Kenwood TK-390 Service Manual
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Kenwood TK-390 Service Manual

Kenwood TK-390 Service Manual

Uhf fm transceiver
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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-390

  • 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: Table Of Contents

    KRA-14 (ANTENNA) ..........73 SPECIFICATIONS ....... BACK COVER CAUTION When using an external power connector, Photo is TK-390 K4 type. please use with maximum final module protec- Does not come with antenna. tion of 10V Antenna is available as an option.

  • Page 3: General

    NOTE quired component for proper identification. WE CANNOT guarantee oscillator stability when using channel element manufactured by other than KENWOOD or its authorized agents. FCC COMPLIANCE AND TYPE NUMBERS Model...

  • Page 4: Operating Features

    TK-390 OPERATING FEATURES - DTMF keypad (keypad models only) 1. Getting Acquainted Press the keys on the telephone keypad to send DTMF tones. SMA male type Battery pack antenna connector release latch = Universal connector Connect the external speaker/microphone (optional) here.

  • Page 5: Scan Operating

    TK-390 OPERATING FEATURES 2) When one priority channel is set : Either priority channel 2. Scan Operating 1 or 2 is scanned. 2-1. Scan Types If a non-priority channel stops temporarily, a priority chan- • Single Group Scan nel signal is detected at certain intervals.

  • Page 6: Optional Features

    TK-390 OPERATING FEATURES 2-9. Temporarily Delete/Add 3-4. BCL (Busy Channel Lockout) Override It is possible to delete or add channel temporarily during You can transmit in spite of Busy Channel Lockout situa- scan. When scan stops on unnecessary channel for ex- tion.
  • Page 7 TK-390 OPERATING FEATURES 3-14. Mode (Enable/Disable) 4. Group Features The transceiver has many special modes mainly for main- You can use these features using the programming soft- tenance. ware (KPG-38D). · Self Programming mode · Panel Test mode 4-1. "TOT" (Time-Out Timer) ·...

  • Page 8: Key Functions

    TK-390 OPERATING FEATURES 5. Channel Features 6. Key Functions You can use these features using the programming soft- You can use these features, using the programming soft- ware (KPG-38D). ware (KPG-38D). Selector function is selectable channel se- lect or group select.
  • Page 9 TK-390 OPERATING FEATURES 6-7. Group Down Toggle PF Keys Speaker/ If this key is pressed once, the group number decreases Function Name Selector Switch Microphone by one step. If this key holds down for 500ms (approxi- PF Keys mate), the group number decreases continuously.
  • Page 10 TK-390 OPERATING FEATURES 6-14. Monitor 6-21. Squelch Level Monitor the channel before a transmission. The preset squelch level is varied in user mode (0 to 15). Press this key once, "MON" appears and unmutes Press the key programmed to "squelch level", the trans- speaker if a carrier is present, regardless of the specified ceiver enters to "squelch level adjust mode".
  • Page 11 DOS version 3.1 or later on an IBM-PC/XT, AT, or PS2 or Panel tuning mode compatible machine. The data can be input to or read from TK-390 and edited Clear function on the screen. The programmed or edited data can be printed out.

  • Page 12: Realignment

    TK-390 REALIGNMENT When enter the self programming mode, "FUNC" appears 3. Self Programming after "SEL" is displayed for half a second. Write mode for frequency data and signalling etc. Mainly Selecting any of Channel setting, Group setting, Function used by the person maintaining the user equipment.
  • Page 13 TK-390 REALIGNMENT 3-2. Channel Setting Mode • Note Set data for each channel while in this mode. After first 1. Different sample displays are shown. entering Self programming mode, select the "CHAN" display 2. Setting item No.s are displayed with a 7-segment 2-digit with [Top 1] [Top 2] and press [PTT] to set Channel Setting figure on the LCD.
  • Page 14 TK-390 REALIGNMENT 3-3. Group Setting Mode 3-4. Function Setting Mode Set data for each Group while in this mode. After first This mode allows making function settings for the trans- entering Self programming mode, select the "GROUP" dis- ceiver. After first entering Self programming mode, select play with [Top 1] [Top 2] and press [PTT] to set Group Set- "FUNC"...
  • Page 15 TK-390 REALIGNMENT • Flow Chart 3-5. Clone Mode 1. Connect the cloning interface cable between the master side transceiver (source) and slave side transceiver Self programming mode (clone) as shown in the figure. [Top 1] [Top 2] Function setting mode...
  • Page 16 6. Press the master side [PTT] to start cloning. and communications port in the Setup item. 4. Set the firmware to be updated by File select (=F1). 5. Held down the [Side 2] and [PTT]. Turn the TK-390 power [PTT] GRP 1S on, and release [Side 2] first.

  • Page 17: Circuit Description

    1. Overview The 1st IF signal is amplified (Q302) and fed into IC300 in The KENWOOD model TK-390 is a UHF/FM hand-held the FM IF IC. The IF signal is then mixed with the 2nd local transceiver designed to operate in the frequency range of oscillator frequency of 44.395MHz to generate the 2nd IF of...
  • Page 18 TK-390 CIRCUIT DESCRIPTION 3-4. Wide/Narrow changeover circuit 3-5. Audio amplifier circuit • TX-RX unit Narrow and Wide settings can be made for each channel by switching the MCF; XF300 (Wide), XF301 (Narrow) with The demodulated signal from IC300 goes through IC301,...
  • Page 19 TK-390 CIRCUIT DESCRIPTION 4-3. Drive and Final amplifier 4. Transmitter System The signal from the T/R switch (D7 is on) is amplified by 4-1. Microphone amplifier the pre-drive (Q6) and drive amplifier (Q8) to 20mW. The The signal from IC3 (control unit) goes through the mute output of the drive amplifier is amplified by the RF power switch (Q403).
  • Page 20 1 of the VCXO. The output of the VCXO is applied to pin 8 of the PLL IC. The VCO of TK-390 covers the 40MHz spread, setting 6. Power Supply Circuit frequencies in r1, r2 (receive) and t1, t2 (transmit) with a bias Battery +B is supplied via a 3A fuse from the battery ter- voltage applied to the –V terminal of the VCO.
  • Page 21 TK-390 CIRCUIT DESCRIPTION 7-4. D/A converter 7. Control Circuit IC3 and IC603 is used as a conventional semi-fixed-resis- The control unit consists of microprocessor IC406 and its tor converter. It sets the following : peripheral circuits. It controls the TX-RX unit and transfers 1) RX sensitivity data to and from the control unit.
  • Page 22 TK-390 CIRCUIT DESCRIPTION 7-6. Low battery warning 8-2. Decode • Low-speed data (QT, DQT) The battery voltage is monitored by the microprocessor (IC406). When the battery voltage falls below the voltage The demodulated signal from the FM IF IC (IC300) is am-...
  • Page 23 TK-390 CIRCUIT DESCRIPTION 9-1. Option port 1 (For ANI board etc.) 9. Option Board Terminal Name Function Note Terminals for mounting the option board are provided at DATI Data input Reference the bottom of the TX-RX unit. The table below shows the 1kHz STD Dev →...

  • Page 24: Semiconductor Data

    TK-390 SEMICONDUCTOR DATA 1. Microprocessor : MC-8800-802 (TX-RX Unit IC406) 1-1. Terminal function Pin No. Port name Function Pin No. Port name Function A7~A4 NC : Flash memory address bus DTMF clock AD5~AD3 NC : Flash memory address and data bus...
  • Page 25 TK-390 SEMICONDUCTOR DATA 2. D/A Converter : M62354GP (TX-RX Unit IC3) 2-1. Terminal connection 2-3. Terminal function Pin No. Symbol Function 12-bit shift register MSB bit data is output. When the LD is at the high level, the 12-bit shift register value is loaded to the D/A output register.
  • Page 26 TK-390 SEMICONDUCTOR DATA 4. DC-DC Converter : MAX865 (TX-RX Unit IC4) 4-2. Terminal description 4-1. Terminal connection Pin No. Name Function C1– Negative terminal of the flying boost capacitor. 3.3µF Positive terminal of the flying inverting capacitor. C1– C2– Negative terminal of the flying inverting capacitor.
  • Page 27 TK-390 SEMICONDUCTOR DATA / DESCRIPTION OF COMPONENTS 7. Active DBM : GN2011 6. VCO System : KCH41 (TX-RX Unit IC10) (TX-RX Unit IC200) 6-1. Circuit diagram 7-1. Circuit diagram –V TX/RX Control Unit (X53-3780-XX) -12 : K -13 : K4 Ref.

  • Page 28: Description Of Components

    TK-390 DESCRIPTION OF COMPONENTS TX-RX Unit (X57-5400-10) Ref. No. Use / Function Operation / Condition Ref. No. Use / Function Operation / Condition Level shift Q200 RF amplifier RX front 1st amplifier D/A converter (adjustment) Q201 RF amplifier RX front 2nd amplifier Outputs ±...
  • Page 29 TK-390 ∗ 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 30 TK-390 CONTROL UNIT (X53-3780-XX) TX-RX UNIT (X57-5400-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation R90-0723-05 MULTI-COMP 47K X 2 TX-RX UNIT (X57-5400-10) RK73GB1J273J CHIP R 1/16W RK73GB1J102J CHIP R 1.0K...
  • Page 31 TK-390 TX-RX UNIT (X57-5400-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation CC73GCH1H080D CHIP C 8.0PF C419 C92-0589-05 CHIP-TAN 47UF 6.3WV ∗ C93,94 CC73GCH1H100D CHIP C 10PF C420 C92-0702-05 ELECTRO 47UF 6.3WV...
  • Page 32 TK-390 TX-RX UNIT (X57-5400-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation ∗ C638 CK73GB1H272K CHIP C 2700PF L202 L40-8275-44 SMALL FIXED INDUCTOR (82.0NH) C639 CC73GCH1H090D CHIP C 9.0PF L203 L40-6875-44 SMALL FIXED INDUCTOR (68.0NH)
  • Page 33 TK-390 TX-RX UNIT (X57-5400-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation RK73GB1J220J CHIP R 1/16W R321 RK73GB1J102J CHIP R 1.0K 1/16W R44,45 RN73GH1J154D CHIP R 150K 1/16W R322 RK73GB1J272J CHIP R 2.7K...
  • Page 34 TK-390 TX-RX UNIT (X57-5400-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation R475-477 RK73GB1J101J CHIP R 1/16W R674 RK73GB1J104J CHIP R 100K 1/16W R481 R92-1252-05 CHIP R 0 OHM R675...
  • Page 35 TK-390 TX-RX UNIT (X57-5400-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation 2SC5110(O) TRANSISTOR DTC114EE DIGITAL TRANSISTOR 2SC4988 TRANSISTOR DTA144EE DIGITAL TRANSISTOR DTC144EE DIGITAL TRANSISTOR 2SK1824 Q200,201 3SK274 Q300 DTA144EE...

  • Page 36: Exploded View

    TK-390 EXPLODED VIEW X53 B/6 X53 F/6 X53 A/6 30x2 X53 C/6 : N14-0577-04 : N14-0578-04 M2.6 x8 BLK : N30-2608-45 M2 x 3 : N78-2030-46 M2 x 4 : N83-2004-46 M2.5 x 4 (Bi-Tap) : N89-2605-46 Parts with the exploded numbers larger than 700 are not supplied.

  • Page 37: Packing

    TK-390 PACKING 6 Dressing plate (B03-0594-04) 13 Instruction manual 7 Cap (Universal) (B62-0816-00) (B09-0363-03) 16 Stopper (D32-0421-24) 37 Protection bag (H25-0029-04) 62 Screw set (N99-2004-05) 46 Clip (J29-0652-05) 12 Warranty card (B46-0470-00) 36 Packing fixture (H12-3018-02) 38 Item carton case...

  • Page 38: Disassembly For Repair

    TK-390 DISASSEMBLY FOR REPAIR Disassembly of Front Case and Chassis Remove the Side Key Assy 1. Remove the 2 screws ( ) and a cap fixed screw ( 1. The side key assy is clips form a slide-hook structure. Lift 2.

  • Page 39: Adjustment

    TK-390 ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifications Standard Signal Generator Frequency Range Maximum 600MHz or more. (SSG) Modulation Frequency modulation and external modulation. Output –133dBm/0.05µV to 7dBm/501mV Power Meter Input Impedance 50Ω. Operation Frequency Up to 600MHz.
  • Page 40 ADJUSTMENT • Panel tuning Repair Jig (Chassis) Use jig (part No.: A10-1399-03) for repairing the TK-390 Place the TX-RX unit on the jig and fit it with 7 screws. Note : Supply power from an external power supply (Battery terminal : +, jig (chassis) : –)
  • Page 41 TK-390 ADJUSTMENT • Clear function Panel Test Mode Pressing [PTT] while holding down [Orange] in Panel test This mode is used for making transceiver connection mode, triggers the clear function which clears all transceiver tests and clearing the memory. data settings.
  • Page 42 TK-390 Common Section Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 0.1V 1. Varicap shift 1) Set panel tuning mode DC VTVM TX-RX TP2 Panel Top1/ –3V voltage Push Side2 to select Top2 ∗ ∗...
  • Page 43 TK-390 Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 4. TX high 1) Set panel test mode Power meter Panel Check 3.7W~5.2W power CH No. : 1 2.3A or less check Signalling No. : 1 Ammeter PTT : ON 2) CH No.
  • Page 44 TK-390 Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 50Hz 8. Maximum 1) Set panel test mode Power meter Panel Panel Top1/ 3.95kHz deviation CH No. : 3 Deviation Top2 (According to the adjustment Signalling No. : 1 meter larger +, –)
  • Page 45 TK-390 Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 0.05kHz 11. QT 1) Set panel tuning mode Power meter Panel Panel Top1/ 0.75kHz deviation CH No. : 3 Deviation Top2 adjustment Signalling No. : 1...
  • Page 46 TK-390 Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 50Hz 16. DTMF 1) Set panel tuning mode Power meter Panel Panel Top1/ 1.5kHz deviation CH No. : 3 Deviation Top2 adjustment Signalling No. : 1 meter ∗...
  • Page 47 TK-390 Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 22. BATT 1) Set panel test mode Power meter Panel Check Cannot transmit detection CH No. : 3 LED (TX) blinks check Signalling No. : 1 DC VTVM Bottom BATT BATT terminal voltage : 5.7V...
  • Page 48 TK-390 TK-390 ADJUSTMENT ADJUSTMENT Measurement Adjustment Measurement Adjustment Item Condition Specifications/Remarks Item Condition Specifications/Remarks Test- Test- Unit Terminal Unit Parts Method Unit Terminal Unit Parts Method equipment equipment 4. Sensitivity 1) Set panel test mode Panel Panel Top1/ Adjust for maximum 12dB SINAD or more 9.

  • Page 49: Pc Board Views

    TK-390 TK-390 PC BOARD VIEWS CONTROL UNIT (X53-3780-XX) (A/6) -10 : K -11 : K2 Component side view J72-0523-02 X53-378X-XX (A/6) CONTROL UNIT (X53-3780-XX) (A/6) -10 : K -11 : K2 Foil side view J72-0523-02 X53-378X-XX (A/6) PTTE...
  • Page 50 TK-390 PC BOARD VIEWS CONTROL UNIT (X53-3780-XX) (B~F/6) -10 : K -11 : K2 Component side view CONTROL UNIT (X53-3780-XX) (B~F/6) -10 : K -11 : K2 Foil side view TOGGLE IC101 R104 LAMP TXLED BLED J72-0523-02 R103 J72-0523-02 X53-378X-XX (B/6)
  • Page 51 TK-390 PC BOARD VIEWS TX-RX UNIT (X57-5400-10) Component side view X57-540X-XX Q405 C421 R450 C660 Q402 R411 C430 J72-0520-02 R677 C659 R405 C625 C411 Q401 R402 R669 R400 C416 C623 C435 R605 Q400 R621 C425 C414 R638 R472 C436 C413...
  • Page 52 TK-390 PC BOARD VIEWS TX-RX UNIT (X57-5390-10) Foil side view X57-540X-XX C311 R315 J72-0520-02 C331 Q302 C330 X300 R318 R317 C304 IC401 C481 R335 R429 C329 C433 C307 C302 R319 R220 C424 C315 C328 L300 C305 IC409 C247 IC407 CF302...

  • Page 53: Block Diagram

    TK-390 TK-390 BLOCK DIAGRAM...

  • Page 54: Level Diagram

    TK-390 TK-390 LEVEL DIAGRAM TERMINAL FUNCTION CN No. Pin No. Name I/O Function CN No. Pin No. Name I/O Function BTL input + for external speaker. TX-RX UNIT (X57-5400-10) SP– BTL input – for external speaker. CN400 CH D CH switch data.

  • Page 55: Knb-17A (Ni-Cd Battery)

    TK-390 TERMINAL FUNCTION / KNB-17A (Ni-Cd BATTERY) KNB-17A External VIew CN No. Pin No. Name I/O Function – Not use. Key scan IC clock data input. Key scan IC reset input. INAFC Internal speaker switch input. EXAFC External speaker switch input.

  • Page 56: Kmc-25/26 (Speaker Microphone)

    TK-390 KMC-25/26 (SPEAKER MICROPHONE) KMC-25 External View KMC-25/26 Circuit Diagram Universal SP/MIC connector EXT. ANT (KMC-26) SP– If the earphone jack output is too high, adjust the value of resistor R12. Earphone R12 0 jack ø3.5 2.2K 10µ Shield –...

  • Page 57: Antenna)

    TK-390 KSC-19 (CHARGER) / KSC-20 (RAPID CHARGER) / KPG-36 (PRO- GRAMMING INTERFACE CABLE) / KRA-15 (WHIP ANTENNA) KSC-19 External View KPG-36 External View KSC-19 Charging KNB-17A Voltage ..........7.2V Battery capacity ........1500mAh Charging time ........Approx. 8 hours KSC-20 External View...

  • Page 58: Specifications

    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.

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