Kenwood TK-2140 Service Manual
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Kenwood TK-2140 Service Manual

Kenwood TK-2140 Service Manual

Vhf fm transceiver
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VHF FM TRANSCEIVER
TK-2140
SERVICE MANUAL
Knob (PTT)
(K29-9131-03)
Key top
(SW1,SW2)
(K29-9132-03)
Does not come with antenna.
Antenna is available as an option.
GENERAL ................................................................................. 2
Antenna
(KRA-22:option)
SYSTEM SET-UP ..................................................................... 2
Knob (ENC)
OPERATING FEATURES ......................................................... 3
(K29-9134-03)
REALIGNMENT ........................................................................ 4
CIRCUIT DESCRIPTION .......................................................... 6
Knob (VOL)
(K29-9133-03)
SEMICONDUCTOR DATA ..................................................... 12
DESCRIPTION OF COMPONENTS ....................................... 13
PARTS LIST ............................................................................ 14
EXPLODED VIEW .................................................................. 21
PACKING ................................................................................ 22
ADJUSTMENT ........................................................................ 23
TERMINAL FUNCTION .......................................................... 32
SCHEMATIC DIAGRAM ......................................................... 43
BLOCK DIAGRAM .................................................................. 47
LEVEL DIAGRAM ................................................................... 49
KSC-25.................................................................................... 50
KNB-24L,KNB-25A,KNB-26N,KRA-22 .................................... 53
SPECIFICATIONS ............................................... BACK COVER
Cabinet assy
(A02-3653-04)
©
2001-10 PRINTED IN JAPAN
B51-8602-00 (S) 1022
CONTENTS
TX-RX UNIT (X57-6400-10) ................................................ 33

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  • Page 1: Table Of Contents

    VHF FM TRANSCEIVER TK-2140 SERVICE MANUAL © 2001-10 PRINTED IN JAPAN B51-8602-00 (S) 1022 CONTENTS GENERAL ................. 2 Antenna (KRA-22:option) SYSTEM SET-UP ..............2 Knob (ENC) OPERATING FEATURES ............3 (K29-9134-03) REALIGNMENT ................ 4 CIRCUIT DESCRIPTION ............6 Knob (VOL) (K29-9133-03) SEMICONDUCTOR DATA .............

  • Page 2: General

    Frequency range (MHz) RF power Type Choose the type of transceiver TX/RX 136~174 5.0W TK-2140 K A personal computer (IBM PC or compatible), programming Transceiver programming interface (KPG-36), and programming software (KPG-74D) are required for programming. (The frequency, trunked system features, conventional system features, TX power HI/LOW, and signalling data are programmed for the transceiver.)

  • Page 3: Operating Features

    1. Operation Features This red LED lights during transmission. If programmed by The TK-2140 is a VHF FM radio designed to operate in your dealer, when the battery pack power is low, the LED both trunking format and conventional format. The flashes during transmission.

  • Page 4: Realignment

    TK-2140 OPERATING FEATURES / REALIGNMENT REALIGNMENT i t c 1. Modes User mode Panel test mode Panel tuning mode l a i PC mode Data programming mode Firmware programming mode PC tuning mode PC test mode Clone mode Self programming...
  • Page 5 3. Set the firmware to be updated by file name item. blinking. 4. Turn the TK-2140 power ON with the [S] switch held down. When data receiving to transceiver, the green LED is blinking. When "PROG 57600" appears, release your finger from the switch.

  • Page 6: Circuit Description

    TK-2140 CIRCUIT DESCRIPTION 1. Overview adjusted by a variable capacitor. The input voltage to the variable capacitor is regulated by the voltage output from the This transceiver is VHF/FM portable transceiver designed D/A converter (IC307). The signal is amplified by RF amplifier to operate in the frequency range of 136 to 174MHz (K) and a (Q207), and passed through the bandpass filter (L210,213).
  • Page 7 TK-2140 CIRCUIT DESCRIPTION 3-4. Audio amplifier circuit Center Frequency Nominal 455kHz The demodulated signal from IC200 goes through the mute Min. 4.5kHz Band Width switch (Q204) and is amplified by IC300 (2/2), high-pass filtered, 40dB Max. 10.0kHz low-pass filtered, high-pass filtered, band-eliminate filtered, and...
  • Page 8 TK-2140 CIRCUIT DESCRIPTION The output signal from the summing amplifier passes 3-5. Squelch circuit through the D/A converter (IC307) again and goes to the VCO The output from IC200 enters FM IC again, then passed modulation input. through a band-pass filter. And passed through a band-pass The other output signal from the summing amplifier passes filter IC202 (2/2).
  • Page 9 8 of the PLL IC. 3) Sending frequency program data to the PLL. The TK-2140’s VCO consists of 2VCO and covers a dual 4) Controlling squelch on/off by the DC voltage from the range of the 180.85~218.85MHz and the 136~174MHz. The squelch circuit.
  • Page 10 TK-2140 CIRCUIT DESCRIPTION 7-2. Decode 7. Signalling Circuit Low-speed data (QT,DQT,LTR) 7-1. Encode The demodulated signal from the IF IC (IC200) is amplified Low-speed data (QT,DQT,LTR) by IC300 (2/2) and passes through a low-pass filter (IC306) to Low-speed data is output from pin 1 of the CPU. The signal remove audio components.
  • Page 11 TK-2140 CIRCUIT DESCRIPTION 8. Power Supply Circuit Battery +B is supplied via a 3A fuse from the battery terminal connected to the TX-RX unit. After passing through the power switch, power supply (SB) is applied to the three AVRs. IC401 supplies 5V (5M) to the control circuit, and IC403 supplies 5V (5C) to common circuits.

  • Page 12: Semiconductor Data

    TK-2140 SEMICONDUCTOR DATA Microprocesser : 30620M8A-XXXGP (TX-RX UNIT : IC309) Pin function Port Port Function Function Name Name LSDO Low speed data output. (QT/DQT/LTR) HSDO High speed data output. (DTMF) Flash memory address bus. HSDI High speed data input. (2Tone) GND.

  • Page 13: Description Of Components

    TK-2140 DESCRIPTION OF COMPONENTS TX-RX UNIT (X57-6400-10) Ref. No. Use/Function Operation/Condition Ref. No. Use/Function Operation/Condition MOS IC PLL IC Q307 Int/Ext Switch IC100 MOS IC APC AMP Q308 Int/Ext Switch IC200 MOS IC IF IC Q309 TRANSISTOR BUSY LED switch...

  • Page 14: Parts List

    TK-2140 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 (X57-6400-10) TK-2140 Address Parts No.
  • Page 15 TK-2140 PARTS LIST TX-RX UNIT (X57-6400-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C92-0001-05 CHIP-C 0.1UF 35WV C216 CK73HB1A104K CHIP C 0.10UF C92-0714-05 CHIP-TAN 4.7UF 6.3WV C217 CK73HB1H221K CHIP C 220PF...
  • Page 16 TK-2140 PARTS LIST TX-RX UNIT (X57-6400-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C300 C92-0713-05 CHIP-TAN 10UF 6.3WV C391,392 CK73HB1C103K CHIP C 0.010UF K C301 CK73HB1H102K CHIP C 1000PF C394-398 CK73HB1A104K CHIP C 0.10UF...
  • Page 17 TK-2140 PARTS LIST TX-RX UNIT (X57-6400-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts CN300 E40-6178-05 PIN ASSY SOCKET L400 L92-0149-05 FERRITE CHIP CN301,302 E40-5856-05 FLAT CABLE CONNECTOR L500 L92-0163-05 BEADS CORE...
  • Page 18 TK-2140 PARTS LIST TX-RX UNIT (X57-6400-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts R111 RK73HB1J180J CHIP R J 1/16W R238 R92-1368-05 CHIP R 0 OHM R112 RK73HB1J331J CHIP R J 1/16W...
  • Page 19 TK-2140 PARTS LIST TX-RX UNIT (X57-6400-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts R336-338 RK73HB1J223J CHIP R J 1/16W R410,411 R92-1368-05 CHIP R 0 OHM R339-341 RK73HB1J103J CHIP R J 1/16W...
  • Page 20 TK-2140 PARTS LIST TX-RX UNIT (X57-6400-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts D9,10 HVC375B VARIABLE CAPACITANCE DIODE Q107 2SK1824 D100,101 HSC277 DIODE Q108 DTA144EE DIGITAL TRANSISTOR D102-105 HVC131 DIODE Q201...

  • Page 21: Exploded View

    TK-2140 EXPLODED VIEW TX-RX UNIT(A/3) SUB PCB Parts with the exploded numbers larger than 700 are not supplied.

  • Page 22: Packing

    TK-2140 PACKING 45 Item carton case (H52-1811-02) 10 Instruction manual (B62-1476-10) 53 Belt hook (J29-0688-05) A Dressed screw accessory (N08-0548-04) 7 Cap (B09-0625-03) Parts with the exploded numbers larger than 700 are not supplied.

  • Page 23: Adjustment

    TK-2140 ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifications Standard Signal Generator Frequency Range 136 to 174MHz (SSG) Modulation Frequency modulation and external modulation. Output -127dBm/0.1 V to greater than -47dBm/1mV Power Meter Input Impedance 50 . Operation Frequency 136 to 174MHz or more.
  • Page 24 TK-2140 ADJUSTMENT • Panel tuning Removing the front panel After removing the battery pack, knobs, and antenna, remove the 2 screws from the back of the transceiver. Lift the chassis away from the bottom part gently, then pull out the chassis as shown below.
  • Page 25 How to assemble the antenna connector and its Repair Jig (Chassis) terminal. Use jig (part No.: A10-4060-04) for repairing the TK-2140. The antenna connector and its terminal are supplied as Place to TX-RX unit on the jig and fit it with screws.

  • Page 26: Test Mode

    TK-2140 ADJUSTMENT Frequency and signalling Test Mode The set has been adjusted for the frequencies shown in the Test mode operating features following table. When required. re-adjust them following the This transceiver has a test mode. To enter test mode, press adjustment procedure to obtain the frequencies you want in [A] key and turn power on.
  • Page 27 TK-2140 ADJUSTMENT LCD display (Test mode) LCD display (Tuning mode) channel No. Signalling No. FREQ Adjustment item Adjustment value (1~256) Panel Tuning Mode frequency table Press [S], now in tuning mode. Use [2 B] button to write TEST Ch RX frequency (MHz)
  • Page 28 TK-2140 ADJUSTMENT Common Section Measurement Adjustment Specifications/ Item Condition Remark Test equipment Unit Terminal Unit Parts Method 1. Setting 1) BATT terminal voltage:7.5V 2) SSG Standard modulation [Wide] MOD:1kHz, DEV:3kHz [Narrow] MOD:1kHz, DEV:1.5kHz 2. VCO lock [Panel Test Mode] voltage...
  • Page 29 TK-2140 ADJUSTMENT Measurement Adjustment Specifications/ Item Condition Remark Test equipment Unit Terminal Unit Parts Method 6. DQT Balance 1) Adj item [BAL] Power meter Panel Panel Encoder Make the Adjust Adjust [ Dev meter universal knob demodulation [Wide] LPF:3kHz Oscilloscope...
  • Page 30 TK-2140 ADJUSTMENT Measurement Adjustment Specifications/ Item Condition Remark Test equipment Unit Terminal Unit Parts Method 11.LTR 1) Adj item [FLTR] Power meter Panel Panel Encoder 1.0kHz 0.1kHz Deviation Adjust [ Dev meter universal knob Adjust LPF:3kHz Oscilloscope connector HPF:OFF [Wide]...
  • Page 31 TK-2140 ADJUSTMENT Receiver Section Measurement Adjustment Specifications/ Item Condition Remark Test equipment Unit Terminal Unit Parts Method 1. Sensitivity 1) Adj item [SENS] Panel Panel Encoder Adjust for 12dB SINAD or Adjust Adjust [ AF VTVM Universal knob maximam more.

  • Page 32: Terminal Function

    TK-2140 ADJUSTMENT / TERMINAL FUNCTION Adjustment points TX-RX unit (X57-6400-10) component side view X57-6400-10 Foil side view CN No. Pin No. Name I/O Function CN No. Pin No. Name I/O Function TX-RX UNIT (X57-6400-10): TX-RX section CN400 S_DET Battery detect input...

  • Page 33: Pc Board Views

    TK-2140 PC BOARD VIEW TX-RX UNIT (X57-6400-10) Component Side View J72-0806-09 CN500 MMUTE MICI 5CNS AFSTB C555 AFREG1 AFREG2 TXHSD AFDET TXAF AFMSKE RXAFI AFTRD AFRTM HSDIN AFRDT C554 RXAFO AFCLR XOUT C501 C502 R501 C503 R502 C504 Component side...
  • Page 34 TK-2140 PC BOARD VIEW TX-RX UNIT (X57-6400-10) Foil Side View TX-RX UNIT (X57-6400-10) X500 J72-0806-09 R515 C519 C515 C536 CP500 CP501 C557 R519 R528 C556 R523 R529 R525 C527 IC500 C528 C543 C530 C529 C506 R500 C526 C521 R509 Q500...
  • Page 35 TK-2140 PC BOARD VIEW TX-RX UNIT (X57-6400-10) Component Side View + Foil Side View TX-RX UNIT (X57-6400-10) X500 J72-0806-09 C515 C519 R515 C536 CN500 CP501 CP500 C557 R519 R528 C556 R523 MMUTE MICI 5CNS AFSTB C555 AFREG1 R529 AFREG2 TXHSD...
  • Page 36 TK-2140 PC BOARD VIEW TX-RX UNIT (X57-6400-10) Component Side View TX-RX UNIT (X57-6400-10) L314 L315 CN305 C375 R388 D302 L311 IC312 IC311 – C349 C362 R319 C352 R371 C354 C364 R316 R381 C371 C313 Q305 R380 Q307 C389 R364 L309...
  • Page 37 TK-2140 PC BOARD VIEW TX-RX UNIT (X57-6400-10) Foil Side View TX-RX UNIT (X57-6400-10) C329 X200 L220 R276 R238 R275 CF200 C212 C295 L223 R232 L201 XF202 R226 R233 R253 C242 L210 R208 C225 C239 C230 IC200 C290 C241 R326 C281...
  • Page 38 TK-2140 PC BOARD VIEW 30620M8A-2N3GP XC61CN5002NR LC73872M TA31136FN TDA7053AT TA75W01FU TC75W51FU TX-RX UNIT (X57-6400-10) Component Side View + Foil Side View TX-RX UNIT (X57-6400-10) L314 C329 L315 X200 CN305 C375 R388 D302 L311 R275 IC312 IC311 L220 – C349 R238...

  • Page 39: Schematic Diagram

    TK-2140 SCHEMATIC DIAGRAM Note : Component marked with a dot ( ) are parts of pattern1.

  • Page 40: Block Diagram

    TK-2140 TK-2140 BLOCK DIAGRAM...

  • Page 41: Level Diagram

    TK-2140 TK-2140 LEVEL DIAGRAM KSC-25 KSC-25 Power on (LED : off) Circuit Description Initialization Charger Flow chart output terminals Abnormal Red LED flash reset? shorted? No (LED : off) LED color : Red LED color : Red Battery insert (LED color : Red)

  • Page 42: Ksc-25

    TK-2140 KSC-25 KSC-25 PC BOARD VIEWS CHARGER UNIT (W02-3641-08) Component side view JK10 CHARGER UNIT (W02-3641-08) Foil side view...
  • Page 43 TK-2140 KSC-25 KSC-25 Schematic Diagram 102P 102P 7.15K 104P 102P 7.15K 4.3K 104P 101P 102P 100K 103P 104P 100K 1.5K 104P 200K 104P 102P 100K 102P 100K 8.2K 102P 4.7K 104P 6MHZ 102P 102P 102P 102P 102P 102P...

  • Page 44: Knb-24L,Knb-25A,Knb-26N,Kra-22

    TK-2140 KSC-25 / KNB-24L / KNB-25A / KNB-26N / KRA-22 KSC-25 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.

  • Page 45: 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...

This manual is also suitable for:

Tk-2140 3140Tk-3140

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