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JVC KD-S687 Service Manual

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SERVICE MANUAL
Contents
Safety precaution
Preventing static electricity
Disassembly method
Adjustment method
CD RECEIVER
KD-S687
1-2
1-3
1-4
1-11
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
UR ------------------- Brazil
Flow of functional
operation unit TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
KD-S687
Area Suffix
1-12
1-14
1-14
1-15 26
No.49737
Apr. 2002

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Summary of Contents for JVC KD-S687

  • Page 1 KD-S687 SERVICE MANUAL CD RECEIVER KD-S687 Area Suffix UR ------------------- Brazil Contents Safety precaution Flow of functional Preventing static electricity operation unit TOC read 1-12 Disassembly method Maintenance of laser pickup 1-14 Adjustment method 1-11 Replacement of laser pickup 1-14...

  • Page 2: Safety Precaution

    KD-S687 Safety precaution Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. Please use enough caution not to see the beam directly or touch it in case of an...
  • Page 3 KD-S687 Preventing static electricity 1.Grounding to prevent damage by static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

  • Page 4: Disassembly Method

    KD-S687 Disassembly method <Main body> Removing the front panel assembly (See Fig.1) Press the eject button in the lower right part of the front panel. Remove the front panel assembly from the body. Front panel assembly Eject button Fig.1 Tab a Removing the front chassis assembly (See Fig.2 and 3)
  • Page 5 KD-S687 Removing the heat sink (See Fig.4) Remove the three screws A on the left side of the body. Heat sink Fig.4 Joints b Removing the bottom cover (See Fig.5 and 6) Bottom cover Prior to performing the following procedure, remove the front panel assembly, the front chassis assembly and the heat sink.
  • Page 6 KD-S687 Removing the main board (See Fig.7 and 8) Prior to performing the following procedure, remove the front panel assembly, the front chassis assembly, the heat sink and the bottom cover. Remove the screw B, the four screws C and the...
  • Page 7 KD-S687 Removing the control switch board (See Fig.10 to 12) Prior to performing the following procedure, remove the front panel assembly. Remove the four screws G attaching the rear cover on the back of the front panel assembly. Rear cover Unjoint the ten joints c with the front panel and the rear cover.

  • Page 8: Cd Mechanism Section

    KD-S687 Damper bracket <CD mechanism section> CD mechanism assembly Removing the CD mechanism control board (See Fig.1 and 2) Unsolder the part a and b on the CD mechanism control board. Remove the stator fixing the CD mechanism control board and the damper bracket (To remove the stator smoothly, pick up the center part).
  • Page 9 KD-S687 Damper bracket assembly CD mechanism Removing the CD mechanism assembly (See Fig.1, 6 to 9) Prior to performing the following procedure, remove the CD mechanism control board and the front bracket (loading motor). Remove the three screws D and the damper bracket.
  • Page 10 KD-S687 Removing the feed motor assembly FD screw Part i Feed motor assembly (See Fig.10) Prior to performing the following procedure, remove the CD mechanism control board, the front bracket Part j (loading motor) and the CD mechanism assembly. Remove the two screws F and the feed motor assembly.

  • Page 11: Adjustment Method

    6. Digital tester FM 87.5MHz ~ 107.9MHz 7. Tracking offset meter MW 530kHz ~ 1710 kHz 8. Test Disc JVC :CTS-1000 9. Extension cable for check EXTGS004-26P 1 Dummy load Exclusive dummy load should be used for AM,and FM. For FM dummy load,there is a loss of 6dB between SSG output and antenna input.The loss of 6dB need not be considered...
  • Page 12 KD-S687 Flow of functional operation until TOC read Power ON • When the laser diode correctly Set Function to CD • When the pickup correctly moves emits to the inner area of the disc Microprocessor Microprocessor Disc inserted commands commands TC9462 "53"...
  • Page 13 KD-S687 Feed Section Check CD 9V Is the voltage output at Is the wiring for IC521 Is 5V present at IC581 and 5V. IC521 pin "53" 5V or 0V? (90) ~ (100) correct? pin "11"? Check the vicinity of IC521.
  • Page 14 KD-S687 Maintenance of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab. (2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear.

  • Page 15: Description Of Major Ics

    KD-S687 Description of major ICs HA13164 (IC901) : Regulator 1.Terminal layout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2.Block diagram 100u 0.1u BATT.DET OUT ANT OUT Surge Protector 0.1u EXT OUT COMPOUT BIAS 0.1u...
  • Page 16 KD-S687 BD3860K (IC161):E.Volume 1.Terminal layout 2.Blockdiagram GND FIL VCC SEL1 VIN1 LOUD1 HF1 LF1 DET1 VCA1 MIX1 BBOUT1 TIN1 TNF1 BNF1 BOUT1 POWER FADER SUPPLY MAIN INPUT OUTF1 CH1 FRONT TREBLE BASS VOLUME GAIN 0 -5 dB LOW(f=50Hz) 6dB 0 -40 dB...
  • Page 17 KD-S687 LA6574H-X (IC561) : Power AMP 1.Pin layout / Block diagram Thermal Shuydown VCC2 1 28 REV POWER 27 FWD V05- 2 26 S-GND V05+ 3 25 VCONT V04+ 4 V04- 5 24 VIN4 23 VIN4G V03+ 6 22 VCC-S...
  • Page 18 KD-S687 UPD178078GF-559 (IC701) : System CPU 1.Pin layout 2.Pin function (1/2) Symbol FUNCTION No use BUSINT JVC bus communication line BUSSI JVC bus communication line BUSSO JVC bus communication line JBUS-SCK JVC bus communication line 6,7,8 No use VOL-DA Serial data for volume...
  • Page 19 KD-S687 2.Pin function (2/2) UPD178078GF-559 Symbol FUNCTION GNDPLL AMEO PLL error output for AM FMEO PLL error output for FM IC(VPP) Setting to write for flash RESET System reset CD mech switch REMOCON Remocon input VTR-LOGIC No use VR-CONT No use...
  • Page 20 KD-S687 LA4743K(IC302):Power AMP 1.Block diagram 2200 F 0.022 F Vcc 1/2 Vcc 3/4 IN 1 OUT 1+ 0.22 F OUT 1- PWR GND1 Protective circuit OUT 2+ IN 2 OUT 2- 0.22 F PWR GND2 ST BY Stand by Switch...
  • Page 21 KD-S687 2.Terminal layout 3.Pin function LA4743K Pin No. Symbol Function Header of IC Power GND Outpur(-) for front Rch OUTRR- STBY Stand by input Output (+) for front Rch OUTRR+ VCC1/2 Power input OUTRF- Output (-) for rear Rch Power GND...
  • Page 22 KD-S687 PT6523LQ(IC601) : 1.Terminal layout 2.Block diagram COMMON SEGMENT DRIVER & LATCH DRIVER CLOCK GENERATOR SHIFT REGISTER ADDRESS DETECTOR 3.Piin function Pin No. Pin Name Description 1~ 52 SG1 ~ SG52 Segment Output Pins 53~55 COM1 ~ COM3 Common Driver Output Pins...
  • Page 23 KD-S687 TA2147F-X (IC501) : RF amp 1. Pin layout & Block diagram 10 pF 30 k 40 k 1.3 V 180 k 40 pF 40 k 60 A 10 pF 2. Pin function Symbol Function 3.3V power supply pin Main-beam amp input pin...
  • Page 24 KD-S687 TC9490FA (IC521) : DSP 1. Pin layout & Block diagram 32 TEZI Clock generator SBAD 1-bit Servo control RFRP RFZI ZDET RFCT Digital equalizer Address automatic circuit adjustment circuit BUS0 Data CLV servo slicer 16 k BUS1 SLCO Sync signal...
  • Page 25 KD-S687 2. Pin function (2/2) TC9490FA Symbol Function RFCT RFRP signal center level input pin. RFZI RFRP signal zero-cross input pin. RFRP RF ripple signal input pin. Focus error signal input pin. SBADTEI Sub-beam adder signal input pin. Tracking error input pin. Inputs when tracking servo is on.
  • Page 26 KD-S687 NJM4565M-WE (IC571) : Ope. amp A OUTPUT A INPUT B OUTPUT B INPUT A INPUT B INPUT RPM6938-SV4(IC602) : Remote sensor 1.Block diagram Comp Rout Detector conversion trimming circuit magnetic shield 1-26...
  • Page 27 KD-S687 < M E M O > 1-27...
  • Page 28 KD-S687 VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan 200204 (No.49737)