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Kenwood TK-8102 Service Manual

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Document Copyrights
Copyright 2006 by Kenwood Corporation. All rights reserved.
No part of this manual may be reproduced, translated, distributed, or transmitted in any
form or by any means, electronic, mechanical, photocopying, recording, or otherwise, for
any purpose without the prior written permission of Kenwood.
Disclaimer
While every precaution has been taken in the preparation of this manual, Kenwood
assumes no responsibility for errors or omissions. Neither is any liability assumed for
damages resulting from the use of the information contained herein. Kenwood reserves
the right to make changes to any products herein at any time for improvement purposes.

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Summary of Contents for Kenwood TK-8102

  • Page 1 Kenwood. Disclaimer While every precaution has been taken in the preparation of this manual, Kenwood assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein. Kenwood reserves...
  • Page 2 TK-8102 UHF FM TRANSCEIVER TK-8102 SERVICE MANUAL REVISED © 2001-7 PRINTED IN JAPAN B51-8585-10 ( S ) 281 Cabinet Front glass Panel assy (A01-2178-02) (B10-2668-03) (A62-0942-03) Key top (K29-9065-01)

  • Page 3: Table Of Contents

    TK-8102 CONTENTS / GENERAL CONTENTS GENERAL INTRODUCTION GENERAL ..............2 SCOPE OF THIS MANUAL OPERATING FEATURES ......... 4 This manual is intended for use by experienced techni- REALIGNMENT ............7 cians familiar with similar types of commercial grade com- munications equipment. It contains all required service in- DISASSEMBLY FOR REPAIR ........

  • Page 4: General

    Your KENWOOD dealer can help you select an antenna sys- tem that will best serve your particular needs. 3-2. Testing 5-2.

  • Page 5: Operating Features

    TK-8102 OPERATING FEATURES 1-4. Display 1. Controls and Functions 1-1. Front Panel q w e Indicator Description Light while transmitting. Lights when a signal is detected 1-2. Microphone on the currently selected channel. Li g hts w hi l e t he f u n ct i o n p r o - grammed onto its corresponding key is activated.
  • Page 6 OPERATING FEATURES • Scan ON/OFF 2. Operation Features Press this key starts scanning. Pressing this key stops The TK-8102 is a UHF FM radio designed to operate in scanning. conventional format. The programmable features are sum- • Talk around marized.
  • Page 7 TK-8102 OPERATING FEATURES Temporary delete Clear to transpond It is possible to delete channel temporary during scan. The transceiver waits the transpond of DTMF if channel When scan stops on unnecessary channel for example by is busy until channel open. This feature prevents the inter- interference of the other party, activate the delete function ference to other party.
  • Page 8 For group calls, only the group tone will sound, not the transpond tone. 3-2. Connection Procedure 1. Connect the TK-8102 to the personal computer with the Pre alert tone interface cable. Sounds prior to the TOT TX inhibit activation. If TOT pre 2.

  • Page 9: Realignment

    NOTE: Clone mode should enabled. 1. Turn the master TK-8102 power ON with the [1] key held down. The TK-8102 [ ] LED is turned on. 2. Power on the slave TK-8102.

  • Page 10: Disassembly For Repair

    TK-8102 DISASSEMBLY FOR REPAIR 3. To remove the display unit PCB, detach the PCB by 1. When you remove the panel, turn the transceiver up lifting at the indents of the PCB as shown below. side down. Detach the panel by lifting the tabs as shown below.

  • Page 11: Circuit Description

    TK-8102 CIRCUIT DESCRIPTION IF Amplifier Frequency Configuration The first IF signal is amplified by Q19, and the enters IC5 The receiver utilizes double conversion. The first IF is (FM processing IC). The signal is heterodyned again with a 49.95MHz and the second IF is 450kHz. The first local oscil- second local oscillator signal within IC5 to create a 450kHz lator signal is supplied from the PLL circuit.
  • Page 12 TK-8102 CIRCUIT DESCRIPTION Wide/Narrow Changeover Circuit Squelch Circuit The Wide port (pin 92) and Narrow port (pin 91) of the The detection output from the FM IF IC (IC5) passes CPU is used to switch between ceramic filters. When the through a noise amplifier (Q18) to detect noise.
  • Page 13 TK-8102 CIRCUIT DESCRIPTION IC1 : PLL IC TX VCO 5kHz/6.25kHz BUFF D10,12 Phase Charge comparator pump DATA RX VCO Q7,12 T/R SW 5kHz/6.25kHz D9,11 16.8MHz Fig. 6 PLL circuit Unlock Circuit Transmitter System During reception, the 8RC signal goes high, the 8TC sig- Outline nal goes low, and Q29 turns on.
  • Page 14 Key Matrix Circuit 2) Adjusts the AF signal level of the AF filter (IC10) and turns The TK-8102 front panel has function keys. Each of them the filter select compounder on or off. is connected to a cross point of a matrix of the KMI1 to 3) Controls the DTMF decoder (IC9).
  • Page 15 TK-8102 CIRCUIT DESCRIPTION Encode D/A Converter The QT and DQT signals are output from QT/DQT of the The D/A converter (IC3) is used to adjust MO modulation, CPU (IC6) and summed with the external pin DI line by the AF volume, TV voltage, FC reference voltage, and PC summing amplifier (IC4) and the resulting signal goes to the POWER CONTROL voltage level.

  • Page 16: Semiconductor Data

    TK-8102 SEMICONDUCTOR DATA Microprocessor : 784214AGCXXX (TX-RX Unit IC6) Terminal function Pin No. Name Function Pin No. Name Function FNC8 Function Port8 DTMOSC DTMF IC Clock Control PLLE PLL IC Chip Select MUTE1 AF Mute EVLLD E-Volume LD MUTE2 Speaker Mute...

  • Page 17: Description Of Components

    TK-8102 DESCRIPTION OF COMPONENTS Display Unit (X54-3340-20) Ref. No. Use/Function Operation/Condition DIODE ANT SW SYMBOL PARTS NAME DISCRIPTION DIODE APC VOLTAGE DETECT D1~4 KEY BACKLIT DIODE APC VOLTAGE DETECT MONITOR KEY LIGHT DIODE REVERSE CONNECT PROTECTION PROGRAMMABLE KEY LIGHT DIODE...
  • Page 18 TK-8102 DESCRIPTION OF COMPONENTS Ref. No. Use/Function Operation/Condition TRANSISTOR DC SWITCH(SB) /Active when power on TRANSISTOR AF MUTE /Active while Mute3 is H TRANSISTOR BEAT SHIFT /Active while Beat shift is on TRANSISTOR OVER VOLTAGE DETECTION /Active while PS voltage is more than 18V...

  • Page 19: Parts List

    TK-8102 PARTS LIST CAPACITORS CC 45 TH 1H Capacitor value Color* CC45 010 = 1pF 0 = 22pF 100 = 10pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating Multiplier 2 = Shape ... round, square, ect.
  • Page 20 TK-8102 PARTS LIST ∗ New Parts. indicates safety critical components. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. TX-RX UNIT (X57-6300-XX) TK-8102 Ref.
  • Page 21 TK-8102 PARTS LIST TX-RX UNIT (X57-6300-XX) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts CC73GCH1H0R5B CHIP C 0.5PF C145 CC73GCH1H060B CHIP C 6.0PF CC73GCH1H040B CHIP C 4.0PF C146 CK73GB1H471K CHIP C 470PF...
  • Page 22 TK-8102 PARTS LIST TX-RX UNIT (X57-6300-XX) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C226 CK73GB1C683K CHIP C 0.068UF K C316 C92-0516-05 CHIP-TAN 4.7UF 16WV C228 CK73GB1H471K CHIP C 470PF C318 CK73GB1H471K...
  • Page 23 TK-8102 PARTS LIST TX-RX UNIT (X57-6300-XX) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts TC2,3 C05-0399-05 CERAMIC TRIMMER CAP(6PF) L34-4604-05 AIR-CORE COIL M,M2 C05-0399-05 CERAMIC TRIMMER CAP(6PF) M,M2 L34-4605-05 AIR-CORE COIL C05-0399-05...
  • Page 24 TK-8102 PARTS LIST TX-RX UNIT (X57-6300-XX) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts RK73GB1J683J CHIP R J 1/16W R142-144 RK73GB1J102J CHIP R 1.0K J 1/16W RK73GB1J473J CHIP R J 1/16W R145...
  • Page 25 TK-8102 PARTS LIST TX-RX UNIT (X57-6300-XX) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts R211 RK73GB1J473J CHIP R J 1/16W R286 RK73GB1J124J CHIP R 120K J 1/16W R213 R92-0685-05 CHIP R J 1/2W...
  • Page 26 TK-8102 PARTS LIST TX-RX UNIT (X57-6300-XX) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts MA4PH633 DIODE DTC363EU DIGITAL TRANSISTOR D31,32 XB15A709 DIODE KTA1664(Y) TRANSISTOR MA742 DIODE Q34,35 KRC102S DIGITAL TRANSISTOR MA742 DIODE...

  • Page 27: Exploded View

    TK-8102 EXPLODED VIEW N67-3008-46 PAN HEAD SEMS SCREW N87-2606-46 BRAZIER HEAD TAPTITE SCREW N87-2614-46 BRAZIER HEAD TAPTITE SCREW (For KEY 1 only) Part name label face down DISPLAY UNIT TX-RX UNIT Parts with the exploded numbers larger than 700 are not supplied.

  • Page 28: Packing

    TK-8102 PACKING 28 Bracket D SCREW SET (J29-0662-03) (N99-0395-05) 8 DC cord (E30-3339-05) 25 Protection bag (H25-0103-04) 22 Inner Packing Case (H02-0617-02) 5 Instruction Manual (B62-1389-00) 24 Polystyrene Foamed Fixture 23 Polystyrene Foamed Fixture (H10-6639-03) (H10-6636-03) 26 Protection Bag (H25-2320-04)

  • Page 29: Adjustment

    TK-8102 ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifications 1. Standard Signal Generator Frequency Range 400 to 520MHz (SSG) Modulation Frequency modulation and external modulation Output –127dBm/0.1µV to greater than –7dBm/100mV 2. Power Meter Input Impedance 50Ω Operation Frequency...
  • Page 30 TK-8102 ADJUSTMENT Note Adjustment Location • EEPROM Switch The tuning data (Deviation, Squelch, etc.) for the Volume EEPROM, is stored in memory. When parts are changed, up/down Display Power PF key readjust the transceiver. • AF PA IC (IC102) Speaker How to mounting the IC102.
  • Page 31 Wide/Narrow CH: RX high: Wide 2) SSG output: 2dB above to 12dB SINAD level: Wide/Narrow Mod: 1kHz Dev: ±3.0kHz: Wide Dev: ±1.5kHz: Narrow Test frequency(MHz) TK-8102 M TK-8102 M2 TK-8102 M3 Channel Channel Channel 1: Center 470.100 470.050 1: Center 502.600...
  • Page 32 CH: TX high: Wide 2) Transmit ±3.0kHz: Wide ±0.2kHz 9. DTMF 1) CH: TX center: Wide/Narrow ±1.5kHz: Narrow 2) Transmit deviation Test frequency(MHz) TK-8102 M TK-8102 M2 TK-8102 M3 Channel Channel Channel 1: Center 470.100 470.050 1: Center 502.600 502.550 1: Center 415.10000...
  • Page 33 TK-8102 ADJUSTMENT BPF-Wave • TK-8102 M • TK-8102 M2 • TK-8102 M3 TK-260 :K, K2...

  • Page 34: Pc Board Views

    TK-8102 PC BOARD VIEW DISPLAY UNIT (X54-3340-20) Component side view + Foil side view DISPLAY UNIT (X57-3340-20) Component side view MONI POWER HOOK DOWN PROG POWER LEDMON LEDPF LEDC1 LEDC2 LEDR LEDG MICBL LEDC3 LEDC4 KMI1 KMI2 KMI3 KMI4 KMO1...

  • Page 35: Tx-Rx Unit (X57-6300-Xx)

    TK-8102 PC BOARD VIEW TX-RX UNIT (X57-6300-XX) Component side view -20:M, -21:M2, -22:M3 TX-RX UNIT (X57-6300-XX) Component side view R262 C323 IC101 C525 C514 C295 R239 C299 R238 C296 R265 C291 C328 Q101 C292 R247 R244 R250 R236 R241 C254...
  • Page 36 TK-8102 PC BOARD VIEW TX-RX UNIT (X57-6300-XX) Foil side view -20:M, -21:M2, -22:M3 TX-RX UNIT (X57-6300-XX) Foil side view C327 R268 C523 R233 C246 C233 C251 R221 C271 C239 C255 C216 R237 C199 C197 C369 C228 R306 R296 C174 R283...
  • Page 37 TK-8102 PC BOARD VIEW TX-RX UNIT (X57-6300-XX) Component side view + Foil side view -20:M, -21:M2, -22:M3 TX-RX UNIT (X57-6300-XX) Component side + Foil side view C327 R268 R262 C323 IC101 C525 C514 C295 R239 C299 R238 C296 R265 C291...

  • Page 38: Schematic Diagram

    TK-8102 SCHEMATIC DIAGRAM Note : Component marked with a dot ( ) are parts of pattern1.

  • Page 39: Block Diagram

    TK-8102 TK-8102 BLOCK DIAGRAM...

  • Page 40: Level Diagram

    TK-8102 TK-8102 LEVEL DIAGRAM RX section TX section...

  • Page 41: Terminal Function

    TK-8102 TERMINAL FUNCTION J1 (TX-RX Unit) CN1 (TX-RX Unit) Pin No. Name Function Pin No. Name Function Ground Audio signal output to internal/external speaker. PTT/TXD Ground HOOK Hook detection/RXD Mic ground J1 (Control Unit) Mic signal input Pin No. Name...

  • Page 42: Specifications

    KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD. KENWOOD ELECTRONICS U.K. LIMITED Sales Marketing Division KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB United Kingdom 1 Ang Mo Kio Street 63, Singapore 569110 KENWOOD ELECTRONICS EUROPE B.V. Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands...

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