Kenwood TH-K40A Service Manual
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Kenwood TH-K40A Service Manual

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430MHz FM TRANSCEIVER
TH-K40A/K40E
SERVICE MANUAL
Helical antenna
(T90-1019-35)
Knob (Volume)
(K29-9503-03)
T
his product complies with the RoHS directive for the European market.
Knob(Encoder)
(K29-9504-03)
Key top (16 keys)
(K29-9502-02)
Plastic cabinet assy
(A02-4159-03)
© 2009-1 PRINTED IN JAPAN
© 2012-3 PRINTED IN JAPAN
B51-8281-00 ( N ) 1219
B53-7017-00 ( Y ) 70
When performing the TH-K40 adjustment, a personal
computer, programming interface and tuning software are
required.
CONTENTS
DISASSEMBLY FOR REPAIR .....................2
CLONE MODE .............................................3
CIRCUIT DESCRIPTION .............................4
SEMICONDUCTOR DATA ...........................7
COMPONENTS DESCRIPTION ..................9
PARTS LIST ...............................................10
EXPLODED VIEW ......................................16
PACKING ...................................................17
ADJUSTMENT ...........................................18
TX-RX UNIT (X57-822X-XX) ...................22
SCHEMATIC DIAGRAM ............................26
BLOCK DIAGRAM .....................................30
LEVEL DIAGRAM ......................................32
BT-16 (Battery Case) .............................33
SPECIFICATIONS ......................................35
This product uses Lead Free solder
.

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  • Page 1: Table Of Contents

    430MHz FM TRANSCEIVER TH-K40A/K40E SERVICE MANUAL © 2009-1 PRINTED IN JAPAN © 2012-3 PRINTED IN JAPAN B51-8281-00 ( N ) 1219 B53-7017-00 ( Y ) 70 When performing the TH-K40 adjustment, a personal computer, programming interface and tuning software are required.

  • Page 2: Disassembly For Repair

    Copyright 2012 by JVC KENWOOD Corporation. All While every precaution has been taken in the preparation rights reserved. of this manual, JVC KENWOOD Corporation assumes no No part of this manual may be reproduced, translated, responsibility for errors or omissions. Neither is any liability...

  • Page 3: Clone Mode

    TH-K40A/K40E DISASSEMBLY FOR REPAIR 3. Removing the Rear Panel 1. Raise the rear panel on the chassis ( k ). Antenna terminal CLONE MODE Programming data can be transferred from one trans- Note: ceiver to another by connecting them via their SP/MIC con- •...

  • Page 4: Circuit Description

    TH-K40A/K40E CIRCUIT DESCRIPTION 1. Frequency Confi guration The PLL circuit in the transmitter generates the neces- sary frequencies. The receiver utilizes double conversion. The first IF is 38.85MHz and the second IF is 450kHz. The fi rst Local os- cillator is supplied from the PLL circuit.
  • Page 5 TH-K40A/K40E CIRCUIT DESCRIPTION 2-3. IF Amplifi er Circuit 3. Transmitter System The fi rst IF signal is passed through a four-pole mono- 3-1. Microphone Amplifi er Circuit lithic crystal fi lter (XF200) to remove the adjacent channel The signal from microphone amplifi ed by IC301 and goes signal.
  • Page 6 TH-K40A/K40E CIRCUIT DESCRIPTION 4. Frequency Synthesizer Circuit Realign the transceiver after replacing the EEPROM. 4-1. Frequency Synthesizer The frequency synthesizer consists of the TCXO (X1), 6. Signaling Circuit VCO, PLL IC (IC1) and buffer amplifi ers. 6-1. Encode The TCXO generates 19.2MHz. The frequency stability is 5.0 ppm within the temperature range of –30 to +60°C.

  • Page 7: Semiconductor Data

    TH-K40A/K40E SEMICONDUCTOR DATA MCU: R5F2L3ACCKEKA (TX-RX unit IC401) Pin No. Port Name Function [MONI] key switch input Pin No. Port Name Function MONI L: Active KEYIT Type detection Common serial clock output KEYIS Type detection DATA Common serial data output...
  • Page 8 TH-K40A/K40E SEMICONDUCTOR DATA PLL IC: MB15E03SL-E1 (TX-RX unit IC1) D/A Converter IC: R2A20178NP (TX-RX unit IC300) Pin No. Port Name Function Programmable reference divider Pin No. Port Name Function OSCIN input Vin2 FROM AF fi lter signal input OSCOUT Oscillator output Power supply voltage (5.0V)

  • Page 9: Components Description

    TH-K40A/K40E COMPONENTS DESCRIPTION TX-RX unit (X57-822X-XX) Ref. No. Use/Function Operation/Condition/Compatibility Power supply Ref. No. Use/Function Operation/Condition/Compatibility Q304 Active ON (5MSC: L) (5MS) switch PLL system Frequency control Speaker mute Q305 for AF signal line Active ON 2nd mixer, IF amplifi er, FM...

  • Page 10: Parts List

    TH-K40A/K40E PARTS LIST 2 2 0 CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc. 5 = Value 101 = 100pF Multiplier 3 = Temp.
  • Page 11 0.10UF C101 CC73HCH1H100B CHIP C 10PF C102 CC73HCH1H220J CHIP C 22PF C103 CC73HCH1H020C CHIP C 2.0PF M: TH-K40A(M) If a part reference number is listed in a shaded box, that part does not come with the PCB. E : TH-K40E(E)
  • Page 12 CK73HB1H822K CHIP C 8200PF C229 CC73HCH1H050B CHIP C 5.0PF C334 CK73HB1C273K CHIP C 0.027UF K C230 CC73HCH1H1R5B CHIP C 1.5PF C335 CC73HCH1H271J CHIP C 270PF C231 CC73HCH1H030B CHIP C 3.0PF C336 CK73HB1H821K CHIP C 820PF M: TH-K40A(M) E : TH-K40E(E)
  • Page 13 CHIP R 1.0K 1/16W RK73GB2A473J CHIP R 1/10W J300 E11-0484-05 3.5D PHONE JACK(3.5D/MIC) RK73HB1J000J CHIP R 1/16W M: TH-K40A(M) If a part reference number is listed in a shaded box, that part does not come with the PCB. E : TH-K40E(E)
  • Page 14 CHIP R 1/16W R218 RK73HB1J102J CHIP R 1.0K 1/16W R353 RK73HB1J103J CHIP R 1/16W R220 RK73HB1J561J CHIP R 1/16W R354 RK73HB1J102J CHIP R 1.0K 1/16W R221 RK73HB1J000J CHIP R 1/16W R355 RK73HB1J471J CHIP R 1/16W M: TH-K40A(M) E : TH-K40E(E)
  • Page 15 S70-0414-05 TACT SWITCH(PTT) S419 W02-3766-05 ENCODER MIC300 T91-0673-05 MIC ELEMENT D1 ,2 1SV325F VARIABLE CAPACITANCE DIODE M: TH-K40A(M) If a part reference number is listed in a shaded box, that part does not come with the PCB. E : TH-K40E(E)

  • Page 16: Exploded View

    TH-K40A/K40E EXPLODED VIEW Cx13 S418 MIC300 J301 J300 VR300 TX-RX unit S419 A : N09-2438-05 B : N80-2606-43 C : N83-2005-48 Parts with the exploded numbers larger than 700 are not supplied. If a part reference number is listed in a box on the exploded view of the PCB, that part does not come with the PCB.

  • Page 17: Packing

    (B62-2374-00) : E 58 AC ADAPTER (W08-1246-25) 56 HELICAL ANTENNA (T90-1019-35) 61 CHARGER (W08-1249-35) 714 PACKING FIXTURE 42 Belt clip (J29-0756-05) 711 ITEM CARTON CASE M: TH-K40A(M) E: TH-K40E(E) Parts with the exploded numbers larger than 700 are not supplied.

  • Page 18: Adjustment

    TH-K40A/K40E ADJUSTMENT Note: Required Test Equipment • When performing the TH-K40 adjustment, a personal 1. Stabilized Power Supply computer, programming interface cable (PG-4Y, KPG- 1) The supply voltage can be changed between 3V and 16V 22A/22U), tuning cable (E30-3216-05) and tuning software and the current is 3A or more.
  • Page 19 TH-K40A/K40E ADJUSTMENT Frequency and Signaling Preparations for Tuning the Transceiver The transceiver has been adjusted for the frequencies Before attempting to tune the transceiver, connect the shown in the following table. When required, re-adjust them unit to a suitable power supply.
  • Page 20 TH-K40A/K40E ADJUSTMENT Common Section Measurement Adjustment Item Condition Specifi cations / Remarks Test- Unit Terminal Unit Parts Method equipment 1. Setting 1) BATT terminal voltage: 7.5V 2) SSG standard modulation [Wide] MOD: 1kHz, DEV: 3kHz [Narrow] MOD: 1kHz, DEV: 1.5kHz 2.
  • Page 21 TH-K40A/K40E ADJUSTMENT Measurement Adjustment Item Condition Specifi cations / Remarks Test- Unit Terminal Unit Parts Method equipment 7. Battery 1) BATT terminal voltage: 7.1V Power TX-RX ANT Check Segment display: 4 dots Detection PTT: ON meter BATT Check TX Power: Low...

  • Page 22: Pc Board

    TH-K40A/K40E PC BOARD TX-RX UNIT (X57-822X-XX) 0-20: M 2-71: E Component side view (J79-0326-09) J79-0326-09 D415 D419 D418 D416 D421 D420 C408 C438 R458 R449 R450 D422 D423 C412 C411 25 26 D417 R425 R447 C415 CN304 CN303 CN402 D425...
  • Page 23 TH-K40A/K40E PC BOARD TX-RX UNIT (X57-822X-XX) 0-20: M 2-71: E Component side view (J79-0326-09) D415 R443 C372 MIC300 C383 R379 CN311 IC307 C344 C421 IC308 Q306 D304 C352 C367 D302 C358 R378 C360 R367 IC306 Q300 R357 C305 C371 R336...
  • Page 24 TH-K40A/K40E PC BOARD TX-RX UNIT (X57-822X-XX) 0-20: M 2-71: E Foil side view (J79-0326-09) S417 S418 MONI C139 C137 C141 C157 C138 L107 C134 L109 C136 C263 L112 D103 L213 L113 C262 D203 C261 C260 R243 C154 R242 R319 D202...
  • Page 25 TH-K40A/K40E PC BOARD TX-RX UNIT (X57-822X-XX) 0-20: M 2-71: E Foil side view (J79-0326-09) C108 C105 R107 R444 L104 C148 C147 C111 R103 C113 R101 C101 R111 C102 C109 C112 C118 R115 C100 C115 C382 Q103 C150 C155 Q307 C162...

  • Page 26: Schematic Diagram

    TH-K40A/K40E SCHEMATIC DIAGRAM TX-RX UNIT(X57-822X-XX) R431 X57-822X-XX D408 R431 R432 D409 R432 0-20 DA2S101 2-71 DA2S101 5MSC D404 KEYO4 S401 S402 S403 S404 1SS388F D412 D408 D4 05 DA2S101 KEYO3 INPTT S405 S406 S407 S408 1SS388F D409 D40 6 KEYO2...
  • Page 27 TH-K40A/K40E SCHEMATIC DIAGRAM TX-RX UNIT (X57-822X-XX) SHIFT SHIFT SHIFT CURRENT CURRENT CURRENT THERM CV_DET LSDI DCSW VOL_CS DATA 5MSC THERM DCSW SEG15 SEG15 SEG14 VOL_CS SEG14 R331 SEG13 DCSW CV_DET SEG13 SEG12 CURRENT SEG12 SEG11 SEG11 PLLPS SEG10 SEG10 R332...
  • Page 28 TH-K40A/K40E SCHEMATIC DIAGRAM TX-RX UNIT (X57-822X-XX) D1,2 1.80V FREQUENCY RF SWITCH FREQUENCY 0.70V MODULATOR RF AMP CONTROL CONTROL SHIFT HSC277 270n 120p 0.5p 1SV325F CURRENT R:1.03V 2SC5108(Y)F T:1.74V 2SC5636 MCH3914(7)-H RF BUFFER RXLO HSC277 D7,8 TX/RX SW C 2 3 270p R:4.88V...
  • Page 29 TH-K40A/K40E SCHEMATIC DIAGRAM TX-RX UNIT (X57-822X-XX) L107 D101 L109 L110 FINAL HVC131 Q103 Strip Line DRIVE C163 C136 C134 D102 C138 C140 RD07MUS2BT112 Q102 180p 180p C113 R116 HVC131 RFM01U7P RXLO 220p C107 L104 Hi:1.06V Mid:0.64V Lo:0.59V Temp compensation R: 0V D101,102,103,104 T:0.81V...

  • Page 30: Block Diagram

    TH-K40A/K40E BLOCK DIAGRAM TX-RX ユニット (X57-822X-XX ) D426 B30-1782-05 MB15A02PFV2E1 PLPS BUSY DCSW LEDG PLLE LTC014EEBFS8 PLL SYSTEM (GRN) Q403 MCH3914(7)-H PLLD LTC014EEBFS8 INVERT D1,D2 1SV325F D427 3.3V B30-1779-05 LOOP FILTER DCSW LEDR HVC350B TCXO 2SC5383-T111 19.2MHz (RED) Q404 LTC014EEBFS8 LTC014EEBFS8 L77-1944-05 SHIFT ASSIST CONV.
  • Page 31 TH-K40A/K40E BLOCK DIAGRAM RX: 400.000~469.995MHz (M,E) TX: 400.000~469.995MHz (M) 430.000~439.995MHz (E) Q102 Q103 D101,D102,D103,D104 D7,D8 Q101 2SC5108(Y)F RFM01U7P RD07MUS2BT112 HVC131 2SC5636 HSC277 2SC4926YD TX/RX FINAL DRIVE BUFF ANT SW DRIVE F101 0.5A TH101 RIPPLE 2SC5383-T111 CURRENT FILTER THREM IC300(8/8) DA2S101...

  • Page 32: Level Diagram

    TH-K40A/K40E LEVEL DIAGRAM...

  • Page 33: Optional Accessories

    TH-K40A/K40E OPTIONAL ACCESSORIES BT-16 (Battery Case (6AAA/LR03)) KNB-65L (Li-ion Battery Pack) ■ External View ■ External View ■ Specifi cations Voltage ................7.4V Battery capacity ..........typ 1520mAh min 1460mAh EMC-11 (Clip Microphone with Earphone) KVC-22 (DC Vehicular Chager Adapter) ■...
  • Page 34 TH-K40A/K40E MEMO...

  • Page 35: Specifications

    TH-K40A/K40E SPECIFICATIONS General Guaranteed range (MHz) TX & RX 430 ~ 440 400 ~ 470 (M) / 430 ~ 440 (E) Operation Frequency range (MHz) 400 ~ 470 Mode F3E, F2D Antenna impedance 50 Operating temperature range –20°C ~ +60°C Operating Voltage DC 6.0 ~ 9.0V (7.4V nominal)
  • Page 36 TH-K40A/K40E...
  • Page 37 TH-K40A/K40E TH-K40A/K40E PC BOARD PC BOARD TX-RX UNIT (X57-822X-XX) 0-20: M 2-71: E TX-RX UNIT (X57-822X-XX) 0-20: M 2-71: E Component side view (J79-0326-09) Component side view (J79-0326-09) J79-0326-09 D415 R443 D419 D418 C372 MIC300 C383 R379 CN311 IC307 C344...
  • Page 38 TH-K40A/K40E TH-K40A/K40E PC BOARD PC BOARD TX-RX UNIT (X57-822X-XX) 0-20: M 2-71: E TX-RX UNIT (X57-822X-XX) 0-20: M 2-71: E Foil side view (J79-0326-09) Foil side view (J79-0326-09) S417 S418 MONI C108 C105 R107 R444 L104 C148 C147 C111 R103...
  • Page 39 TX-RX UNIT(X57-822X-XX) D1,2 1.80V FREQUENCY RF SWITCH FREQUENCY MODULATOR 0.70V RF AMP L107 D101 L109 L110 FINAL CONTROL CONTROL SHIFT SHIFT SHIFT SHIFT HVC131 R431 Q103 Strip Line 270n HSC277 DRIVE RD07MUS2BT112 C163 C134 D102 C136 C138 C140 X57-822X-XX D408 D409 R431 R432...
  • Page 40 TX-RX ユニット (X57-822X-XX ) RX: 400.000~469.995MHz (M,E) TX: 400.000~469.995MHz (M) 430.000~439.995MHz (E) D426 B30-1782-05 MB15A02PFV2E1 PLPS BUSY DCSW LEDG PLLE LTC014EEBFS8 PLL SYSTEM (GRN) Q403 MCH3914(7)-H LTC014EEBFS8 PLLD INVERT Q102 Q103 D1,D2 D101,D102,D103,D104 D7,D8 Q101 2SC5108(Y)F RFM01U7P RD07MUS2BT112 HVC131 1SV325F 2SC5636 HSC277 2SC4926YD D427 3.3V B30-1779-05...

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