Kenwood TK-2160 User Manual

VHF FM TRANSCEIVER

TK-2160

SERVICE MANUAL

Antenna (KRA-26: Option)

Knob (CH-SELECTOR) (K29-9280-13)

Knob (VOLUME) (K29-9278-13)

Cabinet assy (A02-3826-33)

B51-8652-00 (S) 1214

CONTENTS

GENERAL .............................................................2

SYSTEM SET-UP .................................................2

OPERATING FEATURES ..................................... 3

REALIGNMENT....................................................4

DISASSEMBLY FOR REPAIR .............................. 5

CIRCUIT DESCRIPTION ....................................... 7

INSTALLATION..................................................11

TERMINAL FUNCTION......................................12

SEMICONDUCTOR DATA ................................. 13

COMPONENTS DESCRIPTION .........................14

PARTS LIST........................................................15

EXPLODED VIEW...............................................23

PACKING ............................................................ 24

ADJUSTMENT ................................................... 25

PC BOARD

TX-RX UNIT (X57-672X-XX) ........................30

SCHEMATIC DIAGRAM.....................................34

BLOCK DIAGRAM..............................................38

LEVEL DIAGRAM...............................................40

KSC-30................................................................41

SPECIFICATIONS............................BACK COVER

Knob (PTT) (K29-9279-03)

Does not come with antenna. Antenna is available as an option.

TK-2160

GENERAL / SYSTEM SET-UP

INTRODUCTION

SCOPE OF THIS MANUAL

This manual is intended for use by experienced technicians familiar with similar types of commercial grade communications equipment. It contains all required service information for the equipment and is current as of the publication date. Changes which may occur after publication are covered by either Service Bulletins or Manual Revisions. These are issued as required.

ORDERING REPLACEMENT PARTS

When ordering replacement parts or equipment information, the full part identification number should be included. This applies to all parts, components, kits, or chassis. If the part number is not known, include the chassis or kit number of which it is a part, and a sufficient description of the required component for proper identification.

Unit Model & destination

TK-2160

TX-RX Unit Frequency range Remarks

K,M X57-6720-10 136~174MHz

IF1 : 49.95MHz LOC : 50.4MHz

PERSONAL SAFETY

The following precautions are recommended for personal

safety:

●

DO NOT transmit until all RF connectors are verified secure and any open connectors are properly terminated.

●

SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere.

●

This equipment should be serviced by a qualified technician only.

SERVICE

This radio is designed for easy servicing. Refer to the schematic diagrams, printed circuit board views, and alignment procedures contained within.

SYSTEM SET-UP

Merchandise received

License and frequency allocated by FCC

Choose the type of transceiver

Transceiver programming

Are you using the optional antenna?

Are you using the speaker microphone?

Delivery

Frequency range (MHz) RF power Type

TX/RX 136~174

A personal computer (IBM PC or compatible), programming interface (KPG-22), and programming software (KPG-82D) are required for programming. (The frequency, TX power HI/LOW, and signalling data are programmed for the transceiver.)

YES

KRA-22 or KRA-26

Optional antenna

KMC-17 or KMC-21

Speaker microphone

(Option)

5.0W

TK-2160 (K,M)

OPERATING FEATURES

1 2 3

6 7

TK-2160

1. Operation Features

Installing the (Optional) Antenna

Screw the antenna into the connector on the top of the transceiver by holding the antenna at its base and turning it clockwise until secure.

Installing the Belt Clip

Note: When first installing the belt clip, you must remove the

battery pack from the rear of the transceiver.

1 Remove the two screws from the

rear of the transceiver, then remove the small, plastic black covering that was held in place.

2 Insert the belt clip mount into the

space on the rear of the transceiver.

3 Using the 2 screws, affix the belt

clip in place.

Note: Do not dispose of the plastic

black covering! If you remove the belt clip, replace the covering into the space on the rear of the transceiver. Either this covering or the belt clip must be in place, otherwise the battery pack may not remain installed properly.

Installing the Cover over the

Speaker/ Microphone Jacks

Note: When installing the speaker/

microphone jack cover, you must remove the battery pack from the rear of the transceiver.

If you are not using a speaker/ microphone, install the cover over the speaker/ microphone jacks using the supplied screw.

Note: To lift the cover after it has been installed, use a piece

of hardened plastic or metal, such as a small screwdriver. Lift the cover by its tab, beside the screwhole, taking care not to damage the cover.

Installing the (Optional) Speaker/ Microphone

Note: When installing the optional

1 Insert the speaker/ microphone

2 Attach the locking bracket using the supplied screw. Note: To lift the locking bracket after it has been installed,

speaker/ microphone and its locking bracket, you must remove the battery pack from the rear of the transceiver.

plugs into the speaker/ microphone jacks.

use a piece of hardened plastic or metal, such as a small screwdriver. Lift the bracket by its tab, beside the screwhole, taking care not to damage the bracket.

GETTING ACQUAINTED

Antenna

Microphone Speaker

The transceiver is shown with the optional KNB-24L battery pack.

q LED indicator

Lights red while transmitting. Lights green while receiving. Flashes orange while receiving a 2-Tone, DTMF, or FleetSync signal that matches the one set up in your transceiver. If programmed by your dealer, flashes red when the battery power is low while transmitting.

w Channel Switch

Rotate to select a channel from 1 to 16.

e Power switch/ Volume control

Turn clockwise to switch ON the transceiver. Rotate to adjust the volume. To switch OFF the transceiver, turn counterclockwise fully.

r AUX key

This is a PF (Programmable Function) key. Press it to activate its auxiliary function (page 4). The default setting for this key is None.

t PTT (Push-to-Talk) switch

Press this switch, then speak into the microphone to call a station.

y Side 1 key

This is a PF (Programmable Function) key. Press it to activate its auxiliary function (page 4). The default setting for this key is None.

u Side 2 key

This is a PF (Programmable Function) key. Press it to activate its auxiliary function (page 4). The default setting for this key is Squelch Off Momentary. Press each key to activate its auxiliary function.

i SP/MIC jacks

Connect an optional speaker/ microphone here.

TK-2160

OPERATING FEATURES /

Programmable Auxiliary Functions

The AUX, Side 1, and Side 2 keys can be programmed

with the auxiliary functions listed below:

• 2-Tone Encode

• Emergency

•Monitor Momentary

• Monitor Toggle

• None

• RF Power Low

•Scan

• Scan Temporary Delete

• Scrambler

• Squelch Off Momentary

• Squelch Off Toggle

∗1

This function can be programmed only on the AUX key.

REALIGNMENT

1. Modes

User mode

User mode For normal use. PC mode Used for communication between the

Data programming Used to read and write frequency data mode PC test mode Used to check the radio using the PC.

2. How to Enter Each Mode

User mode Power ON PC mode Received commands from PC

3.PC Mode

3-1. Preface

The TK-2160 transceiver is programmed using a personal computer, a programming interface (KPG-22) and programming software (KPG-82D).

The programming software can be used with an IBM PC or compatible. Figure 1 shows the setup of an IBM PC for programming.

∗1

PC mode

Mode Function

Mode Operation

Data programming mode

PC test mode

radio and PC (IBM compatible).

and other features to and from the radio.

This feature is included in the KPG82D.

PC tuning mode

REALIGNMENT

3-2. Connection procedure

1. Connect the TK-2160 to the personal computer with the interface cable.

2. When the POWER is switched on, user mode can be entered immediately. When the PC sends a command, the radio enters PC mode. When data is transmitting from the transceiver, the red LED lights. When data is received by the transceiver, the green LED lights.

Notes:

• The data stored in the personal computer must match the model type when it is written into the EEPROM.

• Change the TK-2160 to PC mode, then attach the interface cable.

3-3. KPG-22 description

(PC programming interface cable: Option)

The KPG-22 is required to interface the TK-2160 with the computer. It has a circuit in its D-subconnector (25-pin) case that converts the RS-232C logic level to the TTL level.

The KPG-22 connects the SP/MIC connector of the TK-2160 to the computer’s RS-232C serial port.

3-4. Programming software description

KPG-82D is the programming software for TK-2160 supplied on a CD-ROM. This software runs under Windows 98, ME, Windows 2000 or XP on an IBM-PC or compatible machine.

The data can be input to or read from TK-2160 and edited on the screen. The programmed or edited data can be printed out. It is also possible to tune the transceiver.

IBM-PC

KPG-22

Gray + Gray/Black –

1.5D-XV Lead wire +

1.5D-XV Shield wire –

RF Power meter

or SSG

KPG-82D

Fig. 1

Tuning cable (E30-3216-05)

}

MIC

}

DISASSEMBLY FOR REPAIR

TK-2160

1. Separating the case assembly from the chassis.

1. Remove the volume knob z.

2. Remove the two screws

3. Lift the chassis Note: After separating the case assembly from the chassis,

remove the channel knob.

and remove it from the case assembly.

Channel knob

2. Separating the chassis from the TX/RX unit.

1. Remove the two screws v fixing the TX/RX unit B/2.

2. Remove the twelve screws the TX/RX unit A/2.

3. Remove the solder from the antenna terminal using a soldering iron

, then lift the unit off.

and two screws n fixing

3. How to remove the battery terminal block.

1. Remove the two screws /, then pull out the back cover Ω.

2. Remove the screw

≈.

≈

Ω

Packing

TX/RX UNIT A/2

TX/RX UNIT B/2

≈

Note: To remove the TX/RX unit B/2, remove the solder using

a soldering iron

Note: The two screws

battery terminal block

of TX/RX unit A/2 are fixing the

TK-2160

DISASSEMBLY FOR REPAIR

Assembling

•Installation of battery terminal block and packing

Install them so that no distortion or deformation occurs.

•Installation of speakers and cushion, and wire styling of speakers

•Installation of chassis and cabinet assy

Do not press this area, top packing easily deform.

First, mount the set to the cabinet assy.

Second, press down the Chassis to the cabinet assy as shown in the diagram.

Wire Styling

Install the speakers so that they do not protrude from the

cushion. Perform the wire styling of speakers as shown in a photograph.

Install the cushion according to the guide.

• Attaching the cushion

Attach the cushion as shown in Fig. 1.

G13-2017-04

G13-2020-04

Fig. 1

Note: Cushion must not cover the screws A,B and C.

Take screw B and MIC edge as reference line when sticking.

G13-2018-04 Stick between screw

A and B.

Good Condition NG Condition

After mount, packing should be in this condition.

Packing protruded out.

Note:

• Take care that the packing does not protrude from the chassis or case.

• Replace the protruded or deformed packing with a new one.

Packing deform.

CIRCUIT DESCRIPTION

Q401

H : Wide L : Narrow

C409

W/N

R408

R409

CD401

IFO

QUAD

IC401 FM IF SYSTEM

AFOUT

Q402

TK-2160

1. Frequency Configuration

The receiver utilizes double conversion. The first IF is 49.95 MHz and the second IF is 450 kHz. The first local oscillator signal is supplied from the PLL circuit.

The PLL circuit in the transmitter generates the necessary frequencies. Fig. 1 shows the frequencies.

TX/RX: 136 ~ 174MHz (K,M)

ANT

ANT SW

TX: 136 ~ 174MHz (K,M)

AMP

TX AMP

MCF

49.95MHz

RX: 185.95 ~ 233.95MHz (K,M)

AMP

IF SYSTEM

50.4MHz

X3 multiply

CF 450kHz

PLL

VCO

TCXO

AMP

MIC AMP

16.8MHz

Fig. 1 Frequency configuration

2. Receiver

The frequency configuration of the receiver is shown in Fig. 2.

ANT

ANT SW

IC401 IF,MIX,DET

CF401

BPF

TUNE

IC602 AF Amp

RF AMP Q404

IC601

AQUA

BPF

TUNE

MIXER Q403

1st Local

AF VOL

MCF

XF401

IC605

AF PA

IF AMP Q402

MIC

3) IF Amplifier Circuit

The first IF signal is passed through a four-pole monolithic crystal filter (XF401) to remove the adjacent channel signal. The filtered first IF signal is amplified by the first IF amplifier (Q402) and then applied to the lF system IC (IC401). The IF system IC provides a second mixer, second local oscillator, limiting amplifier, quadrature detector and RSSI (Received Signal Strength Indicator). The second mixer mixes the first IF signal with the 50.4MHz of the second local oscillator output (TCXO X1) and produces the second IF signal of 450kHz. The second IF signal is passed through the ceramic filter (CF401) to remove the adjacent channel signal. The filtered second IF signal is amplified by the limiting amplifier and demodulated by the quadrature detector with the ceramic discriminator (CD401). The demodulated signal is routed to the audio circuit.

4) Wide/Narrow Switching Circuit

Narrow and Wide settings can be made for each channel by switching the demodulation level. The WIDE (high level) and NARROW (low level) data is output from IC805, pin 54. When a WIDE (high level) data is received, Q401 turn off. When a NARROW (low level) data is received, Q401 turn on. Q401 turns on/off with the Wide/Narrow data and the IC401 detector output level is switched to maintain a constant output level during wide or narrow signals.

Q4 X3 multiply

2nd Local

TCXO

16.8MHz

Fig. 2 Receiver section

1) Front End (RF AMP)

The signal coming from the antenna passes through the

transmit/receive switching diode circuit, (D204,D206,D208

and D212) passes through a BPF (L411 and L412), and is

amplified by the RF amplifier (Q404).

The resulting signal passes through a BPF (L407 and L409)

and goes to the mixer. These BPFs are adjusted by variable

capacitors (D402,D403,D404 and D405). The input voltage

to the variable capacitor is regulated by voltage output from

the microprocessor (IC805).

2) First Mixer

The signal from the front end is mixed with the first local

oscillator signal generated in the PLL circuit by Q403 to

produce a first IF frequency of 49.95 MHz.

The resulting signal passes through the XF401 MCF to cut

the adjacent spurious and provide the opitimun

characteristics, such as adjacent frequency selectivity.

Fig. 3 Wide/Narrow switching circuit

5) Audio Amplifier Circuit

The demodulated signal from IC401 is amplified by IC602, and goes to AF amplifier through IC601. The signal then goes through an AF volume control (VR801), and is routed to an audio power amplifier (IC605) where it is amplified and output to the speaker.

TK-2160

RECEIVE SIGNALING

CIRCUIT DESCRIPTION

6) Tone Volume Fixed Circuit

This function generates a TONE signal sound even if the AF volume of the transceiver is the minimum. A TONE signal is sent through Q602 to the AF amplifier when, in the FPU, “TONE Volume Fixed” is set to ON.

IC805

CPU

BEEP

BEEPSW

IC601

AQUA

TONE VOL FIXED

[VOL Position vs Output Level]

500

Output Level (mV)

Min

VOL

Q602

SP-J

OFF

Center Max

IC605

TA7368F

Hi: ON LOW: OFF

Fig. 4 Tone volume fixed circuit

7) Squelch

Part of the AF signal from the IC enters the FM IC (IC401) again, and the noise component is amplified and rectified by a filter and an amplifier to produce a DC voltage corresponding to the noise level. The DC signal from the FM IC goes to the analog port of the microprocessor (IC805). IC805 determines whether to output sounds from the speaker by checking whether the input voltage is higher or lower than the preset value. To output sounds from the speaker, IC805 sends a high signal to the SP MUTE line and turns IC605 on through Q603,Q604,Q607 and Q608. (See Fig. 5)

8) Receive Signalling

(1) QT/DQT The output signal from IF IC(IC401) enters the microprocessor(IC805) through IC601. IC805 determines whether the QT or DQT matches the preset value, and controls the SP MUTE and the speaker output sounds according to the squelch results.

(2) 2-TONE Part of the received AF signal output from the AF amplifier IC602, and then passes through an audio processor (IC601), goes to the other AF amplifier IC603, is compared, and then goes to IC805. IC805 checks whether 2-TONE data is necessary. If it matches, IC805 carries out a specified operation, such as turning the speaker on. (See Fig. 5)

(3) MSK (Fleet Sync) Fleet Sync utilizes 1200bps and 2400bps MSK signal is output from pin 6 of IC601. And is routed to the VCO. When encoding MSK, the microphone input signal is muted.

RECEIVE SIGNALING

FM IF IC401

IF Amp

AN SQL

CPU

IC805

IC602 IF Amp

LSDI

HSDI

SP MUTE

SIGNAL

DTMF

QT/DQT

CLK,DATA, STD,LOADN

IC603

BPF & COMPALATER

2-TONE

IC601

AQUA

IC605

AF PA

Q603,604,607 SW

Fig. 5 AF amplifier and squelch

(4) DTMF The DTMF input signal from the IF IC (IC401) is amplified by IC602 and goes to IC601. The decoded information is then processed by the CPU.

3. PLL Frequency Synthesizer

The PLL circuit generates the first local oscillator signal for

reception and the RF signal for transmission.

1) PLL

The frequency step of the PLL circuit is K:2.5,5,6.25 or

7.5kHz, M:6 or 6.25kHz. A 16.8MHz reference oscillator signal is divided at IC1 by a fixed counter to produce an oscillator (VCO) output signal which is buffer amplified by Q9 then divided in IC1 by a dual-module programmable counter. The divided signal is compared in phase with the 5 or 6.25kHz reference signal from the phase comparator in IC1. The output signal from the phase comparator is filtered through a low-pass filter and passed to the VCO to control the oscillator frequency. (See Fig. 6)

2) VCO

The operating frequency is generated by Q6 in transmit mode and Q5 in receive mode. The oscillator frequency is controlled by applying the VCO control voltage, obtained from the phase comparator, to the varactor diodes (D3,D5,D7 and D8 in transmit mode and D4,D6,D9 and D10 in receive mode). The RX pin is set high in receive mode causing Q8 and Q12 to turn Q6 off and Q5 on. The TX pin is set high in transmit mode. The outputs from Q5 and Q6 are amplified by Q9 and sent to the RF amplifiers.

Q608 SW

CIRCUIT DESCRIPTION

IC601

IC805

LPF

DTMF/2 TONE

LSDTCXO

LSDVCO

CPU

AGC

VCO

MIC

X1 TCXO

LPF

IC606

BUFFER

LPF

AQUA

TK-2160

TX VCO

RX VCO

5kHz/6.25kHz

PHASE

COMPARATOR

5kHz/6.25kHz

BUFF AMP

CHARGE

PLL DATA

16.8MHz

LPF

D3, 5, 7, 8

LPF

D4, 6, 9, 10

PLL IC IC1

REF OSC

Fig. 6 PLL circuit

3) Unlock Detector

If a pulse signal appears at the LD pin of IC1, an unlock

condition occurs, and the DC voltage obtained from C19,R6

and Q1 causes the voltage applied to the microprocessor

to go high. When the microprocessor detects this condition,

the transmitter is disabled, ignoring the push-to-talk switch

input signal. (See Fig. 7)

IC1

PLL IC

R16

C19

Fig. 7 Unlock detector circuit

4. Transmitter System

1) Microphone Amplifier

The signal from the microphone passes through the IC601.

When encoding DTMF, it is turned OFF for muting the

microphone input signal by IC601.

The signal passes through the Audio processor (IC601) for

the maximum deviation adjustment, and goes to the VCXO

modulation input.

Q8, 12

T/R SW

PUMP

IC805

CPU

DOUBLER

Q11

RF AMP

Fig. 8 Microphone amplifier

2) Drive and Final Amplifier

The signal from the T/R switch (D201 is on) is amplified by the drive amplifier (Q207) to 50mW. The output of the drive amplifier is amplified by the RF power amplifier (Q211) to 5.0W (1W when the power is low). The RF power amplifier consists of two MOS FET stages. The output of the RF power amplifier is then passed through the harmonic filter (LPF) and antenna switch (D204 and D206) and applied to the antenna terminal.

D204

From

T/R SW

(D201)

PCTV

(IC805)

Q206

Pre-DRIVE

AMP

R264 R265 R270

Q207 Q211

DRIVE

AMP

IC201

(1/2)

POWER AMP

VDD

IC201

(2/2)

D206

ANT

VGVG

Fig. 9 Drive and final amplifier and APC circuit

3) APC Circuit

The APC circuit always monitors the current flowing through the RF power amplifier (Q211) and keeps a constant current. The voltage drop at R264, R265 and R270 is caused by the current flowing through the RF power amplifier and this voltage is applied to the differential amplifier IC201(1/2). IC201(2/2) compares the output voltage of IC201(1/2) with the reference voltage from IC805. The output of IC201(2/2) controls the VG of the RF power amplifier, drive amplifier and pre-drive amplifier to make both voltages the same. The change of power high/low is carried out by the change of the reference voltage.

4) Encode Signalling

(1) QT/DQT QT,DQT data of the LSDTCXO Line is output from pin 22 of the CPU. The signal passes through a low-pass CR filter and goes to the TCXO(X1). The QT,DQT data of the LSDVCO Line is output from pin

LPF

TK-2160

IC805

CPU

IC804

EEPROM

20 of the CPU. The signal passes through a low pass CR filter, mixes with the audio signal, and goes to the VCO modulation input. TX deviation is adjusted by the CPU.

(2) DTMF/2 TONE High-speed data is output from pin 2 of the CPU. The signal passes through a low-pass CR filter, and provides a TX and SP out tone, and is then applied to the audio processor (IC601). The signal is mixed with the audio signal and goes to the VCO. TX deviation is adjusted by the CPU.

(3) MSK (Fleet Sync) The MSK input signal from the IF IC is amplified by IC602 (1/2) and goes to pin 31 of IC 601. The signal is demodulated by MSK demodulator in IC 601. The demodulated data goes to the CPU for processing.

CIRCUIT DESCRIPTION

Q810

Hi: OFF LOW: ON

Fig. 10 Frequency shift circuit

2) Memory Circuit

Memory circuit consists of the CPU (IC805) and an EEPROM (IC804). An EEPROM has a capacity of 64k bits that contains the transceiver control program for the CPU and data such as transceiver channels and operating features.

X801C834

XOUT

IC805

BSHIFT

5. Power Supply

There are 3.5V power supply for PLL circuit and five 5V power supplies for the microprocessor: 5M,5MS,5C,5R, and 5T. 5M is always output while the power is on. 5M is always output, but turns off when the power is turned off to prevent malfunction of the microprocessor.

5C is a common 5V and is output when SAVE is not set to OFF.

5R is 5V for reception and output during reception.

5T is 5V for transmission and output during transmission.

6. Control Circuit

The control circuit consists of a microprocessor (IC805) and its peripheral circuits. It controls the TX-RX unit. IC805 mainly performs the following:

(1) Switching between transmission and reception by the

PTT signal input.

(2) Reading system, group, frequency, and program data

from the memory circuit. (3) Sending frequency program data to the PLL. (4) Controlling squelch on/off by the DC voltage from the

squelch circuit. (5)Controlling the audio mute circuit by the decode data input. (6) Transmitting tone and encode data.

1) Frequency Shift Circuit

The microprocessor (IC805) operates at a clock of

7.3728MHz. This oscillator has a circuit that shifts the frequency by BEAT SHIFT SW (Q810). A beat sound may be able to be evaded from generation if “Beat Shift” is set to ON when it is generated in the internal spurious transmission modulated sound of a transceiver.

Fig. 11 Memory circuit

3) Low Battery Warning

The battery voltage is checked using by the microprocessor. The transceiver generates a warning tone when it falls below the warning voltage shown in the table.

(1)The red LED blinks when the battery voltage falls below

the voltage (1) shown in the table during transmission.

(2)The red LED blinks when the battery voltage falls below

the voltage (2) shown in the table during transmission.

Note:

The transceiver checks the battery voltage during reception even when, in the FPU, the Battery Warning status function is set to “On TX” (default setting). However, the LED does not blink during reception. During transmission, the LED blinks to generate the warning tone of a low battery voltage.

(3)The transceiver immediately stops transmission when

the battery voltage falls below the voltage (3) shown in the table. A message tone beeps while the PTT switch is released.

Battery Case Li-ion Battery Ni-Cd Battery Ni-MH Battery (1) 6.2[V] 6.5[V] 6.2[V] 6.2[V] (2) 7.6[V] 7.1[V] 6.8[V] 7.0[V] (3) 5.9[V] 6.2[V] 5.9[V] 5.9[V]

R833

R834

IC805

CPU

Fig. 12 Low battery warning

CIRCUIT DESCRIPTION / INSTALLATION

R608

C608

C619

TK-2160

4) Battery Type Detection

The transceiver automatically detects the battery type, measuring the resistance between the S-terminal and + terminal on the battery pack and changes the supplied voltage to the S-tarminal as below. The microprocessor then detects the battery type.

Resistor value Battery type Input voltage of S-terminal

1.8MΩ Li-ion 0.3~1.3V 560kΩ Ni-Cd 1.3~2.6V 220kΩ Ni-MH 2.6~5.0V OPEN Battery case 0~0.3V

7. Control System

Keys and channel selector circuit. The signal from the keys and channel selector are directly

input to the microprocessor, as shown in fig. 13.

Channel selector

EN1

EN2

EN3

EN4

IC805

CPU

Fig. 13 Control system

PTT

AUXSW

SIDE 1

SIDE 2

PTT

AUX SW

SW2

SW1

INSTALLATION

1. Optional Board

Remove the TX/RX unit from the radio before installing the

optional board in the radio.

The procedure for removing the TX/RX unit is described in the DISASSEMBLY FOR REPAIR section in the Service Manual.

Install the optional board on the back of the TX/RX unit.

For details on installation of the optional board, refer to Installation Information supplied with the optional board.

When installing the optional board, also refer to the chart in TERMINAL FUNCTION section (page 12) given in the Service Manual. Note: To install and use the Scrambler Board, remove “R601”

and “R647” from the front of the TX/RX unit.

R647 R601

R633

C607

R607

R609

C609

C645

C614

617

C618

606

R610

R640

R613

R615

R696

R628

R643

R642

C648

C646

R641

R629

R636

C637

R631

C641

R634

R647

CP808

R835

CP803

R840

R839

C642

R632

R601

C633

R626

R627

C631

C634

C632

C643

CP809

C627

R622

C628

C636

C625

R623

C640

IC601

R621

C621

C622

R624

C630

R625

C846

CP810

R618

R695

C635

1725

L804

C610 C613

R616

L806

C847

VCC

CP812

R855

CP813

R856

TX-RX UNIT (X57-6720-10) Component side view

TK-2160

TERMINAL FUNCTION

■ CN801

Designation

No.

1 GND GND Vss 2SB Switched B Output Voltage/7mA load DC (Battery terminal) ±0.5V 3A3 AUX3 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd 4 TXAFI Transmit AF input Input sensitivity/Impedance (1kHz std. dev.) 280±50mVrms @22kΩ Load 5A2 AUX2 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd 6A6 AUX6 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd 7A1 AUX1 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd 8A5 AUX5 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd

9A4 AUX4 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd 10 NC Non connection Non connection 11 5C DC 5V Output Voltage/10mA load 5.0±0.5V 12 DEO Discriminator signal output Output voltage/Impedance (1kHz std. mod.) 280±50mVrms @2.2kΩ Load 13 TXAFI Transmit AF input Input sensitivity/Impedance (1kHz std. dev.) 280±50mVrms @22kΩ Load 14 DEO Discriminator signal output Output voltage/Impedance (1kHz std. mod.) 280±50mVrms @2.2kΩ Load 15 NC Non connection Non connection

16 ALT Sidetone input 17 NC Non connection Non connection

18 NC Non connection Non connection 19 NC Non connection Non connection 20 GND GND Vss

Function Condition Value

Input sensitivity/Impedance (1kHz rated AF power/Vol. MAX)

7 ±3mVrms @22kΩ Load

■ Solder point connection

Designation

MIC_I Mic input Input sensitivity/Impedance (1kHz std. dev.) 7±3mVrms @22kΩ Load MIC_O Mic o utput RA_I Receiver AF input Input sensitivity/Impedance (1kHz rated AF power/Vol. MAX) 75±20mVrms @22kΩ Load RA_O Receiver AF output A1 AUX1 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd

A2 AUX2 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd A3 AUX3 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd A4 AUX4 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd A5 AUX5 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd A6 AUX6 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd SB Switched B Output Voltage/7mA load DC (Battery terminal) ±0.5V GND GND Vss 5C DC 5V Output Voltage/10mA load 5.0±0.5V TXAFI Transmit AF input Input sensitivity/Impedance (1kHz std. dev.) 280±50mVrms @22kΩ Load DEO Discriminator signal output Output voltage/Impedance (1kHz std. mod.) 280±50mVrms @2.2kΩ Load LSDFO Received sub-tone output Output voltage/Impedance (150Hz 15% mod.) 180±50mVrms @2.2kΩ Load ALT Sidetone input Input sensitivity/Impedance (1kHz rated AF power/Vol. MAX) 7±3mVrms @22kΩ Load

Function Condition Value

Output voltage/Impedance (1kHz 15mVrms mic input) 2.6±1.0mVrms @2.2kΩ Load Output voltage/Impedance (1kHz 100mVrms mic input) 90±20mVrms @100kΩ Load

Output voltage/Impedance (1kHz std. mod.) 150±50mVrms @2.2kΩ Load Output voltage/Impedance (1kHz system mod.) 290±50mVrms @100kΩ Load

SEMICONDUCTOR DATA

Microprocessor : M30622MCA7G7GP (TX-RX UNIT : IC805)

■ Pin function

Pin Port No. Name

1 PCTV O APC/BPF control data output. 2 DTMF O DTMF, 2TONE. 3 HSDI I High speed data input (2TONE). 4 EEPDAT I/O EEPROM data input/output. 5 EEPCLK O EEPROM Clock 6 BYTE I GND. 7 CNVSS I GND. 8 AUX5 O Option Board 5

9 AUX6 O Option Board 6 10 RESET I CPU reset. 11 XOUT O CPU clock. 12 VSS - GND. 13 XIN I CPU clock. 14 VCC - +5V. 15 NC I NC 16 INT I Battery voltage monitor input Low battery : L 17 RDF/FD I Base Band IC Data input

TCLK/

DTRDI 19 NC - NC 20 LSDVCO O Low speed data output (VCO). 21 NC I NC 22

LSDTCXO 23 NC I NC 24 BEEP O Beep output. 25 OPTDET I Option detect input 26 NC - NC 27 NC - NC 28 NC - NC 29 AUX4 O Option board port 4 30 AUX2 I/O Option board port 2 31 NC - NC 32 NC - NC 33 TXD I/O Serial data. 34 PTT/RXD I PTT on : L/Serial data. 35 STD I Base Band IC Data input 36 BBDIR O Base Band IC Data output 37 BBCLK O Base Band IC clock output 38 BBDI/O I/O Base Band IC Data input/output 39 NC - NC

TDATA/ 40

DTRCLK 41

DTRLOADN 42 AUX3 O Option board port 3 43 AUX1 O Option board port 1 44 NC - NC 45 NC - NC 46 DSW O APC voltage discharge Switch 47

BEEPSW 48 AFCOUT O AF amp power supply control 49 AFMUTE O RX audio mute 50 NC - NC 51 TX O TX VCO power supply switch TX:L 52 RX O RX VCO power supply switch RX:L

I/O Function

I Base Band IC Data input

O Low speed data output (TCXO).

O Base Band IC Data output O Base Band IC Data output

O Beep switch.

Pin Port No. Name

53 BSHIFT O Beet shift switch. 54 W/N O W/N switch Wide:H 55 NC - NC 56 APCSW O APC switch output. 57 SAVE O Battery save output. 58 5TC O 5T control output. 59 5RC O 5R control output. 60 VCC - +5V. 61 5MSC O 5M control output. 62 VSS - GND. 63 NC - NC 64 NC - NC 65 NC - NC 66 NC - NC 67 EN4 I CH selector input 4. 68 EN3 I CH selector input 3. 69 EN2 I CH selector input 2. 70 EN1 I CH selector input 1. 71 NC - NC 72 LEDTX O RED LED lights control output 73 LEDRX O GREEN LED lights control output 74 AUXSW I Key input (Emergency). 75 SIDE1 I Side key 1 input. 76 SIDE2 I Side key 2 input. 77 NC - NC 78 NC - NC 79 SIM1 I Destination select 1. 80 SIM2 I Destination select 2. 81 NC - NC 82 PLLUL I PLL unlock detect input. unlock : L 83 RFCLK O PLL clock output. Latch : L 84 RFDAT O PLL data output. 85 PS O PLL power save output. 86 PLLSTB O PLL strobe output. 87

BATTSEL 88 BATT I Battery voltage input. 89 VOX I VOX input. 90 RSSQL I Received signal strength indicator input. 91 ANSQL I Squelch level input. 92 LSDI I Low speed data input (QT/DQT). 93 THM I Thermistor input. 94 AVSS - GND. 95 NC - NC 96 VREF - +5V. 97 AVCC - +5V. 98 NC - NC 99 NC - NC

100 NC - NC

TK-2160

I/O Function

I Battery distinction input.

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