hit counter script
Kenwood TK-868G Service Manual
  1. Manuals
  2. Brands
  3. Kenwood Manuals
  4. Transceiver
  5. TK-868G
  6. Service manual

Kenwood TK-868G Service Manual

Uhf fm transceiver
Hide thumbs Also See for TK-868G:
Table of Contents

Advertisement

Quick Links

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.
文档版权信息
Kenwood Corporation 拥有版权 2006 。保留所有权利。
未经 Kenwood 公司预先书面同意，无论出于何种目的，均不得以任何形式或任何方式包
括电子、机械、影印、录音或其他方式复制、翻译、分发或传播本手册的任何部分。
免责声明
Kenwood 公司在准备本文档时已采取所有必要的预防措施，恕不对错误或疏漏承担任何
责任，也不对因使用本文中所含的信息而导致的损害负责。 Kenwood 公司保留出于改进
的需要而随时对文中的产品信息做出更改的权利。

Advertisement

Table of Contents
loading

Related Manuals for Kenwood TK-868G

Summary of Contents for Kenwood TK-868G

  • 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 the right to make changes to any products herein at any time for improvement purposes.

  • Page 2: Table Of Contents

    SERVICE MANUAL / 128 channels / 128 © 2001-3 B51-8566-00 ( N ) 617 This TK-868G service manual contains a number of sec- SUPPLEMENT / tions which differ from the service manual (B51-8500-00) for the TK-868G. For items other than those in this TK-868G service manual please refer to the service manual (B51-8500-00) for the TK-868G.

  • Page 3: Self Programming Mode

    TK-868G REALIGNMENT / Service Manual List Title Parts number Remarks Destination TX-RX unit PCB number TK-868G B51-8500-00 C,C3 J72-0678-02 TK-868G B51-8502-00 M,M3 J72-0678-02 TK-868HG B51-8541-00 SUPPLEMENT J72-0760-02 TK-868HG B51-8541-10 REVISED C,C3 J72-0760-12 TK-868G B51-8566-00 SUPPLEMENT J72-0760-22 This Service manual Frequency range...

  • Page 4: Installation

    TK-868G INSTALLATION / Modifying the Transceiver Ignition Sense Cable (KCT-18 : Option) Modify the transceiver as follows to turn the power or the The KCT-18 is an optional cable for enabling the ignition Horn Alert or Manual Relay function on and off with the igni- function.

  • Page 5: Installation Procedure

    TK-868G INSTALLATION / PA/HA Unit (KAP-1 : Option) Modifying the Transceiver Installing the KAP-1 in the Transceiver Horn alert The Horn Alert (max. 2A drive) and Public Address func- The signal from pin 4 of IC9 on the TX-RX unit turns Q5 tions are enabled by inserting the KAP-1 W1 (3P;...

  • Page 6: Public Address

    TK-868G INSTALLATION / Public address The signal from pin 13 of IC9 on the TX-RX unit drives PA relay in the KAP-1 and switches the audio power amplifier output between the external PA system (through KCT-19) and internal and external speakers.

  • Page 7: Emergency Mode

    TK-868G INSTALLATION / Emergency Mode Transceiver Modification Procedure install the foot switch Install the foot switch through the KCT-19 and KCT-18. When the switch is treaded on, the radio enters the emer- gency mode. Change the power switch circuit TX-RX unit (B/2) : Control section $R705 : Attach (R92-1252-05, 0Ω)
  • Page 8 TK-868G INSTALLATION / Emergency Mode System Chart Press the Foot switch once Emergency mode Emergency channel LCD dots light TX 25 sec. ← → RX 5 sec. Dots Foot switch 1 push Emergency ACK code receive LCD dots light After 1 min.

  • Page 9: Parts List

    TK-868G PARTS LIST / CAPACITORS CC 45 TH 1H 220 J • Capacitor value Color* CC45 010 = 1pF 0 = 22pF 100 = 10pF 1 = Type … ceramic, electrolytic, etc. 4 = Voltage rating Multiplier 101 = 100pF 2 = Shape …...
  • Page 10 TK-868G PARTS LIST / New Parts. indicates safety critical components. L : Scandinavia K : USA P : Canada Parts without Parts No. are not supplied. Y : PX (Far East, Hawaii) T : England E : Europe Les articles non mentionnes dans le Parts No. ne sont pas fournis.
  • Page 11 TK-868G PARTS LIST / TX-RX UNIT (X57-5963-09) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C92-0507-05 CHIP-TAN 4.7UF 6.3WV C148,149 CK73GB1H471K CHIP C 470PF CC73GCH1H101J CHIP C 100PF C150 CK73FF1C105Z CHIP C 1.0UF...
  • Page 12 TK-868G PARTS LIST / TX-RX UNIT (X57-5963-09) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C247 CK73GB1H102K CHIP C 1000PF C559 CK73GB1H102K CHIP C 1000PF C248 C92-0585-05 CHIP-TAN 4.7UF 16WV...
  • Page 13 TK-868G PARTS LIST / TX-RX UNIT (X57-5963-09) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation J501 E08-0877-05 MODULAR JACK RK73GB1J104J CHIP R 100K 1/16W RK73GB1J220J CHIP R 1/16W F53-0108-05 FUSE...
  • Page 14 TK-868G PARTS LIST / TX-RX UNIT (X57-5963-09) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation RK73GB1J271J CHIP R 1/16W R163 R92-0670-05 CHIP R 0 OHM RK73GB1J102J CHIP R 1.0K 1/16W...
  • Page 15 TK-868G PARTS LIST / TX-RX UNIT (X57-5963-09) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation R535 RK73GB1J332J CHIP R 3.3K 1/16W R602 RK73GB1J473J CHIP R 1/16W R536 RK73GB1J153J CHIP R...
  • Page 16 TK-868G PARTS LIST / TX-RX UNIT (X57-5963-09) PLL/VCO (X58-4670-16) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation D527,528 DA204U DIODE 3SK240 D527,528 HSB123 DIODE DTC144EKA DIGITAL TRANSISTOR D529 MA742 DIODE...
  • Page 17 TK-868G PARTS LIST / PLL/VCO (X58-4670-16) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation R114 RK73GB1J470J CHIP R 1/16W R115 RK73GB1J103J CHIP R 1/16W R116 RK73GB1J392J CHIP R 3.9K 1/16W...

  • Page 18: Exploded View

    TK-868G EXPLODED VIEW / Parts with the exploded numbers larger than 700 are not supplied.

  • Page 19: Packing

    TK-868G PACKING / 31 Polystyrene foamed fixture (R) (H10-6619-12) 33 Protection bag (H25-0720-04) 8 Instruction manual (B62-1259-20) 30 Polystyrene foamed fixture (F) (H10-6618-12) 34 Item carton case (H52-1520-02) Parts with the exploded numbers larger than 700 are not supplied.

  • Page 20: Test Mode

    TK-868G ADJUSTMENT / Test Mode Test Mode Operating Features This transceiver has a test mode. To enter test mode, press [SCN] key and turn power on. Hold [SCN] key until test channel No. and test signalling No. appears on LCD.
  • Page 21 TK-868G ADJUSTMENT / Signalling Signalling No. None None None 100Hz square QT 67.0Hz QT 67.0Hz QT 151.4Hz QT 151.4Hz QT 210.7Hz QT 210.7Hz QT 250.3Hz QT 250.3Hz DQT D023N DQT D023N DQT D754I DQT D754I DTMF DEC, (159D) DTMF ENC, (159D)
  • Page 22 TK-868G ADJUSTMENT / Tuning Mode Display Function name FREQ_ _XX Frequency adj. HPOW_XXX H.POW_XXX H.P.OW_XXX H.P.O.W_XXX H.P.O.W._XXX H.P.O.W._.XXX RF high power Hi power (L) Hi power (L') Hi power (C) Hi power (H') Hi power (H) [D/A] [D/A] [D/A] [D/A]...

  • Page 23: Adjustment

    TK-868G ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifications 1. Standard Signal Generator Frequency Range 350 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 24 TK-868G & – 1 : BLC 2 : PSB 3 : E 4 : PTT 5 : ME 6 : MIC 7 : HOOK 8 ; CM...
  • Page 25 TK-868G ADJUSTMENT Common Section Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ±0.1V 1. PLL lock 1) Set test mode TX-RX CV TC106 7.0V voltage CH : CH3 - Sig1 Power meter (A/2) F. conter 2) PTT : ON (Transmit) TC109 7.0V...
  • Page 26 TK-868G...
  • Page 27 TK-868G ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 3. Squelch 3 1) Set test mode Rear Front CH / Adjust to the • Wide Select “SQL3” in tuning mode. panel panel squelch threshold “S.QL3”...
  • Page 28 TK-868G...
  • Page 29 TK-868G ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 6. QT check 1) Set test mode Rear CH : CH1 - Sig4 panel SSG MOD AF VTVM INT : 3kHz (Wide), 1.5kHz (Narrow) Distortion (EXT.SP) EXT : 151.4Hz...
  • Page 30 TK-868G...
  • Page 31 TK-868G ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 0.5W 3) “L.P.O.W” Power meter Rear Front CH / 5.0W PTT : ON panel panel Adjust [ *** ] 4) “L.P.O.W.” PTT : ON Adjust [ *** ] 5) “L.P.O.W._.”...
  • Page 32 TK-868G...
  • Page 33 TK-868G ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 2.4kHz~3.4kHz 8. MIC 1) Set test mode Power meter Rear Check seisitivity CH : CH1 - Sig1 Deviation panel check AG : 1kHz/5mV meter PTT : ON...
  • Page 34 TK-868G...

  • Page 35: Pll/Vco (X58-4670-16)

    Chassis The tuning data (Deviation, Squelch, etc.) for the EEPROM, Use jig (Part No. : A10-4010-02) for repairing the TK-868G. is stored in memory. When parts are changed, readjust the The jig facilitates the voltage check when the voltage on the transceiver.

  • Page 36: Tx-Rx Unit (X57-5963-09) (A/2)

    LEVEL DIAGRAM / Receiver Section / Center Frequency 49.95MHz 450kHz Audio Frequency SG input level for 12dB SINAD are obtained measured by connecting SG to each point via a 0.01µF capacitor. AF VTVM AF level obtained when the AF output level is adjusted for 0.45V/4Ω with the front panel AF VOL control.
  • Page 37 TK-868G DISPLAY UNIT (X54-3270-10) DISPLAY UNIT (X54-3270-10) Component side view Foil side view PLL/VCO (X58-4670-16) Component side view J72-0676-02 C115 C119 L109 CN101 L103 C104 L112 (ST) 6 C122 Q105 L106 Q106 R109 Q102 C125 R111 C127 R110 R108 R115...
  • Page 38 TK-868G TX-RX UNIT (X57-5963-09) (A/2) Component side view Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address IC13 IC400 Component side IC400 Pattern 1 Pattern 2 IC11 Pattern 3 IC12 Pattern 4 Foil side C192 C198 EXT. SP...
  • Page 39 TK-868G Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address TX-RX UNIT (X57-5963-09) (A/2) Foil side view D16 11N Q18 13N D18 12Q IC10 Component side IC400 IC14...
  • Page 40 TK-868G Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address IC13 TX-RX UNIT (X57-5963-09) (A/2) Component side view + Foil side IC14 IC15 Q10 13M...
  • Page 41 TK-868G TX-RX UNIT (X57-5963-09) (B/2) Component side view D512 J72-0760-22 B/2 D511 R566 C543 C632 L501 R567 R560 C501 C542 IC510 R561 IC507 R533 C517 R517 C525 C537 R564 R505 R543 IC513 R563 C541 R562 C527 C528 R535 R520 IC514...
  • Page 42 TK-868G TX-RX UNIT (X57-5963-09) (B/2) Component side view + Foil side J72-0760-22 B/2 D512 R550 D511 R548 R501 R553 R612 C534 R566 C543 C632 R567 L501 C542 R613 R560 R595 C530 C501 R558 C536 R554 IC505 R561 IC510 R526 R593...

  • Page 43: Schematic Diagram

    TK-868G SCHEMATIC DIAGRAM / Note : Components marked with a dot (·) are parts of patterun 1.

  • Page 44: Block Diagram

    TK-868G TK-868G TK-868G BLOCK DIAGRAM /...

  • Page 45: Specifications

    TK-868G SPECIFICATIONS GENERAL Frequency Range ........ C6 : 350 to 390MHz Number of Channels ......Maximum 128 channels Number of Groups ......Maximum 128 channels Channel Spacing ......... Wide : 25kHz Narrow : 12.5kHz PLL Channel Stepping ......5, 6.25kHz Operating Voltage .......
  • Page 46 TK-868G...
  • Page 47 Mechelsesteenweg 418 B-1930 Zaventem, Belgium KENWOOD ELECTRONICS FRANCE S.A. 13, Boulevard Ney, 75018 Paris, France KENWOOD ELECTRONICS U.K. LIMITED KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB United Kingdom KENWOOD ELECTRONICS EUROPE B.V. Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands KENWOOD ELECTRONICS ITALIA S.p.A.

Table of Contents