Kenwood TK-7302 Service Manual
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Kenwood TK-7302 Service Manual

Vhf fm transceiver
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See also: Instruction Manual
VHF FM TRANSCEIVER
TK-7302/7302
TK-7302H/7302H
CONNECTION CABLE
KCT-60
SERVICE MANUAL
Modular jack
(E58-0535-05)
GENERAL .....................................................2
SYSTEM SET-UP .........................................4
REALIGNMENT ...........................................4
INSTALLATION ............................................6
DISASSEMBLY FOR REPAIR ......................8
CIRCUIT DESCRIPTION ............................10
SEMICONDUCTOR DATA .........................15
COMPONENTS DESCRIPTION .................16
PARTS LIST ...............................................17
EXPLODED VIEW ......................................26
PACKING ....................................................27
RoHS
This product complies with the
V
(
)
Key top
(K29-9448-01)
CONTENTS
directive for the European market.
V
(
)
© 2009-9 PRINTED IN JA PAN
B51-8886-00 ( N ) 000
Panel assy
(A62-1171-03)
ADJUSTMENT ..........................................28
TERMINAL FUNCTION .............................34
DISPLAY UNIT (X54-3670-20) ...............36
TX-RX UNIT (X57-7680-XX) ..................38
SCHEMATIC DIAGRAM ............................42
BLOCK DIAGRAM .....................................48
LEVEL DIAGRAM ......................................50
SPECIFICATIONS ...................BACK COVER
Badge
(B43-1629-04)
This product uses Lead Free solder.

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  • Page 1: Table Of Contents

    VHF FM TRANSCEIVER TK-7302/7302 TK-7302H/7302H CONNECTION CABLE KCT-60 SERVICE MANUAL © 2009-9 PRINTED IN JA PAN B51-8886-00 ( N ) 000 Modular jack Key top Panel assy Badge (E58-0535-05) (K29-9448-01) (A62-1171-03) (B43-1629-04) CONTENTS GENERAL .............2 ADJUSTMENT ..........28 SYSTEM SET-UP .........4 TERMINAL FUNCTION ......34...

  • Page 2: General

    Kenwood reserves the right to make changes to any wise, for any purpose without the prior written permission products herein at any time for improvement purposes.
  • Page 3 Plan cable runs for protection against pinching or crush- Your KENWOOD dealer can help you select an antenna sys- ing wiring, and radio installation to prevent overheating. tem that will best serve your particular needs.

  • Page 4: System Set-Up

    /7302H/7302H SYSTEM SET-UP Merchandise received Frequency range (MHz) RF power Type License and frequency allocated by FCC 136~174 TK-7302/7302(V) M/K TK-7302H K,M 136~174 Choose the type of transceiver 136~174 TK-7302H(V) K See page 4. Transceiver programming A personal computer, programming interface (KPG-46/46A), and programming software (KPG-124D) are required for programming.

  • Page 5: Clone Mode

    TK-7302/7302 /7302H/7302H REALIGNMENT Note: • You must install the KCT-53U driver in the computer to KPG-46 or KPG-46A or use the USB adapter (KCT-53U). KPG-46A + KCT-53U + Tuning cable • When using the USB adapter (KCT-53U) for the fi rst time,...

  • Page 6: Installation

    TK-7302/7302 /7302H/7302H REALIGNMENT 4-1. Adding the data password. 4-2. Flow chart (Source transceiver) If the data password is set in the optional feature menu, Press [ ] key + Power ON for 2 seconds you must enter the password (Master transceiver) to acti- vate a clone mode.
  • Page 7 TK-7302/7302 /7302H/7302H INSTALLATION 2. Ignition Sense Cable (KCT-18: Option) 3. External Speaker (Option) The KCT-18 is an optional cable for enabling the ignition 3-1. KES-3 function. The ignition function lets you turn the power to the The KES-3 is an external speaker for the 3.5-mm-diameter transceiver on and off with the car ignition key.

  • Page 8: Disassembly For Repair

    TK-7302/7302 /7302H/7302H DISASSEMBLY FOR REPAIR 4. To remove the speaker holder, first remove the two 1. Disassembly Procedure screws from the display PCB using a phillips screwdriver. 1. When removing the cabinet, fi rst remove the two screws Then, insert a fl at-head screwdriver under the tabs of the from the right and left with a phillips screwdriver.
  • Page 9 TK-7302/7302 /7302H/7302H DISASSEMBLY FOR REPAIR 6. Pull it out behind the chassis by rotating the bush (e) 2. When mounting the panel assembly, pass the fl at cable of the DC cord 90 degrees in the direction of the arrow...

  • Page 10: Circuit Description

    TK-7302/7302 /7302H/7302H CIRCUIT DESCRIPTION 1. Frequency Confi guration Item Rating Nominal center frequency 38.85MHz The receiver utilizes double conversion. The first IF is 38.85MHz and the second IF is 450kHz. The fi rst local oscil- Pass bandwidth ±6.0kHz or more at 3dB lator signal is supplied from the PLL circuit.
  • Page 11 TK-7302/7302 /7302H/7302H CIRCUIT DESCRIPTION 2-4. Wide/Narrow Switching Circuit The electric fi eld strength of the receive signal can be known before the SQIN voltage is input to the MCU, and The Wide port (pin 99) and Narrow port (pin 98) of the the scan stop speed is improved.
  • Page 12 TK-7302/7302 /7302H/7302H CIRCUIT DESCRIPTION through a low-pass fi lter and passed to the VCO to control 4. PLL Frequency Synthesizer the oscillator frequency. The PLL circuit generates the fi rst local oscillator signal for reception and the RF signal for transmission.
  • Page 13 5-3. Key Matrix Circuit ■ Low-speed data (QT, DQT) The TK-7302 front panel has function keys. Each of them The demodulated signal from the FM IC (IC500) will input is connected to a cross point of a matrix of the KMI1 to to the baseband IC (IC701) to remove frequencies of 300Hz KMO3 ports of the MCU.
  • Page 14 TK-7302/7302 /7302H/7302H CIRCUIT DESCRIPTION ■ High-speed data (2-tone) 7. Power Supply Circuit The demodulated signal from the FM IC (IC500) is am- When the power switch on the display unit is pressed, plifi ed by the baseband IC and passes through a high-pass the power port on the display unit which is connected to fi...

  • Page 15: Semiconductor Data

    Voice/Beep/5-tone output for modu- 3C control HSDO lation PLPS Sleep mode function for PLL IC LEDO LED data KSSW Kenwood sound switch LECE LED enable AMP SW AF AMP (L: enable / H: disable) LECL LED clock EEPWP EEPROM write protect...

  • Page 16: Components Description

    TK-7302/7302 /7302H/7302H CONPONENTS DESCRIPTION Display unit (X54-3670-20) Ref. No. Part Name Description Ref. No. Part Name Description Q510 Transistor Squelch input control switch LED driver Q511 Transistor Squelch input switch Q1,2 Transistor TX/BUSY indication LED switch Q701 MIC mute switch...

  • Page 17: Parts List

    TK-7302/7302 /7302H/7302H PARTS LIST CAPACITORS 2 2 0 • Capacitor value CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc.
  • Page 18 CC73HCH1H101J CHIP C 100PF CK73FB0J106K CHIP C 10UF CK73HB1A104K CHIP C 0.10UF C43-46 CK73HB1H471K CHIP C 470PF CK73FB0J106K CHIP C 10UF CK73HB1H102K CHIP C 1000PF K : TK-7302(V)K HK : TK-7302HK HVK : TK-7302H(V)K M : TK-7302M HM : TK-7302HM...
  • Page 19 C538 CK73HB1E103K CHIP C 0.010UF C307 CK73HB1H102K CHIP C 1000PF C541 CK73HB1E103K CHIP C 0.010UF C313 CK73HB1H102K CHIP C 1000PF C543 CC73HCH1H010B CHIP C 1.0PF K : TK-7302(V)K HK : TK-7302HK HVK : TK-7302H(V)K M : TK-7302M HM : TK-7302HM...
  • Page 20 C833 CK73HB1H102K CHIP C 1000PF C731,732 CK73HB1H471K CHIP C 470PF C835 CK73GB1H102K CHIP C 1000PF C735 CK73HB1A104K CHIP C 0.10UF C837,838 CK73HB1H102K CHIP C 1000PF K : TK-7302(V)K HK : TK-7302HK HVK : TK-7302H(V)K M : TK-7302M HM : TK-7302HM...
  • Page 21 C926,927 CK73HB1H102K CHIP C 1000PF L40-1891-86 SMALL FIXED INDUCTOR (1.8UH) C928 CK73HB1A104K CHIP C 0.10UF C929 CK73HB1H102K CHIP C 1000PF L40-6875-71 SMALL FIXED INDUCTOR (68NH) K : TK-7302(V)K HK : TK-7302HK HVK : TK-7302H(V)K M : TK-7302M HM : TK-7302HM...
  • Page 22 RK73HB1J122J CHIP R 1.2K 1/16W RK73HB1J471J CHIP R 1/16W R501 RK73HB1J334J CHIP R 330K 1/16W RK73GB2A104J CHIP R 100K 1/10W R502 RK73HB1J101J CHIP R 1/16W K : TK-7302(V)K HK : TK-7302HK HVK : TK-7302H(V)K M : TK-7302M HM : TK-7302HM...
  • Page 23 CHIP R 1.0K 1/16W R713 RK73HB1J104J CHIP R 100K 1/16W R792 RK73GH2A134D CHIP R 130K 1/10W R714,715 RK73HB1J223J CHIP R 1/16W R793 RK73GH2A183D CHIP R 1/10W K : TK-7302(V)K HK : TK-7302HK HVK : TK-7302H(V)K M : TK-7302M HM : TK-7302HM...
  • Page 24 R890 RK73HB1J102J CHIP R 1.0K 1/16W D719,720 HVC131 DIODE R891-893 RK73HB1J000J CHIP R 1/16W MB15E03SL-E1 MOS-IC ✽ R894,895 RK73HB1J102J CHIP R 1.0K 1/16W BD7542FVM MOS-IC K : TK-7302(V)K HK : TK-7302HK HVK : TK-7302H(V)K M : TK-7302M HM : TK-7302HM...
  • Page 25 TH300-302 B57331V2104J THERMISTOR TH501 NCP18WM474J0S THERMISTOR K : TK-7302(V)K HK : TK-7302HK HVK : TK-7302H(V)K If a part reference number is listed in a shaded M : TK-7302M HM : TK-7302HM box, that part does not come with the PCB.

  • Page 26: Exploded View

    TK-7302/7302 /7302H/7302H EXPLODED VIEW M2.6 x 4 (Bi) : N35-2604-43 M3 x 8 : N67-3008-48 M2 x 8 : N80-2008-48 M2.6 x 8 (Br-Tap) : N87-2608-48 J701 J700 IC705 IC301 Dx12 R374 TX-RX unit Chassis D23 101 Caution label Display unit Model name plate Parts with the exploded numbers larger than 700 are not supplied.

  • Page 27: Packing

    TK-7302/7302 /7302H/7302H PACKING 26 Bracket (J29-0726-03) 14 Fuse (Blade type) x 2 (F52-0023-05): M,K (F52-0024-05): HM,HK,HVK 21 Packing fixture (H12-3178-05) 10 DC cord assy (E30-7523-55) Protection bag 21 Packing fixture (H12-3178-05) 22 Item carton case (H52-2310-12) 33 Microphone (KMC-30) (T91-0624-65): HK...

  • Page 28: Adjustment

    TK-7302/7302 /7302H/7302H ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifi cations Frequency Range 136 to 174MHz Standard Signal Generator (SSG) Modulation Frequency modulation and external modulation Output –127dBm/0.1µV to greater than –7dBm/100mV Input Impedance 50Ω Power Meter Operation Frequency...
  • Page 29 TK-7302/7302 /7302H/7302H ADJUSTMENT Test Frequency 3 or 5 Reference Level Adjustment Frequency Channel RX (MHz) TX (MHz) Tuning point RX (MHz) TX (MHz) 155.05 155.10 136.05 136.10 136.05 136.10 145.55 145.50 173.95 173.90 155.05 155.10 155.00 155.00 164.55 164.50 155.20 155.20...
  • Page 30 2. High Power 1) CH: TX low Power ±1.0W (Auto) CH: TX low’ meter 8.0A or less (Narrow) CH: TX center CH: TX high’ • TK-7302/ CH: TX high 7302(V) Transmit • TK-7302H/ ±2.0W 7302H(V) 14.0A or less...
  • Page 31 TK-7302/7302 /7302H/7302H ADJUSTMENT Measurement Adjustment Item Condition Specifi cations / Remarks Test- Unit Terminal Unit Parts Method equipment 3. Low Power 1) CH: TX low Power ±0.5W (Auto) CH: TX low’ meter 4.0A or less (Narrow) CH: TX center CH: TX high’...
  • Page 32 TK-7302/7302 /7302H/7302H ADJUSTMENT Receiver Section Measurement Adjustment Item Condition Specifi cations / Remarks Test- Unit Terminal Unit Parts Method equipment 1. RX 1) CH: RX low (Wide) Write Sensitivity CH: RX low’ (Wide) Oscillo- Ext.SP CH: RX center (Wide) scope CH: RX high’...
  • Page 33 TK-7302/7302 /7302H/7302H ADJUSTMENT Measurement Adjustment Item Condition Specifi cations / Remarks Test- Unit Terminal Unit Parts Method equipment RSSI 1) CH: RX low Write (Narrow) CH: RX low’ Oscillo- Ext.SP CH: RX center scope CH: RX high’ AF VTVM CH: RX high Distortion 2) SSG output: –120dBm (0.22µV)

  • Page 34: Terminal Function

    TK-7302/7302 /7302H/7302H TERMINAL FUNCTION Display unit (X54-3670-20) TX-RX unit (X57-7680-XX) Pin No. Name Function Pin No. Name Function CN702 POWER Detection output of power switch Ground MKEY I/O MIC data detection 8V DC power supply PTT/TXD I/O PTT/PC serial data...
  • Page 35 TK-7302/7302 /7302H/7302H TERMINAL FUNCTION Function Port Assignment Pin No. Name Function LEDI LED data output Scrambler Name LECE LED enable output FNC1 LECL LED clock output FNC2 LELH LED latch output FNC3 TX relay LERE LED reset output FNC4 Scrambler...

  • Page 36: Pc Board

    TK-7302/7302 /7302H/7302H PC BOARD DISPLAY UNIT (X54-3670-20) Component side view (J79-0249-09) POWER VOL UP VOL DOWN HOOK DISPLAY UNIT (X54-3670-20) Foil side view (J79-0249-09)
  • Page 37 TK-7302/7302 /7302H/7302H PC BOARD DISPLAY UNIT (X54-3670-20) Component side view (J79-0249-09) J79-0249-09 Ref. No. Address CH UP CH DOWN Component side Layer 1 Layer 2 Foil side DISPLAY UNIT (X54-3670-20) Foil side view (J79-0249-09) Ref. No. Address Component side Layer 1...

  • Page 38: Tx-Rx Unit (X57-7680-Xx)

    TK-7302/7302 /7302H/7302H PC BOARD TX-RX UNIT (X57-7680-XX) -11: TK-7302(V) K -12: TK-7302H K -16: TK-7302H(V) K -20: TK-7302 M -21: TK-7302H M Component side view (J79-0247-09) J701 J700 EXT.SP D-SUB C865 C863 C957 C866 C840 C867 C869 C850 C846 Q720...
  • Page 39 TK-7302/7302 /7302H/7302H PC BOARD TX-RX UNIT (X57-7680-XX) -11: TK-7302(V) K -12: TK-7302H K -16: TK-7302H(V) K -20: TK-7302 M -21: TK-7302H M Component side view (J79-0247-09) Ref. No. Address IC301 IC702 IC703 IC704 IC705 IC706 IC707 IC708 IC301 IC709 Q501...
  • Page 40 TK-7302/7302 /7302H/7302H PC BOARD TX-RX UNIT (X57-7680-XX) -11: TK-7302(V) K -12: TK-7302H K -16: TK-7302H(V) K -20: TK-7302 M -21: TK-7302H M Foil side view (J79-0247-09) R374 C383 L316 C894 C374 TH300 L314 C372 C364 TH302 C384 R382 C392 C351...
  • Page 41 TK-7302/7302 /7302H/7302H PC BOARD TX-RX UNIT (X57-7680-XX) -11: TK-7302(V) K -12: TK-7302H K -16: TK-7302H(V) K -20: TK-7302 M -21: TK-7302H M Foil side view (J79-0247-09) Ref. No. Address Ref. No. Address C886 Q724 C885 R889 C857 IC300 C859 IC500 12F...

  • Page 42: Schematic Diagram

    TK-7302/7302 /7302H/7302H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7680-XX) R7 1k PLCK R6 1k PLDT R5 1k PLLE R973 R972 PLPS MB15E03SL-E1 3.3C D15-17 TX/RX FIN FILTER SWITCH C934 1.59V C933 3.5p 1000p 1000p R955 Q729 0.1u PLL IC 0.65V CLOCK AMP 3.21V...
  • Page 43 TK-7302/7302 /7302H/7302H SCHEMATIC DIAGRAM TX-RX UNIT (X57-76 0-XX) C73 6p TX/RX R : 7.06V R : 1.20V Q9,10 VCO BUFFER AMP BAND SWITCH RX VCO R : 0V 2.42V 5.34V 0.74V 6.80V MCH3914(7)-H 2.65V T : 3.32V 4.7u 100p 1SV325F...
  • Page 44 TK-7302/7302 /7302H/7302H SCHEMATIC DIAGRAM TX-RX UNIT (X57-76 0-XX) R354 R357 *IC301 R355 R358 POWER COUPPLER MODULE D302 C373 C381 C365 FORWARD POWER L407CDB 1000p L311 D303 L314 L315 C366 1.5T 1000p L407CDB D302-305 REVERSE POWER R323 SWITCH T : 0.81V T : 8.91V...
  • Page 45 TK-7302/7302 /7302H/7302H SCHEMATIC DIAGRAM TX-RX UNIT (X57-76 0-XX) 3.3M AMPSW 3.29V C809 0.1u C810 RLED 1000p GLED BLED BLED CP705 1k KMO1 KMO1 VCC2=3.3V KMO2 KMO2 SPMUTE SP MUTE R895 1k CSN1 CSN1 KMO3 KMO3 SCLK SCLK1 R894 1k KMI1...
  • Page 46 TK-7302/7302 /7302H/7302H SCHEMATIC DIAGRAM TX-RX UNIT (X57-76 0-XX) Q715,723 IC705 SP MUTE SWITCH LA4600 C821 R842 R843 AF AMP 2.2k R : 3.28V R838 Q715 4.7k SSM3K05FU AMPSW C832 C954 C955 0.22u 1000p 1000p C882 R886 C883 0.22u J701 R : 3.28V...
  • Page 47 TK-7302/7302 /7302H/7302H SCHEMATIC DIAGRAM DISPLAY UNIT (X54-3670-20) D1-5 KEY BACKLIGHT 4.06V 13.53V Q3,4 KEY BACKLIGHT 7 HOOK CONTROL SWITCH HOOK B30-2282-05 B30-2282-05 4.08V KRA225S B30-2282-05 B30-2282-05 3 GND 1.2k 1.90V B30-2282-05 X57-7680-XX R933 R934 TK-7302 TK-7302H DA221 TK-7302(V) KRC102S-P INT SP...

  • Page 48: Block Diagram

    TK-7302/7302 /7302H/7302H BLOCK DIAGRAM FNC1 FNC6 FNC2 FNC3 FNC4 DETO FNC5 DATAI FNC5 FNC2 FNC8 FNC1 DATAI TXAFI RXAF FNC6 FNC7 FNC3 TXAFO DETO ALTI RXAFO...

  • Page 49: Block Diagram

    TK-7302/7302 /7302H/7302H BLOCK DIAGRAM IC301 S-AV33A (TK-7302/7302(V)) RA60H1317M1A (TK-7302H/7302H(V)) M C U TXAFI RXAFI RXAFO FNC4...

  • Page 50: Level Diagram

    TK-7302/7302 /7302H/7302H LEVEL DIAGRAM...

  • Page 51: Optional Accessories

    TK-7302/7302 /7302H/7302H OPTIONAL ACCESSORIES KCT-60 (Connection Cable) ■ External View...

  • Page 52: Specifications

    Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Bp 58416 Villepinte, 95944 Roissy Ch De Gaulle Cedex Kwai Fong, N.T., Hong Kong KENWOOD House, Dwight Road, Watford, Herts., 1 Ang Mo Kio Street 63, Singapore 569110 WD18 9EB United Kingdom...

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