

R245

R249

R237

R241

R246

R250

R238

R242

R247

R251

R239

R243

C270

47p

C268

47p

C277

47p

C267

47p

C276

47p

C266

47p

C275

47p

C265

47p

C274

47p

C264

47p

C273

47p

C263

47p

C272

47p

C262

47p

C271

47p

OPINT

OPCS

BUSY

BEEPO

TONE

BEEP

DTCS

RFATT

NOIS

UNLK

EXEN

EXST

DAST

PLST

VIN

TEMP

R228

1kC259 47p

R219

1kC250 47p

R218 1M

C260

47p

C251

47p

C261

47p

R248

LVIN

SCK

DIMIN

EXPTT

PWON

DET

PTTIN

PTTOUT

OPV1

OPV2

OPV3

OPT1

OPT2

OPT3

AFO

IC12 M62363FP-650C

VIN1

1 2 3 4 5 6 7

24 23 22 21 20 19 18

EXST SO SCK TXC TMUT

EXEN

R206

100k

C232

0.01

NWC AFHPF AFATT

HORNO

R227 1k

R213 100k

R214 100k

R215 100k

R216 1M

R217 1M

C241

47p

C242

47p

C240

0.001

C239

0.001

D25 MA111MM

D24 DAN202U

Q37 DTC144EU

R205

10k

R204 10k

RMUT

IC13 BU4094BCF

STRB DATA CLK Q1 Q2 Q3 Q4 VSS

VDD

OENA

Q5 Q6 Q7 Q8

Q,S

1 2 3 4 5 6 7 8

16 15 14 13 12 11 10 9

VOUT1 VOUT2 VIN2 VDD LD CLK DI VIN3 VOUT3 VOUT4 VIN4

VIN6 VOUT8 VOUT7

VIN7

GND RESET

VDAREF

VIN6 VOUT6 VOUT5

VIN5

817

916 10 15 11 14

C328 47pC231 0.001

C326 47p

C327 47p

C325 47p

C227 0.01

C228 0.001

C229 0.001

C230 0.001

T1 T2

DAST SCK SO

T3 T4

R199

470

DTCS

14 13 12 11 10 9 8

VDD CONT A CONT D

I/O O/I O/I I/O

1 2 3 4 5 6 7

I/O O/I O/I I/O CONT B CONT C VEE

IC11 BU4066BCF

TXC

R198

10k

Q36 DTC144EU

RMUT

C333

47p

C225

0.01

2 3

R194 180k

C223 12p

C321

47p

C221

0.0027

R195 220k

Q35 2SC4081

C332

47p

NWC

R278

10k

R154

100

C183

0.1

R254

470k

C306

47p

R193

470k

R143

C222

18p

C177

0.001

C178

47p

R209

100k

C238 10

R212

R210

D27 MA111

R211 100k

VCON GND

X2 CR-601

VCC OUT

124

R267

270k

R186

100k

C206

C212

4.7

R162

C211

0.1

C215

R184

2.7k

C214

C208

0.0047

C209

0.001

C210

2.2

L34 18nH

R191

C213

0.001

201918171615141312

GND1

IN2

VCC2

GND2

CP2

FI2

FO2

123456789

VCC1

IN1

ENB

CLK

DATAT1LOK

CP1

FI1

FO1

IC10 µPD3140GS

C318

10p

C205

0.001

C198

R178

100k

C216 22p R188 1k R189 1k R190 1k

PLST SCK SO UNLK

R187 1k

C217 22p

C218 22p

C219 0.001

C207

470p

C316

47p

C299

47p

LVIN

R185

100

R177 68k

CP1

C200

0.001

Q33 2SK880

Q40 2SJ144

C199

0.001

R175

10k

R176

R181 1k

C204

0.47 Q34

2SK536

C203

0.47

R1791kR180

10k

C201

0.1

C202

0.022

R174

470

J6 HV GND

HORN GND AFO GND DISC GND IN GND PTT

J5 HV DIM

C233

0.001

C235 0.001

AFO

C289 0.001

C288 0.001

C287 47p

C234 0.001

DIMIN

HORNO

Q38 DTC144EU

Q39 DTC144EU

R207 1k

C237 1

EXPTT

DET

R257 47

R208 10k C236 0.1

IC4b

W10

W12

W11

SIGOUT

C76

0.1

R19 10

R17 100k

C30

0.001

C317 47p

R16 47k

Q16 DTC144EU

C283

470p

IC6b NJM2904M

AFREF

R95

47K

C330 47P

R151

180k( ) 220k( )

to Front unit J2 Through W3 of front unit

C226

0.01

C331

470P

R35 120K

FI1b

FI1a

TX:0V RX:6.6V

C94

6p( -ML) 4p( -MH) 3p( L, -ML) 5p( -MH) 1p( -H)

C14 5P( ) 4P( -L,ML) P ( -MH)

7p(L/ML) 6p( -MH/H) 5p( -MH)

CHASSIS

( only)

R277 470

( -L/ML/MH only)

6p( / -H) 7p( -L,M)

22( -H only) 33(Other ) 39( -L only) 27(Other )

( only)

R68

2.2k

3.3k( -ML only)

3.9k(Other )

2.7k( -ML only)

3.3k(Other )

10( ) 47( )

1p(MH only)

3.5p(H only)

( only)

0.001

( only)

Wide:oV Narrow:4.8V

IC7a NJM2904M

to DC FAN

to Optional OPC-617

P L

C38

2.5µ( )

1.5p(ML/MH)

0.5p(H)

2.5p(H only) 4p(Other)

0.75p(H only)

1p(Other)

P L L

2P( -H only) 8p(Other)

Y655LY-02M=P3 ( -H only) Y655-03K (Other)

3p( -LML) 4p( -MH, -ML/MH) 6p( -L) 5p( -H)

P P L L

L L

P P L

L P

LA382( -H only) LA232(Other)

LA-382( -H only) LA-232(Other)

SC-1322( -L) SC-1323(Other ) SC-1236( -L) SC-1237( -ML) SC-1325( -MH) SC-1326( -H)

P L L L L

P L

8p( -MH,other ) 7p(Other , -H)PLPL

LP P

39( -L only) 27( -H only) 33(Other)

P L

7p( ) 8p( -H) 10p(Other)

7p( ) 5p( -H) 6p(Other )

P L

18nH( -H

only)

22nH(Other)

100( ) 10 ( )

P L

L P

R119

Note

-L :PMR L-band

-L :LMR L-bandP

L L

P -ML:PMR ML-band

-ML:LMR ML-band

-ML:PMR MH-band -MH:LMR MH-band

-H :LMR H-band

L L

NOTE: All 7640 Models are the LMR (U.S.A.) type.

7.9V

13.6V

4.5V

5.0V

TX:7.9V RX:0V

TX:8.5V RX:0V

TX:0V RX:7.9V

TX:0V RX:8.5V

TX:4.7V RX:0V

13.6V

3.4V

2.4V

5.0V

6.7V

13.6V

1.1V

3.9V

7.8V

3.9V

MEASUREMENT CONDITIONS DIGITAL MULTIMETER INTERNAL RESISTANCE:50kΩ/V IC-F420(LMR):f=460.1MHz,TX POWER=35W IC-F410(PMR):f=455.1MHz,TX POWER=25W VOLTAGES INDICATED WITH(*)MARK ARE CHANGED WITH THE FREGUENCY AND POWER.

1.8V

Wide:5.1V Narrow:0V

WIDE:0V NAR:4.9V

5.0V

Wide:0.6V Narrow:0V

TX:0V RX:0.7V

TX:0V RX:7.3V

0V RX:APPROX. +3VdBm

TX:0V RX:7.9V

RX:2.3V

RX:2.2V

TX:0V RX:0.9V

TX:0V RX:7.7V

TX:0V RX:2.5V

RX:2.3V

TX:0.7V RX:0V

(*)TX:3.2V RX:2.8V

(*)TX:11.5V RX:13.3V

(*)TX:2.1V RX:0V

(*)TX:2.8V RX:2.7V

(*)TX:0V RX:2.9V

(*)TX:2.9V RX:0V

6.8V

0.7V

2.8V

2.5V

6.7V

7.9V

(*)TX:9.1V

RX:0V TX:8.9V RX:0V

TX:7.4V RX:0V

TX:1.7V RX:0V

TX:2.3V RX:0V

TX:7.6V RX:0V

TX:Approx. +7dBm

2.1V

7.6V

(*)TX:3.3V RX:3.2V

(*)TX:2.8V RX:2.7V

1.0V

1.9V

0.34V p-p

2.5V

5.0V

2.4V

2.2V

WIDE:0V NAR:0.6V

5.1V

TX:4.7V RX:0V

TX:0V RX:5.1V

RX MUTE:0V

4.9V

5.1V

RX MUTE:

5.1V

2.0V

TX:2.0V RX:5.0V

TX:2.0V RX:3.8V

2.4V

TX:0V RX:7.8V

TX:4.7V RX:0V

DTMF

3.5V p-p

5 TONE

3.2V p-p

CTCSS

0.7V p-p

15.3MHz

3.1V

TX:0V RX:0.7V

RX:2.9V

2.4V

5.1V

3.4V

6.4v

DTCS

0.85V p-p

(PMR only)

(LMR only)

8-10

November 1998 Part No. 001-7600-001

V-DN

V-UP

DS4

DS3

DS2

DS5

DS7

DS6

DS8

PWR

DS9

DS1

DS10

DS1

R60

J1 (To Microphone)

1 - 8V

3 - AFO

5 - MICE

7 - GND

2 - Clone

4 - PTT

5 - MIC

7 - Hanger

R51 R52

R61

C16

C73

C11

R53

C18

C19

C13

R63

C21

C79

R64

R62

C14

C20

R43

C17

C67

C65

C66

C80

C62 C61 C60

C54

R71

R65

R66

C77

C78

C72

C55

C53

R54

R67

C50

C49

R70

C64

C63

R19

C57

C52

C44 C22

C24

C56

C23

C59

C48

C25

C47

R16

R12

R18

R33

R34

R32

R35

R36

C40

C41

C42

R37

R38

R56

C43

C71

C46

C70

C10

R11

C36 R28 R25 R24

R27

R26

C38 R30 C39

R29

R31

R40

R39

R68

R58

C45

R42

R49

R41

C29

R20

R50

C82

C33

C30

R69

R57

C34

C32

R21

R22

C35

C58

C69

C27

C26

R59

C28

R55

R15

C15

R14

C12

IC3

IC2

IC1

R45

R44

R48

R46

R17

+ +

C14

R47

+ +

C37

Q10

100

26 50

J2 (To Main Unit)

40 - 8V

38 - CPU5V

36 - GND

34 - OPINT

32 - OPCS

30 - BUSY

28 - BEEPOUT

26 - TONE

24 - BEEP

22 - DTCS

20 - RFATT

18 - NOIS

16 - UNLK

14 - EXEN

12 - EXST

10 - DAST

8 - PLST

6 - VIN

4 - TEMP

2 - MIC

39 - 5V

37 - AFO

35 - SI

33 - OPT3

31 - OPT2

29 - OPT1

27 - OPV3

25 - OPV2

23 - OVP1

21 - PTT

19 - PTTIN

17 - DET

15 - PWON

13 - EXPTT

11 - DIMIN

9 - SO

7 - SCK

5 - SO

3 - LVIN

1 - GND

VHF/UHF FRONT UNIT BOARD TOP VIEW

VHF/UHF FRONT UNIT BOARD BOTTOM VIEW

8-11

November 1998

Part No. 001-7600-001

LIGHT ON :7.5V LIGHT OFF:5.5V

5.0V

4.9V

3.9V

1.7V

5.0V

7.6V

5.0V

MEASUREMENT CONDITIONS DIGITAL MULTIMETER:50kΩ/VDC OSCILLOSCOPE :20MHz

3.2V

2.3V

1.4V

6.8MHz

4.2V

2.3V

0.4V

DTCS

0.7V

CTCSS

2.35V

4.0V

0mV

-70mV

70mV27.5mV

BEEP IS SET

-27.5mV

0mV

3.3V

0.5V

1.9V

TX:5.0V RX:0.2V

5.0V

123456789

101112131415161718192021222324

51525354555657585960616263646566676869707172737475

76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

100

VCC PDO/SEG41 PD1/SEG42 PD2/SEG43 PD3/SEG44 PD4/SEG45 PD5/SEG46 PD6/SEG47 PD7/SEG48 PE0/SEG49/M PE1/SEG50/D0 PE2/SEG51/CL2 PE3/SEG52/CL1 AVCC TONEM TONED VTREF AVREF PB7/AN7 PB6/AN6 PB5/AN5 PB4/AN4 PB3/AN3 PB2/AN2 PB1/AN1

PB0/AN0

AVSS

TESTX2X1

VSS

OSC1

OSC2

RES

NMI

P20/IRQ4/AOTRG

P21/SCK1

P22/SI1

P23/SO1

P24/SCK3

P25/RXD

P26/TXD

P27/IRQ0

P17/IRQ3/TMIF

P16/IRQ2

P15/IRQ1

P14

P13/TMIG

P12/TMOFH

P11/TMOFL

P10/TMOW

VSS

VCC

PA3/COM4

PA2/COM3

PA1/COM2

PA0/COM1

P50/WKP0/SEG1

P51/WKP1/SEG2

P52/WKP2/SEG3

P53/WKP3/SEG4

P54/WKP4/SEG5

P55/WKP5/SEG6

P56/WKP6/SEG7

P57/WKP7/SEG8

P60/SEG9

P61/SEG10

P62/SEG11

P63/SEG12

P64/SEG13

P65/SEG14

P66/SEG15

P67/SEG16

P70/SEG17

P71/SEG18

P72/SEG19

P73/SEG20

P74/SEG21

P75/SEG22

P76/SEG23

P77/SEG24

P80/SEG25

P81/SEG26

P82/SEG27

P83/SEG28

P84/SEG29

P85/SEG30

P86/SEG31

P87/SEG32

P90/SEG33

P91/SEG34

P92/SEG35

P93/SEG36

P94/SEG37

P95/SEG38

P96/SEG39

P97/SEG40

IC1 HD6433875A63H

SEG20

SEG19

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

HANG

CTDA2

CTDA1

CTDA0

SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32

R47 EXB-V8V (1kX4)

R53 1k R52 1k R51 1k

C11

0.001

C10

0.01

VSS

VDD

OUT

321

IC2 S-80742SL-A6

100k

10k

C14

0.47

MA111

220k

R4 100k

Q1 2SC4081

C15

0.001

C16

0.001

12k

MA77

C17

0.001

C18 47p

C19

X1 CR-590L347µ

C20

20p

R7 1M

R8 10

R43 12k

R44 EXB-V8V (1kx4)

R45 EXB-V8V (1kx4)

CS SO WP VSS

VCC

HOLD

SCK

IC3 25LC160T-I/SN

C21

0.01

1 2 3 45

R61 100k

SCKSISO

CLIN

CLOUT

POSW

R64 1k

R63 1k

R62 1k

R55 100k

KR0 KR1 KR2 KR3 KS0 KS1

DIM

R67

100k

R66

100k

R65

100k

R54 1k

R48 EXB-V8V (1kx4)

R46 EXB-V8V (1kx4)

MTONE DTMF

OPV3 OPV2 OPV1 CTCIN SD LVIN TEMP VIN

KR0 KR1 KR2 KR3

R17 EXB-V8V (1kx4)

KS0

KS1

R19 470

R18 470

R59 1k

C28

0.001

C22

47p

C23

47p

C24

47p

C25

47p

C26

47p

C27

47p

DIM

D6 MA8051

Q3 DTA143ZU

R11

820

R16

2.2k

R15

2.2k

R14

390

R12

390

DS10DS11

DS2DS3DS4

DS6DS7DS5

DS8DS9

8V CLONE AFO PTT MICE MIC GND HANGER

R57

15k

CLOUT

CLIN

R69 100k

Q4 DTC144TU

D2 DA204U

D3 DA204U

D4 DA204U

R58 47k

CLON AFO

PTTIN

MIC

HANG

R20 1k

L1 1µ

R21 1k

R22 10

C35

0.001

C34

47p

C32

0.001

C33

0.001

C29

0.001

C30

470p

CTCIN

to MIC

C36

0.01

R25

56k

R28

Q5 XP4601

R27 39k

C37 10

R24

180k

R26

3.9k

R29

C38

0.022

R30 10k

C39

0.1

R31 10k

DET

CTDA0

CTDA1

CTDA2

R35 10k

R34 27k

R33 68k

R32

22k

R36 12k

C42

0.1

R37 12k

C40

0.047

C41

0.033

C43

0.01

R38

47k

Q6 2SC4081

C44

0.01

R56

5.6k

R39 100k

R40 100k

R42

330k

R41

270k

DTCSIN

C45

0.01

TONE

Q7 2SC4081

C82

0.1

R50 100k

R68

47k

R60 RV-150 (10KB)

Q10 DTC144TU

C62 47p

C61 47p

C60 47p

C59 47p

C58 47p

C57 47p

C56 47p

C52 47p

R70 47k

C50 47p

C49 47p

C48 47p

C47 47p

C46 47p

C69

0.001

C67

0.001

C13

0.001

C12

0.01

C63 47p

C64 47p

C65 47p

C66 47p

C70 47p

C71 47p

C73 47p

C74 47p

C77 47p

C78 47p

C79 47p

C80 47p

OPINT OPCS BUSY BEEPOUT TONE BEEP DICSIN RFATT NOIS UNLK EXEN EXST DAST PLST VIN TEMP MIC

CPU5V

AFO

SI OPT3 OPT2 OPT1 OPV3 OPV2 OPV1

PTT

PTTIN

DET

PWON

EXPTT

DIMIN

SCK

LVIN

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8

SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25

DS1 LD-HU10140J

SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32

COM0 COM1 COM2

SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8

SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32

COM1

COM2

COM3

FRONT UNIT

POSW

DS2 ~ DS11 SML-311YTx10

to MAIN UNIT J1

CONNECT WITH W3

EXEN EXST DAST

PLST

DIMIN EXPTT PWON

UNLK

COM1

COM2

COM3 RFATT

PTT OPT1 OPT2 OPT3

OPCS BUSY

OPINT

NOIS

R49

100

CSHIFT

BEEPOUT

BEEP

DTMF

MTONE

AFO

MIC

HANG

PTTIN

HANG

PWR

S2 S3 S4∆S5

∆

S9P3S8P2S7

VHF/UHF FRONT UNIT SCHEMATIC

8-12

November 1998 Part No. 001-7600-001

2SB1132 R

(Symbol: BARB)

2SB1143 S 2SC4081 R

(Symbol: BR)

2SC4215 O

(Symbol: QO)

2SC4703 SE

(Symbol: SE)

• TRANSISTORS AND FET'S

2SC5107 O

(Symbol: MF)

2SC5110 O

(Symbol: MGO)

2SD1664 Q

(Symbol: DA)

2SJ144 GR

(Symbol: VG)

2SJ377

(Symbol: 4L)

2SK241 R (TX)

2SK272

(Symbol: K)

2SK536

(Symbol: BJ)

2SK880 GR

(Symbol: XG)

DTA143ZU

(Symbol: 113)

DTA144EU

(Symbol: 16)

DTC114EU

(Symbol: 24)

DTC144EU

(Symbol: 26)

DTC144TU

(Symbol: 06)

DTC363EK

(Symbol: H27)

XP4601

(Symbol: 5C)

XP6501

(Symbol: 5N)

1SS302

(Symbol: C3)

• DIODES

1SS352

(Symbol: C1)

1T365

(Symbol: pink line)N)

DA221

(Symbol: K)

DAN202U

(Symbol: N)

DAN204U

(Symbol: K)

MA713

(Symbol: MIN)

HVU350

(Symbol: 4)

MA77

(Symbol: 4B)

MA111

(Symbol: 1B)

MA8051 M (TX)

(Symbol: 5-1)

UHF (7640) Transi stor Basing Diagrams UHF (7640) Diode Basing Diagrams

E.F. Johnson Company 761X, 764X Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual