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Kenwood RXD-655 Service Manual

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MINI HiFi COMPONENT SYSTEM
RXD-655/655-GR/655-H/655E/655E-GR
RXD-655E-H/655L/655M/655M-H
RXD-755/755E/755L/755M
SERVICE MANUAL
(XD-655~855)**
Panel ass'y *
(A60-)
Front glass *
(B10-)
**Refer to page 2 if you want to know system configuration.
In compliance with Federal Regulations, following are repro-
duction of labels on, or inside the product relating to laser prod-
uct safety.
© 2001-6 PRINTED IN KOREA
B51-5737-00 (K/K) 2308
* Refer to parts list on page 33.
KENWOOD-Crop. certifies this equipment conforms to DHHS
Regulations No.21 CFR 1040. 10, Chapter 1, subchapter J.
DANGER : Laser radiation when open and interlock defeated.
AVOID DIRECT EXPOSURE TO BEAM.
Panel(CD)
(A60-2090-08)
Knob(VOLUME)
(K27-2470-08)
Dress ring
(A21-3957-08)
70%

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  Summary of Contents for Kenwood RXD-655

  • Page 1 **Refer to page 2 if you want to know system configuration. * Refer to parts list on page 33. KENWOOD-Crop. certifies this equipment conforms to DHHS In compliance with Federal Regulations, following are repro- Regulations No.21 CFR 1040. 10, Chapter 1, subchapter J.
  • Page 2: Table Of Contents

    RXD-655/755 CONTENTS / ACCESSORIES Contents CONTENTS / ACCESSORIES ........2 PC BOARD .............. 16 EXTERNAL VIEW ............3 SCHEMATIC DIAGRAM .......... 23 DISASSEMBLY FOR REPAIR........4 EXPLODED VIEW ............31 BLOCK DIAGRAM ............9 PARTS LIST..............33 CIRCUIT DESCRIPTION ..........10 SPECIFICATIONS ........Back cover ADJUSTMENT ............15...
  • Page 3: External View

    RXD-655/755 EXTERNAL VIEW Cabinet(TOP) (A02-3014-08) ANTENNA FM Antenna (E70-0145-08) Pin jack(AM) AM LOOP (E40-8933-08) VIDEO Pin jack /AUX (E63-1219-08) SPEAKERS Lock terminal board (E70-0144-08) AC power cord bushing (J42-0338-08) AC power cord * (E30-) * Refer to parts list on page 33 .
  • Page 4: Disassembly For Repair

    RXD-655/755 DISASSEMBLY FOR REPAIR Caution on Disassembly Follow the below-mentioned notes when disassembling (A1)x2 Top Cabinet the unit and reassembling it, to keep it safe and ensure ø3x12mm excellent performance: 1. Take cassette tape and compact disc out of the unit.
  • Page 5 RXD-655/755 DISASSEMBLY FOR REPAIR (L2) x1 CLAMP LEVER Turntable CAM GEAR RIB Disc Tray (L1) x2 Figure 8-1 (F1)x1 (F1)x1 ø3x6mm ø3x10mm CD Player Unit Figure 8-4 (E2)x2 (E3)x1 (M1) x3 (E4)x1 Power Supply Main PWB (E2)x1 (M1) x3 (F2)x1...
  • Page 6 RXD-655/755 DISASSEMBLY FOR REPAIR (P2) x3 Mechanism Loading Motor (P1) x1 (P1) x1 TAPE2 Record/Playback Head (Q1) x5 Erase Head Figure 9-1 (A1)x2 Ø2x9mm Figure 10-1 REMOVING AND REINSTALLING TAPE1 THE MAIN PARTS Playback Head TAPE MECHANISM SECTION Perform steps 1 to 7 and 9 of the disassembly method to remove the tape mechanism.
  • Page 7 RXD-655/755 DISASSEMBLY FOR REPAIR How to remove the belt (TAPE 2) (See Fig. 10-4) 1. Remove the main belt (E1) x 1 pc., from the motor side. 2. Remove the FF/REW belt (E2) x 1 pc. Motor How to remove the motor (See Fig. 10-5) 1.
  • Page 8 FM IF SO301A FE301 CF301 CF303 ANTENNA FL701 FM IF TERMINAL Q301 FM IF DISPLAY QT21 FM FRONT END to CD X351 CF351 SECTION 456kHz FM IF T351 L351 AM IF L.P.F Q706- DRIVER IC700(1/2) Q907 AM LOOP ANT IC303 RX701 M901 FAN MOTOR...
  • Page 9 33.8688MHz CONSTANT RFVDD VOLTAGE CNP7 VVDD R-CH +3.3V AGND PICK UP UNIT ADAVDD LCHO L-CH MAIN DGND SECTION LVSS XVDD RVSS LVDD RCHO RVDD FIN1 CONT4 CNP8 FIN2 LC78645E SERVO/SIGNAL TIN1 CONTROL CONT3 TIN2 CONT2 5 DI DISPLAY SECTION CD RES CLAMP SW OC.
  • Page 10: Circuit Description

    RXD-655/755 CIRCUIT DESCRIPTION 1. Port Description of Microprocessor Port No. Port Name Function POWER SUPPLY(+5V) -20dB ATT -20dB ATTENUATION NO USE/DSA STB T BIAS DECK BIAS CONTROL T T1/T2 DECK T1/T2 CHANGE OVER REC/PLAY DECK RECORDING/PLAYBACK CHANGE OVER RES OUT...
  • Page 11: Circuit Description

    RXD-655/755 CIRCUIT DESCRIPTION Port No. Port Name Function DECK REVERSE RECORDING SWITCH INPUT MIC IN OPEN MP3 LED OPEN DESTOUT DISCRIMINATION PORT FOR DESTINATION STANDBY LED STANDBY LED CONTROL KARAOKE LATCH OPEN NO USE/MPEG POW CONNECTED TO GROUND RDS RST...
  • Page 12 RXD-655/755 CIRCUIT DESCRIPTION 2-2 RDS Demodulation LSI(TUNER Section, ICT21) Port No. Port Name Function VREF Reference voltage output. MPXIN Baseband (multiplexed) signal input. VDDA Analog power supply (+5V). VSSA Analog ground. FLOUT Subcarrier output (filter output). Subcarrier input (comparator input).
  • Page 13 RXD-655/755 CIRCUIT DESCRIPTON 3-3 Contents of the Test Mode Enter the Test Mode 3-3-1 CD Test Mode OPEN/CLOSE operation is using manual << $ ! >>, << ⁄ › >> buttons make pick's slide possible. << PLAY >> key input <<...
  • Page 14 RXD-655/755 CIRCUIT DESCRIPTON 3-3-3 Initializing the CD changer Function: The SET will be set to "shipping - All the function, condition are initialized. - CLEAR ALL TUNER PRESET MEMORY . - CLOCK INITIAL - CLEAR CD MEMORY - Initialize the CD changer mecha and compact cassette mecha.
  • Page 15 RXD-655/755 CIRCUIT DESCRIPTON 3-3-4 CD Changer Aging Test Mode START " " KEY TRAY OPEN IF THE ERROR OCCURS, GO TO ERROR MODE DISC SKIP DISC SKIP DISC SKIP TRAY CLOSE DISC X PLAY DISC SKIP DISC Y PLAY DISC SKIP DISC Z PLAY 4.
  • Page 16: Adjustment

    RXD-655/755 ADJUSTMENT TUNER SECTION fL : Low-range frequency fH : High-range frequency • AM IF/RF Signal generator : 400HZ, 30%, AM modulated Test Stage Frequency Frequency Display Setting/Adjusting PartsInstrument Connection ✽ AM IF 450kHz 1620kHz T351 ✽ AM Band Coverage 522kHz (fL) : T306 1.1±0.1V...
  • Page 17: Pc Board

    PC BOARD (Component side view) CD SECTION CNP8 CNP5 CNP7 BI1-A CNP4 CNP3 Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 18: Schematic Diagram

    PC BOARD (Component side view) MAIN SECTION L352 XT21 CT23 CT25 Q122 C146 R156 RT26 RT24 R140 WT902 J108 R146 CT24 JK670 JK670 R132 R158 R154 RT21 ICT21 C140 C124 QT21 C135 R142 LT22 C136 R145 Q121 C141 C134 J679 C384 C145 R378...
  • Page 19 PC BOARD (Component side view) POWER SECTION CNP901 J921 R929 L901 Q905 Q903 C927 J919 C929 L903 J930 Q904 R953 R917 J931 C930 R931 C958 R932 C928 R954 R941 R930 J933 C915 L902 R947 C918 C917 J934 R942 R945 J935 J910 RL901 J908...
  • Page 20 PC BOARD (Component side view) DISPLAY SECTION Q713 J700 C704 LED709 39 38 LED700 SW719 SW704 R804 R760 Q706 R805 D700 J717 R761 D701 J718 Q707 R762 EX-BASS J709 R763 D702 J719 R764 J710 Q708 D703 J722 J720 R765 J724 Q709 RD16 SW703...
  • Page 21 AUDIO PROCESSOR (E,T,E2)TYPE ONLY IC601 CNP701 CNS901 XT21 C644 21 22 23 24 25 26 11 10 8 7 6 5 4 3 2 4.332MHz ICT21 220P C645 DEMODULATOR 2.5V 2.6V 220P XOUT 3 VSS VSSD TEST C605 4.7u50 5.2V 5.0V CT26 R609...
  • Page 22 TUNER/MAIN SECTION JK601 R633 Lch 1 AUX IN C643 R634 CD SECTION CLK 24 220P Rch 2 VDD 23 10.0V C602 3.2V 5.0V VREF 22 5.0V 22u25 BI11 C614 R608 A GND R OUT 21 5.0V 10u50 CD GND LASER CNP8 DRIVER 0.022...
  • Page 23 DISPLAY SECTION IC901 IC561,562 : KIA4558P IC700 IC901 Q801 : AN78L05 Q802,901-904 : KTC3199GR POWER TR12 RX701 : W02-2689-08 TR11 Q803 : KTA1274Y TR19 Q905 : KRC107M Q700,709 : KRC102M Q907 : KTC3203Y TR16 Q703 : KTA1273Y Q704,705 : KTA1271Y D801,806-808,850,851, TR13 Q706-708...
  • Page 24 AM mode. TAPE TUNER RD01 RD02 RD03 MODULATION MODE CARRIER ANT INPUT SW701 SW702 SW703 SW704 FREQUENCY DEVIATION 98MHz 1kHz STEREO 67.5kHz 7.5kHz(Pilot) 60dB +12V POWER VIDEO REVERSE X-BASS 1000(999)kHz 400Hz MONO 30% MOD 60dB MODE RXD-655/755 RXD-755/655 Y39-4002-70...
  • Page 25: Exploded View

    RXD-655/755 EXPLODED VIEW (CD MECHANISM) AL SCREW : N09-5335-08 AM ø3x8 : N09-5332-08 AN ø2.6x6 : N32-2606-46 AQ ø2x3 : N30-2003-46 AR WASHER : N19-1435-05 AS ø2x5 : N86-2005-46 PWB-F PWB-B PWB-C Parts with exploded numbers larger than 700 are not supplied.
  • Page 26 3x10 N09-5331-08 SCREW N09-5334-08 SCREW N09-5335-08 φ 3x10 N09-5338-08 φ N09-5343-08 φ N09-5346-08 φ SPEAKER 3x14 N09-5347-08 TERMINAL SO901 N09-5348-08 φ N09-5349-08 φ 3x10 N09-5222-08 φ 3x10 N09-5337-08 POWER TRANS 2.6x4 N09-5336-08 T801 DISP DISC SKIP SW720 SW721 RPEH RXD-655/755...
  • Page 27 Description Ref. No Parts No. ress Parts nation marks Parts nation marks ress ✽ E30-2915-08 AC POWER CORD QACCB0009AW00 RXD-655/755 ✽ E30-7227-08 AC POWER CORD QACCE0010AW00 EE2M ✽ E30-7227-08 AC POWER CORD QACCE0010AW00 M3M4 ✽ A02-3014-08 CABINET(TOP) GCAB-1195AWSA ✽ E30-7239-08 AC POWER CORD QACCL0005AW00 ✽...
  • Page 28 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 29 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 30 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 31 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 32 ✽ New Parts ✽ New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 33: Parts List

    China England Europe Germany Korea Malaysia ZD561 DZ6R2BSC ZENER DIODE VHEDZ6R2BSC-1T MODEL ABB. ✽ ZD801 DZ330BSC ZENER DIODE VHEDZ330BSC-1T RXD-655 ✽ ZD802 DZ6R2BSA ZENER DIODE VHEDZ6R2BSA-1T RXD-655E ✽ ZD803 DZ4R3BSC ZENER DIODE VHEDZ4R3BSC-1T RXD-655-GR ✽ ZD804 DZ110BSB ZENER DIODE VHEDZ110BSB-1T...
  • Page 34: Specifications

    KENWOOD ELECTRONICS GULF FZE KENWOOD ELECTRONICS U.K. LIMITED P.O.Box 61318, Jebel Ali, Dubai, U.A.E. KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB., United Kingdom KENWOOD ELECTRONICS SINGAPORE PTE LTD. KENWOOD ELECTRONICS BELGUM N.V. No. 1 Genting Lane #02-02, KENWOOD Building, Singapore, 349544 Meachelsesteenweg 418, B-1930 Zaventem, Belgium KENWOOD ELECTRONICS (MALAYSIA) SDN BHD.