Kenwood TK-6110 Service Manual

VHF FM TRANSCEIVER

TK -6 11 0

SERVICE MANUAL

Microphone (T91-0621-05)

Cabinet (A01-2170-03)

Knob (VOL) (K29-5389-03)

CONTENTS

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

SYSTEM SET-UP ..................................................... 3

OPERATING FEATURES ......................................... 4

REALIGNMENT........................................................ 8

INSTALLATION...................................................... 10

CIRCUIT DESCRIPTION......................................... 13

SEMICONDUCTOR DATA..................................... 18

DESCRIPTION OF COMPONENTS ....................... 20

PARTS LIST ............................................................ 22

EXPLODED VIEW .................................................. 31

Key top (K29-5388-02)

PACKING ................................................................ 32

ADJUSTMENT ....................................................... 33

TERMINAL FUNCTION ......................................... 40

PC BOARD VIEWS

TX-RX UNIT (X57-6100-XX) (A/3, C/3) ........... 41

TX-RX UNIT (X57-6100-XX) (B/3).................... 47

SCHEMATIC DIAGRAM ........................................ 51

BLOCK DIAGRAM................................................... 57

SPECIFICATIONS................................................... 59

Panel assy (A62-0761-13)

TK-6110

GENERAL

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 data. 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.

PERSONNEL SAFETY

The following precautions are recommended for personnel safety :

• DO NOT transmit if someone is within two feet (0.6

meter) of the antenna.

• DO NOT transmit until all RF connectors are verified se-

cure and any open connectors are properly terminated.

• SHUT OFF and DO NOT operate this equipment near

electrical blasting caps or in an explosive atmosphere.

• All equipment should be properly grounded before

power-up for safe operation.

• This equipment should be serviced by a qualified techni-

cian only.

3. PRE-INSTALLATION CHECKOUT 3-1. Introduction

Each radio is adjusted and tested before shipment. However, it is recommended that receiver and transmitter operation be checked for proper operation before installation.

3-2. Testing

The radio should be tested complete with all cabling and accessories as they will be connected in the final installation. Transmitter frequency, deviation, and power output should be checked, as should receiver sensitivity, squelch operation, and audio output. Signalling equipment operation should be verified.

4. PLANNING THE INSTALLATION 4-1. General

Inspect the vehicle and determine how and where the radio antenna and accessories will be mounted.

Plan cable runs for protection against pinching or crushing wiring, and radio installation to prevent overheating.

4-2. Antenna

The favored location for an antenna is in the center of a large, flat conductive area, usually at the roof center. The trunk lid is preferred, bond the trunk lid and vehicle chassis using ground straps to ensure the lid is at chassis ground.

4-3. Radio

The universal mount bracket allows the radio to be mounted in a variety of ways. Be sure the mounting surface is adequate to support the radio’s weight. Allow sufficient space around the radio for air cooling. Position the radio close enough to the vehicle operator to permit easy access to the controls when driving.

PRE-INSTALLATION CONSIDERATIONS

1. UNPACKING

Unpack the radio from its shipping container and check for accessory items. If any item is missing, please contact KENWOOD immediately.

2. LICENSING REQUIREMENTS

Federal regulations require a station license for each radio installation (mobile or base) be obtained by the equipment owner. The licensee is responsible for ensuring transmitter power, frequency, and deviation are within the limits permitted by the station license.

Transmitter adjustments may be performed only by a licensed technician holding an FCC first, second or general class commercial radiotelephone operator’s license. There is no license required to install or operate the radio.

4-4. DC Power and wiring

1. This radio may be installed in negative ground electrical systems only. Reverse polarity will cause the cable fuse to blow. Check the vehicle ground polarity before installation to prevent wasted time and effort.

2. Connect the positive power lead directly to the vehicle battery positive terminal. Connecting the Positive lead to any other positive voltage source in the vehicle is not recommended.

3. The cable provided with the radio is sufficient to handle the maximum radio current demand. If the cable must be extended, be sure the additional wire is sufficient for the current to be carried and length of the added lead.

GENERAL / SYSTEM SET-UP

TK-6110

5. INSTALLATION PLANNING – CONTROL STATIONS 5-1. Antenna system

Control station. The antenna system selection depends on many factors and is beyond the scope of this manual. Your KENWOOD dealer can help you select an antenna system that will best serve your particular needs.

5-2. Radio location

Select a convenient location for your control station radio which is as close as practical to the antenna cable entry point. Secondly, use your system’s power supply (which supplies the voltage and current required for your system). Make sure sufficient air can flow around the radio and power supply to allow adequate cooling.

SYSTEM SET-UP

SERVICE

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

Merchandise received

License and frequency allocated by FCC

Choose the type of transceiver

Transceiver programming

Are you using the external speaker?

Are you using the ignition sense cable?

Delivery

Frequency range

29.7~37MHz 35~50MHz

See page 8 A personal computer (IBM PC or compatible), programming interface (KPG-46), and programming software (KPG-59D) are required for programming. (The frequency and signalling data are programmed for the transceiver.)

YES

KES-4 (EXT. SP)

RF power

70W 70W

KCT-18

Type TK-6110 K TK-6110 K2

See page 12

TK-6110

Antenna

connector

Power input

connector

15 pin connector

(for accessories)

PTT (Push To Talk) switch

Press and hold to transmit, then speak into the microphone. Release to receive.

OPERATING FEATURES

1. Controls and Functions

1-1. Front Panel

3 4 5 6 7 8 9

Volume control

Turn clockwise to increase the volume. Turn counter-

clockwise to decrease the volume.

/ keys

Press these keys to activate their programmable functions. The default settings of these keys are “Channel Up” (

) and “Channel Down” ( ).

Microphone jack

Insert the microphone plug into this jack.

Display

MON A B C SCN

Speaker

Displays the operating Channel number,

the Channel name, and the transceiver

status.

Displays the operating channel number

and the channel status:

P indicates a Priority channel

HC indicates a Home Channel

tA indicates Talk Around mode

Flashes when a call is received by DTMF

or 2-Tone signaling. Appears during and

after transmitting if set by the dealer.

Appears when signaling squelch is

turned OFF.

Appears while scanning is in progress.

Appears when the optional scrambler

board is enabled.

Appears when the selected channel is in

the scanning sequence.

Appears when Aux is ON.

Appears when Operator Selectable Tone

is enabled.

1-3. Rear Panel

IO (Power) switch

Press to switch the power ON. Press and hold for approximately 1 second to switch the power OFF.

MON key

Press MON to activate its programmable function. The default setting of this key is “Monitor”.

A key

6 7

B▼ key

C▲ key

SCN key

Press SCN to activate its programmable function. The default setting of this key is “Scan”.

LED

Lights red while transmitting. Lights green while the selected channel is busy. Blinks orange when you receive a call by 2-Tone or DTMF.

Press these PF (programmable function)



keys to activate their programmable func-



tions. The default setting of these keys is



“No Function”.

1-2. Display

1-4. Microphone

OPERATING FEATURES

TK-6110

2. Scanning

2-1. Start Scanning

You can start scanning when 1 priority channel and at least 1 ADD channel, or 2 or more ADD channels are selected. The transceiver must be in the normal receiving mode (releasing PTT).

Press the key programmed to the scan, the scan starts. The “SCN” (scan) icon appears on the main display and “SCAN” or revert channel appears on the 8-digit alphanumeric display.

2-2. Stop Scanning

The scan stops temporarily if the following conditions are satisfied.

1) A carrier is detected, then signalling matches on channel

for which receive the signalling is set by the program-

ming software.

2) A carrier is detected on the channel for which receiving

signalling is not set by the programming software or

when the monitor (signalling cancel) function is activated.

2-3. Types of Scan Channel

1) Priority channel is the most important channel for the

scan, and always detects a signal during scan and when

the scan stops temporarily.

2) Non-priority channels detects a signal during scan and

when scan stops temporarily.

2-4. Setting Priority Channel

Priority channel can be set as follows with the programming software (KPG-59D).

1) Specify priority channel as fixed priority channel.

2) Make selected channels, priority channels.

2-5. Scan Type Depending on the Priority Channel

1) When no priority channels are set : Only the non-priority

channels are scanned.

If the transceiver stops on a non-priority channel, priority

channel is still checked for signals at the specified time

intervals.

If the transceiver detects a signal on a priority channel, it

pauses at the priority channel and starts receiving the

calls.

2) When priority channel is set : Either priority channel is

scanned.

If a priority channel stops temporarily, it stops until there

is no signal on the priority channel.

2-6. Revert Channel

The revert channel is used to transmit during scanning and set by the programming software (KPG-59D).

1) Last called channel

The transceiver reverts to the last called channel during

the scan.

2) Last used channel

The transceiver reverts to the last used (transmitted)

channel during scan. “Last used” revert channel in-

cludes talkback function.

3) Selected with talkback The transceiver reverts to the channel before scanning or the channel that you changed during scan.

4) Selected channel The transceiver reverts to the channel before scanning or the channel that you changed during scan. While the transceiver pauses scanning, the revert channel becomes the channel you selected with [CH UP], [CH DW], [CH1] to [CH5] in the last step.

5) Priority with talkback The transceiver reverts to the priority channel. If you press PTT during a resume timer (dropout delay time, TX dwell time) or calling, you can transmit on current channel to answer to the call however revert channel is set to priority channel. After resume time, scan re-starts and transmission channel is return to priority channel.

6) Priority The transceiver reverts to the priority channel.

2-7. Scan End

When you press the key once again, programmed to the

scan function during scan mode, the scan ends.

The scan icon “SCN” and “SCAN” or revert channel (pro-

grammable) display goes off.

2-8. Temporarily Delete/Add

It is possible to delete or add channel temporarily during

scan. When scan stops on unnecessary channel for example by interference of the other party, activate the delete/ add function (for example press the key), then that channel is deleted temporarily and scan re-start immediately.

When you would like to add the deleted channel tempo-

rarily to scan sequence, select the desired (deleted) channel during scan, activate the delete/add function (for example press the key) before scan re-start.

That channel is added temporarily to scan sequence. The

temporary deleted or added channels are returns to pre-set delete/add, when the transceiver exits from scan mode.

3. Optional Features

You can use these features using the programming soft-

ware (KPG-59D).

3-1. Beep Tones

The beep tones (power on tone, control tone, warning

tone, alert tone) are individually programmable to the fixed level 0 to 31 or follow the mechanical volume position.

3-2. Minimum Volume

The minimum volume is programmable (0 to 31). The

transceiver remains the minimum volume level however the mechanical volume position is set to zero.

3-3. BCL (Busy Channel Lockout) Override

You can transmit in spite of Busy Channel Lockout situa-

tion. For example : To make an emergency voice call.

To transmit under busy channel lockout situation, press

PTT once more within approx. 500ms after the PTT release.

TK-6110

ABCDEFGH I

JKLMNOPQR

STUVWXYZ

123456789

All on

OPERATING FEATURES

3-4. Sub LCD Display

You can use 3-digit 7-segment the display to display the channel number. It is useful when the main (8-digit 13-segment) display indicates channel name.

3-5. Emergency Channel Display

The transceiver can be programmed to display “EMERGENCY” channel name when it is in emergency mode.

If you set to “off” by KPG-59D the transceiver shows selected group/channel/status before entering to the emergency mode however the transceiver is in an emergency mode.

3-6. Clear to Transpond

The transceiver waits the transpond of 2-Tone/DTMF if channel is busy until channel open. This feature replies to the transpond signal when the caller returns to receive.

3-7. Mode (Enable/Disable)

The transceiver has many special modes mainly for maintenance.

· Panel Test mode

· Clone mode

· Main programming mode

It is possible to set enable/disable for each mode. We recommend to set these mode to Disable after set up to save contents.

3-8. ID

The transceiver is capable to have ID. The format is DTMF. The timing that the transceiver sends ID is programmable.

Begin of TX : Connect ID is send on beginning of trans-

mission.

End of TX : Disconnect ID is send on end of transmission.

Both : Connect ID is send on beginning of transmission

and disconnect ID is send on end of transmission.

Off : Sending ID function is disabled.

There is also “PTT ID” setting for each channel. Refer “PTT ID” of channel feature.

3-9. OST (Operator Selectable Tone)

The transceiver is capable to have “OST” function and 16 tone pair (QT/DQT) with max 8-digit name for each tone pair.

3-11. “TOT” Pre-Alert

The transceiver has “TOT” pre-alert timer. This parameter selects the time at which the transceiver generates “TOT” pre-alert tone before “TOT” is expired.

“TOT” will be expired when the selected time passes from a TOT pre-alert tone.

3-12. “TOT” Re-Key Time

The transceiver has “TOT” re-key timer. This timer is the time you can not transmit after “TOT” exceeded. After “TOT” re-key time expired you can transmit again.

3-13. “TOT” Reset Time

The transceiver has “TOT” reset timer. This timer is the minimum wait time allowed during a transmission that will reset the “TOT” count.

“TOT” reset time causes the “TOT” to continue even after PTT is released unless the “TOT” reset timer has expired.

3-14. Signalling

Signalling “AND/OR” sets the audio unmute condition for any channel programmed with the option signalling (2Tone/ DTMF).

AND : “AND” requires both the valid option signalling

and the programmed QT/DQT to be received for audio to

unmute (and initiate an option signalling decode alert).

OR : “OR” requires either the valid option signalling or

the programmed QT/DQT to be received for audio to

unmute (an option signalling decode alert is only initiated

if the proper option signalling is decoded).

4. Channel Features

You can use these features using the programming software (KPG-59D).

4-1. Alphanumeric Display (Channel Name)

The programming software (KPG-59D) enables you to set the alphanumeric display for channel name. The total text size of channel name are 8-digits.

The characters can be used as shown in Figure 1.

•“OST” Back Up

The transceiver is programmable the selected “OST” code is memorized or not. If you set to Disable (no memorized), the “OST” function always starts at “off”.

3-10. “TOT” (Time-Out Timer)

The transceiver has the “TOT”. This parameter selects the period of time users can continuously transmit.

When the selected period passes, the transceiver generates an warning tone and stops the transmission.

Fig. 1

OPERATING FEATURES

TK-6110

4-2. Option Signalling

The transceiver is programmable to the option signalling (2-Tone decode program 1, 2-Tone decode program 2, 2Tone decode program 3, DTMF decode) to each channel. It is useful to receive an individual call.

Receive format is selectable “AND” or “OR” with QT/ DQT. The radio response of option signalling is programmable call Alert and “Transpond” for each option signalling (2-Tone decode program 1, 2-Tone decode program 2, 2Tone decode program 3, DTMF).

4-3. PTT ID

PTT ID provides a DTMF ANI to be sent with every time PTT (connect ID at beginning of transmission, disconnect ID at end of transmission, or both).

You can program PTT ID “on” or “off” for each channel. The contents of ID are programmed for each transceiver.

4-4. Busy Channel Lockout

Transmission is inhibited when the channel is busy. It is able to set this feature “Yes” or “No” for each channel.

4-5. Scan Delete/Add

Scanning “delete/add” is programmable for each channel. Set the currently selected channel required to include in the scan sequence to “add”.

The operator can change the “delete/add” information using the key programmed to “delete/add” function.

5. Key Functions

5-1. No Function

Sounds error operation beep, and no action will occur. Use this function when the transceiver is required to be more simple operated.

5-2. AUX.

The AUX function can be programmed for push key.

If this key is pressed, the “A” icon lights on the LCD and the AUX port which is contained in 15-pin connector located at the rear of the transceiver goes to low level.

If pressed again, the “A” icon goes off and the AUX port goes to Open-collector.

5-3. Channel Down

If this key is pressed once, the channel number decreases by one step. If this key is hold down, the channel number decreases continuously.

5-4. Channel Up

If this key is pressed once, the channel number increases by one step. If this key is hold down, channel number increases continuously.

5-6. Delete/Add

This key switches the currently displayed channel be-

tween “Delete” and “Add”.

The “Add” channel contained in the scan sequence, and “Delete” channel is not contained. In the scan mode, this key switches the channel delete or add temporarily.

5-7. Home Channel

Press this key once, the channel switches to the pre-programmed home channel. Press this key again, the channel goes back to the previous channel.

5-8. Monitor

Monitor the channel before a transmission. Press this key once, “MON” appears and unmutes speaker if a carrier is present, regardless of the specified signalling (including option signalling). Press this key again, “MON” disappears and mutes speaker.

Press this key after the Option Signalling is matched, the Option Signaling is reset. DBD (Dead Beat Disable) mode is not reset by this operation.

Press and hold the Monitor key for 2 seconds to disable the squelch.

5-9. Operator Selectable Tone

When this key is pressed, the “OST” icon lights and Encode/Decode QT/DQT is switched to the OST Tone pair. If pressed again, the “OST” icon goes off and Encode/Decode QT/DQT returns to KPG-59D pre-set.

When this key is held down for 1 second, the transceiver enters “OST Select Mode”. In this mode, the display shows OST No. or OST Name which is set to the channel and operator can select one of OST Tone pair using UP key and DW key.

If pressed this key again, the displayed OST code is memorized to the channel, the transceiver exits from the OST Select Mode, returns to normal channel display and “OST” icon lights.

16 kinds of tone pair for OST can be programmed by KPG-59D. OST is useful to access the repeater with same radio frequency and different tone (QT/DQT).

5-10. Scan

Press this key starts scanning. Pressing this key stops scanning.

5-11. Squelch Level

The preset squelch level is varied in user mode (0 to 15). Press the key programmed to “squelch level”, the transceiver enters to “squelch level adjust mode”.

The squelch level can be adjusted by key programmed to “squelch level” again, the adjusted level is memorized and returns to the normal user mode.

/ . Press the

5-5. Channel Name

This key switches the LCD display between the current

channel number and programmed channel name.

5-12. Talk Around

Press this key, the transceiver uses the receive frequency and the tone for transmission.

The operator can call the other party directory (without repeater). Press this key again, the talk around function goes off.

TK-6110

User mode

PC mode

PC programming mode

PC test mode

PC tuning mode

Panel test mode

Panel tuning mode

Clone mode

Main programming mode

OPERATING FEATURES / REALIGNMENT

5-13. Emergency Call

When the Emergency function (key) is activated, the ra-

dio enters the “Emergency Mode”.

In this mode, the radio automatically switches to the programmed “Emergency Channel” and starts transmission with the Emergency ID Code programmed in an installed ANI Board (dependent on ANI board capabilities and programming). The LCD display (Emergency Text) and the TX LED operation are dependent on the “Emergency CH Display” settings.

6. 2-Tone

2-Tone signalling opens the squelch only when the RADIO receives a proper 2-Tone code that is the same as the pre-programmed 2-Tone for the channel. When the RADIO receives a 2-Tone code, the CALL icon flashes.

If Transpond has been programmed, the RADIO will return an acknowledgment signal automatically after receiving the 2-Tone code.

If Alert Tone has been programmed, an Alert Tone sounds after receiving a 2-Tone code. Unmute condition is canceled and the CALL icon goes off when ; (1) pressing the [MON] Key, (2) hanging the microphone on its hook, (3) muting continues for 10 seconds. (If “Auto Reset” has been programmed)

7. DTMF

DTMF Signalling opens the squelch only when the RADIO receives a proper DTMF code that is the same as the pre-programmed “Primary Code (Individual ; 1~7digits)” or “Secondary Code (Group ; 1~7digits)”. When the RADIO receives a correct code, the CALL icon flashes.

If Transpond has been programmed, the RADIO will return an acknowledgment signal automatically after receiving the DTMF code.

If Alert Tone has been programmed, an Alert Tone sounds after receiving a DTMF code. Unmute condition is canceled and the CALL icon goes off when ; (1) pressing the [MON] Key, (2) hanging the microphone on its hook, (3) muting continues for 10 seconds (If “Auto Reset” has been programmed), and (4) receiving reset code. (Primary code + “#” or secondary code + “#”)

8-3. Programming Software KPG-59D Description

KPG-59D is the programming software for TK-6110 supplied on two 3.5" floppy disks. This software runs under MSDOS version 3.1 or later, and Windows MS-DOS prompt on an IBM-PC or compatible machine.

The data can be input to or read from TK-6110 and edited on the screen. The programmed or edited data can be printed out. It is also possible to tune the transceiver.

We recommend that install KPG-59D for example to harddisk first then use it.

KPG-46

IBM-PC

KPG-59D

TK-6110

Fig. 2

REALIGNMENT

1. Mode

8. Data Programming (PC Mode)

8-1. Preparation and Connection

The TK-6110 transceiver is programmed by using a personal computer, programming interface cable KPG-46, and programming software KPG-59D.

The programming software can be used with an IBM-PC or compatible machine. Figure 2 shows the setup for programming.

8-2. Programming Interface Cable KPG-46 Description

The KPG-46 is required to interface the transceiver with the computer. It has a circuit in its D-sub 25pin connector case that converts RS-232C logic level to TTL level.

KPG-46 is used to connect between transceiver microphone connector and RS-232C serial port of computer.

Mode Function

User mode Customer use this mode

PC mode Communication between the radio and

PC (IBM compatible).

It requires the KPG-59D.

PC programming Frequency, signalling and features write

mode to the radio and read from the radio.

PC test mode Check the radio using the PC.

This feature is included in the FPU.

Panel test mode Dealer uses to check the fundamental

(Refer to ADJUSTMENT)

Main programming Re-write to firmware of the flash ROM.

mode

characteristics.

REALIGNMENT

TK-6110

2. How to Enter Each Mode

Mode Operation

User mode Power on

PC mode Turn on the transceiver.

Then, set the transceiver to PC mode from

the menu in KPG-59D.

Panel test mode Hold down the [MON] key, turn the radio

power on.

Main programming

mode

Hold down the [A] key, turn the radio

power on.

3. Clone Mode

1. Turn the master side transceiver power on with the [SCN] key held down. The master side transceiver displays “CLONE”.

2. Set the power switch on the slave side transceiver to ON.

3. Connect the cloning cable (E30-3382-05) between the master side transceiver (source) and slave side transceiver (clone).

4. Press the [SCN] key on the master side transceiver to start cloning.

5. The TX LED on the master side transceiver flashes when cloning starts and an “END” message appears when cloning ends.

6. The BUSY LED on the slave side transceiver flashes.

7. When a problem occurs during cloning, an “ERROR” message appears on the slave side transceiver.

8. Pressing the [SCN] key sets clone mode again.

4-3. Programming

1. Set the transceiver to Main Programming Mode.

2. Connect the KPG-46 to the transceiver.

3. Start up the programming software (KPG-59D), select “firmware program” in the “Program” item, and press the Return key on the personal computer. This starts up the firmware programmer.

4. The top screen is displayed. Press any key to advance to the next screen.

5. Set the communications speed (normally, 115,200bps) and communications port in the Setup item.

6. Set the firmware to be updated by File select.

7. Held down the [A] key. Turn the transceiver power on. Until the display change to “PROG1152”

8. Check the connection between the transceiver and the personal computer, and make sure that the transceiver is in the Main Programming Mode.

9. Press F10 on the personal computer. A window opens on the display to indicate progress of writing. When the transceiver starts to receive data, “PG” is appeared on 2 digit sub display.

10. If writing ends successfully, the TX LED on the transceiver lights and the checksum is displayed.

11. If you want to continue programming other transceivers, repeat steps 5 to 8.

Notes :

• To start the Firmware Programmer from KPG-59D, the

Fpro path must be set up by KPG-59D setup.

• This mode cannot be entered if the Main Programming

mode is set to Disable in the Programming software (KPG-59D).

[SCN]

STARTCLONE

[SCN]

END

4. Main Programming Mode

4-1. Preface

Flash memory is mounted on the transceiver. This allows the transceiver to be upgraded when new features are released in the future. (For details on how to obtain the firmware, contact Customer Service.)

4-2. Connection Procedure

Connect the transceiver to the personal computer (IBM PC or compatible) with the interface cable (KPG-46). (Connection is the same as in the PC Mode.)

4-4. Function

1. If you press the [SCN] key while “PROG1152” is displayed, the checksum is displayed. If you press the [C] key while the checksum is displayed, “PROG1152” is redisplayed.

2. A transmission speed can be selected by pressing the [C] key while “PROG1152” is displayed.

115200bps : PROG1152 19200bps : PROG 192 38400bps : PROG 384 57600bps : PROG 576

Note :

Normally, write in the high-speed mode.

5. Panel Test Mode

Setting method refer to ADJUSTMENT.

TK-6110

1. Optional Voice Scrambler Function

The optional voice scrambler function can be used by two

methods.

1. Assign this function to any programmable keys by using the programming software (KPG-59D). When the programmed key is pressed, the appears and optional scrambler function is enabled. When the programmed key is pressed again, the cator disappears and the function is disabled.

2. Assign the optional scrambler function to each channel by using the programming software (KPG-59D). The optional scrambler function can be used without pressing the programmed key.

1-1. Scrambler Code Setting

The code can be configured by two methods.

1. Hold down the programmed OPT key to enter the code setting mode. Select a new code by pressing [ change. When the programmed key is pressed again, the new code is stored and exit the code setting mode.

2. Set a code for each channel by using the programming software (KPG-59D).

] or [ ] key to

INSTALLATION

indicator

indi-

TX-RX unit Component side

G H

2.Option Board Terminal

R725

Terminals for mounting the option board are provided at

the center of the TX-RX unit. The table shows the correspondence between the board and terminals. Disconnect

R778

R725 and R778 in TX-RX unit when the voice scrambler board is attached.

Connect the option board to the connection terminals of

the TX-RX unit.

Fig. 1

2-1. Option Port 1 (For ANI board etc.)

Port name

Abbreviation

(PCB)

(Schematic diagram)

B RX IN Data in Board data input. Connected to Reference

T DATA Data out Board data output. Connected to Reference

OUT ANI board → the circuit 1kHz/150mVrms →

Z TCONT T control Audio amplifier power control → CPU input L : Audio amp on

Name Description Connection Note

Transceiver (Receiver demodulaion circuit) → the circuit 1kHz STD DEV →

ANI board 250~350mVrms

Transceiver (Transmitter modulation circuit) 2.5~3.5kHz (Wide),

1.25~1.75kHz (Narrow)

TX-RX unit microprocessor H : Audio amp off

TK-6110

INSTALLATION

Port name

Abbreviation

(PCB)

(Schematic diagram)

X STONE Side tone Beep during PTT ID Connected to

R AUDI IH Audio inhibit Microphone muting during PTT ID Connected to

K GND Ground Ground Ground

W AUX Aux Emergency channel request → CPU input L : EMG CH request

J PTTO PTT Microprocessor PTT logic → ANI board CPU output L : TX, H : RX P EMERG Emergency Microprocessor emergency channel logic → CPU output L :

N BUSY

Y KEY

L +8V Board power Switched B Power supply

Name Description Connection Note

the circuit

TX-RX unit microprocessor H : No EMG CH request

Emergency operation request

ANI board H :

Channel busy

(Transmission)

Key TX-RX unit microprocessor H : No transmission request

supply

Microprocessor busy logic → ANI board CPU output L : Busy, H : Not busy Transmission start control GE-star → CPU input L : Transmission request

No emergency operation request

2-2. Option Port 2 (For voice scrambler etc.)

Port name

Abbreviation

(PCB)

(Schematic diagram)

G CODE 1

D CODE 2

E CODE 3

F CODE 4 A TXOUT TX out Board → Connected to Reference

M RXOUT RX out Board → Transceiver (Audio amp) Connected to

K GND Ground Ground Ground

J PTTO Scrambler modulation/demodulation control CPU output L : TX, H : RX

H CLRC Clear/Code Specifies whether to scramble CPU output L : Scramble, H : Normal B RXIN RX in Transceiver (Microphone circuit) → Board Connected to Reference

C TXIN TX in transceiver (Microphone circuit) → Board Connected to

L +8V Board power Switched B Power supply

Name Description Connection Note

Scrambler code 1

Scrambler code 2

Scrambler code 3

Scrambler code 4

supply

First of four bits of scrambler code CPU output Board code selection

Second of four bits of scrambler code (Logic by binary code)

Third of four bits of scrambler code

Fourth of four bits of scrambler code

Transceiver (Transmitter modulation circuit) the circuit 1kHz/15mVrms →

2.5~3.5kHz (Wide),

1.25~1.75kHz (Narrow)

the ciircuit

the circuit 1kHz STD DEV →

250~350mVrms

the circuit

TK-6110

INSTALLATION

3. Ignition Sense Cable (KCT-18)

The KCT-18 is an optional cable to use the following func-

tions:

3-1. Ignition function

The ignition function allows you to turn the transceiver’s

power on and off with the ignition key of your car. When you are driving with the ignition key on, the horn alert function is disabled.

3-2. Timed power off function

The timed power off function turns the transceiver’s

power off the time specified with the programming software (KPG-59D) after the ignition key is turned off. When you are driving with the ignition key on, the horn alert function is disabled.

The ignition sense function and the timed power off func-

tion can be used at the same time.

3-3. Modification

1. Remove the short plug from the accessory connector (15 pins) on the back of the transceiver.

2. Insert the KCT-18 into pin 3 (IGN).

13 15

Contact

2. Remove the terminals with the jumper from the connector housing holes number 9 and 12 using the extracting tool.

Removing the jumper lead (Fig. 3-2)

1) Insert the extracting tool (11-03-0002) into the connector while pushing the jumper lead in the direction of (a).

2) Push the extracting tool into collapse the barbs of the crimp terminal.

3) Pull out the lead while continuing to push the extracting tool in the direction (b).

3. Reinsert the terminal with the black and white stripe lead into hole number 6, and the terminal with the black lead into hole number 12 (Fig. 3-3).

4. Attach the connector to the external speaker connector on the radio.

KCT-18

Fig. 2

4. External Speaker (KES-4)

1. The external speaker output from the accessory connector (15 pins) on the back of the transceiver is 10W/4 ohms. Use the KES-4.

4-1. Connection for the KES-4 with the TK-6110

• When taking the AF output from the accessory connector (15-pin) on the rear of the radio

The following tools are required for changing the connec-

tor.

Extracting tool

the following extracting tool is recommended : Molex Inc. Order No. : 11-03-0002

1. Remove the connector with jumper from the external speaker connector on the rear panel of the radio (Fig. 3-

1). Note : Save the jumper, which is required when the radio is used without the external speaker.

Fig. 3-1 Fig. 3-2

Black lead

Black/White lead

13 15

Fig. 3-3

5. Horn Alert Function

The HR pin of the accessory connector (15-pin) on the rear of the transceiver is an open collector and the maximum current is 100mA. The maximum available current can be increased to 1A by installing a relay.

Program the Horn Alert Function, using KPG-59D.

HR (Pin 10)

Fig. 4

CIRCUIT DESCRIPTION

TK-6110

1. Overview

The KENWOOD model TK-6110 is a VHF/FM transceiver designed to operate in the frequency range of 29.7 to 37MHz (K), 35.0 to 50.0MHz (K2), the unit consists of a receiver, a transmitter, a phase-locked loop (PLL) frequency synthesizer, power supply circuits, a control unit.

2. Circuit Configuration by Frequency

The receiver is a double-conversion superheterodyne with a first intermediate frequency (IF) of 128.55MHz and a second IF of 455kHz. Incoming a signals from the antenna are mixed with the local signal from the PLL1 to produce the first IF of 128.55MHz.

This is then mixed with the 129.005MHz seconds local oscillator output to produce the 455kHz second IF. This is detected to give the demodulated signal.

The transmit signal is modulated PLL2-VCO2 (129.005 MHz) from the microphone. The transmit signal frequency is down-conversion with PLL2 and PLL1. It is then amplified and sent to the antenna.

ANT

TX/RX

29.7~37.0MHz : K

35.0~50.0MHz : K2

LPF

AMP

ANT

AMP

29.7~

37.0MHz : K

35.0~

50.0MHz : K2

1st MIX

MCF

128.55MHz

TX MIX

129.005 MHz

158.705~166.005MHz : K

164.005~179.005MHz : K2

158.25~165.55MHz : K

163.55~178.55MHz : K2

455kHz

FM IF

SYSTEM

129.005 MHz

PLL2

VCO2

AMP

MIC

AMP

PLL1

VCO1

3. Receiver System

3-1. Front-End RF Amplifier

An incoming signal from the antenna is applied to a bandpass filter (L202) after going through a low-pass filter and an antenna switch (K1). The signal is then amplified by the RF amplifier (Q201) and again filtered by another band-pass filter (L203, L206 and L207).

3-2. First Mixer

The signal from the band-pass filter is heterodyned with the first local oscillator signal from the PLL frequency synthesizer circuit at the first mixer (IC201) to become a

128.55MHz first intermediate frequency (IF) signal.

The first IF signal is fed through two monolithic crystal filters (XF201) to further remove spurious signals.

3-3. IF Amplifier

The first IF signal is amplified by Q202 and Q205, and then enters IC202 (FM processing IC). The signal is heterodyned again with a second local oscillator signal (129.005MHz) with in IC202 to become a 455kHz second IF signal. The second IF signal is fed through a 455kHz ceramic filter, CF201 and CF202 to further eliminate unwanted signals before it is amplified and FM detected in IC202.

IC201

1st MIX

MIC

BPF

Q202

IF AMP

Q201

RF AMP

128.55MHz

BPF BPF LPF

MCF

XF201

IF AMP

Q205

FM IF SYSTEM

129.005MHz

Fig. 2 Receiver section

IC202

D502

T/R SW

CF201,202 455kHz

Fig. 1 Frequency configuration

Item Rating

Nominal center frequency 128.55MHz Pass bandwidth ±7.5kHz or more at 3dB Attenuation bandwidth ± 35kHz or less at 40dB

Ripple 1.0dB or less

Insertion loss 5dB or less Guaranteed attenuation 70dB or more at fo±910kHz Terminating impedance 1000Ω

Table 1 Crystal filter (L71-0560-05)

(TX-RX unit XF201)

TK-6110

CIRCUIT DESCRIPTION

3-4. Audio Amplifier Circuit

The recovered audio signal obtained from IC202 is amplified by IC709, IC713, low-pass filtered by IC713 high-pass filtered by IC713 and band-eliminate filtered by IC713.

The audio signals then passed through a de-emphasized by IC713. The processed audio signal passes through an audio volume control and is amplified to a sufficient level to drive a loudspeaker by an audio power amplifier BTL (IC102).

IC203

CF201,202 455kHz

FM IF SYSTEM

129.005 MHz

IC713

HPF

IC202

IC709 (2/2)

AF AMP

HPFLPF BEF

IC710

VOL

DE-

EMP

IC711 (2/2)

AF AMP

EXP

IC710

VOL

MUTE

IC105

MUTE

AM1

IC102

AMP

ES2

Fig. 3 Audio amplifier circuit

3-5. Squelch Circuit

The output signal from IC202 enters FM IC again, then passed through a band-pass filter. The noise component output from IC202 is amplified by Q206 and rectified by D205 to produce a DC 0 voltage corresponding to the noise level. The DC voltage is sent to the analog port of the CPU (IC604).

And IC202 outputs a DC voltage (RSSI) corresponding to the input of the IF amplifier.

AF OUT

IC604

CPU

31 SQL

Output

expander

Mute circuit

DET OUT

Noise

amp

IC202

Q206 D206

Noise

amp

DET

Fig. 4 squelch circuit

IC714 (2/2)

AMPMIC1

D711

LIMIT

IC713

HPF

4. Transmitter System

4-1. Microphone Amplifier

The signal from the microphone is high-pass filtered by IC713, passed through microphone mute and microphone amplifier circuit (Q703 and IC714), limited and pre-emphasized by IC713 and D711.

4-2. Modulator Circuit

The output of Audio-processor (IC703) is passed to the D/ A converter (IC710) for maximum deviation adjustment and the summing amplifier (IC711) before being applied to a varactor diode in the voltage controlled oscillator (VCO) located in the frequency synthesizer section.

4-3. Down-Mixer

At Q503, a modulated VCO2 signal is mixed with 2nd local oscillator signal, 129.005MHz. The difference of the two signals is used for the transmission signal 29.7~37MHz (K),

35.0~50.0MHz (K2). The output was filtered through a lowpass filter.

ALC

COMP

Q708

18 19

TONE

LPF HPF IDC

PRE

EMP

MIC2 (External

input)

MC1

MC2

IC711 (1/2)

LSD

IC710IC712

D/A

Fig. 5 Microphone circuit

SUM

AMP

L517

VCO

CIRCUIT DESCRIPTION

PDAT,PCLK,LE

TCXO

LPF

VCO2

VCO1

BUFF

BUFF SW

BUFF

CPU

16.8MHz

Dual PLL

8TB/8R

TX local 1

RX local 1

TX local 2

RX local 2

MOD/TONE

TK-6110

4-4. Driver and Final Power amplifier Circuits

The transmit signal is generated by the TX mixer (Q503). The transmit signal obtained from the buffer amplifier Q1 and Q2, is amplified by Q3 to approximately 30dBm. This amplified signal is amplified by Q4 and Q5 to approximately 8W, and this signal is passed to the final stage.

The RF power amplifier consists of transistor (Q6 and Q7) and is capable of roducing up to 70W of RF power.

4-5. Transmit/Receive Switching Circuit

The final output signal is passed through a transmit/receive switching circuit (K1) before it is passed to the antenna terminal.

4-6. Automatic Power Control, Circuit and Transmitter

The APC circuit consists of an RF level detector, an exciter control section and a temperature sensing circuit. The RF level detector senses the forward and reflected power. The transmitter output power is kept constant by the exciter control circuit which monitors the forward power and regulates the supply voltage applied to the exciter section.

If the antenna load becomes abnormal, the reflected power increases, causing the exciter control circuit to reduce the supply voltage to the exciter. In case of an abnormal temperature rise in the power amplifier section, the temperature sensing circuit detects this condition and send the information to the APC circuit. These actions reduce the transmitter output power to a safe operating level.

5. PLL Frequency Synthesizer

The frequency synthesizer consists of the VCXO (X501),

VCO (L517), PLL IC (IC501) and buffer amplifiers.

The VCXO generates 16.8MHz reference frequency. The

frequency stability is within ±5.0ppm (temperature range of –30 to +60°C). The output of the VCXO is applied to pin 8 of

the PLL IC.

VCO (L517) has 2 internal VCOs. One for the 1st local oscillator (K : 158.25~166.005MHz, K2 : 163.55~179.005 MHz) and another one for the 2nd local oscillator (129.005MHz). Each output is connected to a dual PLL IC (IC501).

VCO1 oscillates at K : 158.705~166.005MHz, K2 :

164.005~179.005MHz during transmission and it oscillates at K : 158.25~165.55MHz, K2 : 163.55~178.55MHz during reception.

VCO2 oscillates at 129.005MHz during both reception and transmission. However, the oscillated signal is modulated during transmission. Each PLL circuit has LPFs and buffer amplifiers.

The output of VCO1 goes through the buffer amplifier, then the output is switched either for the 1st local oscillator circuit of the receiver or TX mixer.

The output of VCO2 goes through the buffer amplifier, then the output is switched either for the 2nd local oscillator circuit of the receiver or TX mixer.

Q503

mixer

amp

Predrive

amp

Drive

amp

Drive

amp

Fig. 6 Drive and final amplifier

Fig. 7 PLL block diagram

RF power

amp

RF power

amp

TX/RX

ANT SW

ANT

LPF

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