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JVC KD-S700GN Service Manual
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JVC KD-S700GN Service Manual

JVC KD-S700GN Service Manual

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SERVICE MANUAL
KD-S700GN/KD-S700BU
Contents
operation unit TOC read
COPYRIGHT
CD RECEIVER
KD-S7250
1-2
1-3
1-4
Discription of major ICs
1-11
1-12
2001 VICTOR COMPANY OF JAPAN, LTD.
Area Suffix
J ----Northern America
1-14
1-14
1-15
No.49670
Dec. 2001

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Summary of Contents for JVC KD-S700GN

  • Page 1: Table Of Contents

    KD-S700GN/KD-S700BU KD-S7250 SERVICE MANUAL CD RECEIVER KD-S700GN/KD-S700BU KD-S7250 Area Suffix J ----Northern America Contents Safety precaution Maintenance of laser pickup 1-14 Preventing static electricity Replacement of laser pickup 1-14 Disassembly method Discription of major ICs 1-15 Adjustment method 1-11 Flow of functional...

  • Page 2: Safety Precaution

    KD-S700GN/KD-S700BU KD-S7250 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: Preventing Static Electricity

    KD-S700GN/KD-S700BU KD-S7250 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-S700GN/KD-S700BU KD-S7250 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...
  • Page 5 KD-S700GN/KD-S700BU KD-S7250 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-S700GN/KD-S700BU KD-S7250 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-S700GN/KD-S700BU KD-S7250 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. Unjoint the twelve joints c with the front panel and Rear cover the rear cover.
  • Page 8 KD-S700GN/KD-S700BU KD-S7250 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-S700GN/KD-S700BU KD-S7250 assembly Damper bracket 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-S700GN/KD-S700BU KD-S7250 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.

  • Page 11: Adjustment Method

    FM 87.5MHz ~ 107.9MHz 6. Digital tester AM 530kHz ~ 1710 kHz 7. Tracking offset meter 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: Flow Of Functional

    KD-S700GN/KD-S700BU KD-S7250 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 3.3v...
  • Page 13 KD-S700GN/KD-S700BU KD-S7250 Feed Section Check CD 9V Is the voltage output at Is the wiring for IC521 Is 3.3V present at and 5V. IC521 pin "40" 3.3V or 0V? (57) ~ (63) correct? IC561 pin "20"? Check the vicinity of IC521.

  • Page 14: Maintenance Of Laser Pickup

    KD-S700GN/KD-S700BU KD-S7250 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 KD-S700GN/KD-S700BU KD-S7250 Description of major ICs HA13164A(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-S700GN/KD-S700BU KD-S7250 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...
  • Page 17 KD-S700GN/KD-S700BU KD-S7250 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...
  • Page 18 KD-S700GN/KD-S700BU KD-S7250 TA2147F-X(IC501):RF AMP 1.Terminal layout 2.Block diagram PEAK GVSW 12 RFDC 20 A TEBC 50 A RFRP BOTTOM RFRPIN PEAK RFGO 1.75k 240k 15pF x0.5 RFGC 240k 15pF x0.5 AGCIN 180k 40pF 1-18...
  • Page 19 KD-S700GN/KD-S700BU KD-S7250 3.Pin function TA2147F-X Pin No. Symbol Function 3.3V Power supply pin Main-beam amp input pin Main-beam amp input pin Sub-beam amp input pin Sub-beam input pin Monitor photo diode amp input pin Laser diode amp output pin APC circuit ON/OFF control signal,laser diode (LDO) control signal input or bottom/peak detection frequency change pin.
  • Page 20 KD-S700GN/KD-S700BU KD-S7250 TC9490FA(IC521):DSP&DAC 1.Terminal layout & block daiagram TEZI Clock generator SBAD 1-bit Servo control RFRP RFZI ZDET RFCT Digital equalizer Address automatic circuit adjustment circuit BUS0 Data CLV servo slicer BUS1 SLCO BUS2 Sync signal protection BUS3 VCOF Audio output...
  • Page 21 KD-S700GN/KD-S700BU KD-S7250 2.Pin function TC9490FA(2/3) Pin No. Symbol Function Bit clock outputpin 32fs, 48fs, or 64fs selectable by command. LRCK L/R channel clock output pin."L" for L channe and "H" for R channel. Output polarity can be inverted by command.
  • Page 22 KD-S700GN/KD-S700BU KD-S7250 2.Pin function TC9490FA(3/3) Pin No. Symbol Function RFGC RF amplitude adjustment control signal output pin. TEBC Tracking balance control signal output pin. APC circuit ON/OFF signal output pin. At laser on,high impedance with UHS="L" ,H output with UHS="H".
  • Page 23 KD-S700GN/KD-S700BU KD-S7250 BD3860K (IC161):E.Vol&LOUD 1.Terminal layout 2.Block diagram 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...
  • Page 24 KD-S700GN/KD-S700BU KD-S7250 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...
  • Page 25 KD-S700GN/KD-S700BU KD-S7250 2.Terminal layout 3.Pin function LA4743K Pin No. Symbol Function Header of IC Power GND Outpur(-) for front Rch RFO- STBY Stand by input RFO+ Output (+) for front Rch VCC1/2 Power input RRO- Output (-) for rear Rch...
  • Page 26 KD-S700GN/KD-S700BU KD-S7250 LA6574H-X (IC561) :CD driver 1.Terminal layout & brock daiagram Thermal Shutdown VCC2 1 28 REV POWER supplise 27 FWD V05- 2 26 S-GND V05+ 3 25 VCONT V04+ 4 V04- 5 24 VIN4 V03+ 6 23 VIN4G V03- 7...
  • Page 27 KD-S700GN/KD-S700BU KD-S7250 HD74HC126FP-X (IC801) : Buffer 1.Terminal layout 3.Pin function Input Output Note) H:High level L:Low level X:Irrelevant Z:Off(High-impedance) State a 3-state input 2.Block diagram Output Input Output Sample as Load Circuit 1 Output Sample as Load Circuit 1 Output...
  • Page 28 KD-S700GN/KD-S700BU KD-S7250 PT6523LQ(IC601):LCD DRIVER 1.Pin layout 48 ~ 33 1 ~ 16 2.Block diagram COM1 COM2 COM3 SG52 SG5 SG4 VDD1 COMMON SEGMENT DRIVER & LATCH DRIVER VDD2 CLOCK GENERATOR SHIFT REGISTER ADDRESS DETECTOR 3.Pin function Pin No. Pin Name...
  • Page 29 KD-S700GN/KD-S700BU KD-S7250 NJM4565M-WE (IC571) : Ope. amp A OUTPUT B OUTPUT A INPUT A INPUT B INPUT B INPUT RPM6938-SV4(IC602) : Remote sensor 1.Block diagram Comp Rout Detector conversion trimming circuit magnetic shield 1-29...
  • Page 30 KD-S700GN/KD-S700BU KD-S7250 Block diagram TU.LCH FM/AM TU.RCH TUNER SW1 SW4 REST FEED REST REST FM/AM AMEO LOADING FMOSC FMEO SPINDLE CJ302 IC161 IC561 IC571 FEED LINE OUT E.VOL LOADING SERVO LOADING LOADING TRACKING S.METER MOTOR FOCUS SD/ST ,MONO CD. L DRIVER S.METER...
  • Page 31 KD-S700GN/KD-S700BU KD-S700GN/KD-S700BU KD-S7250 KD-S7250 Standard schematic diagrams Main amp section Q976 UN2111 D976 1SS133 R331 R332 Q977 MUTE UN2111 Q331 2.2k C331 QAU0257-001 R335 2SD1048/6-7/-X 100P QNB0100-002 R325 2.2k Q321 C321 2SD1048/6-7/-X 100P R321 R322 MUTE.CONT 4.7u R351 R352 CJ321...
  • Page 32 KD-S700GN/KD-S700BU KD-S7250 CD servo control section R564 6.8k R563 5.6k R572 R575 C572 C573 R574 R571 CD.L R562 6.8k R573 120p C561 4.7/25 47/6.3 R566 8.2k( 1/10W) Q561 CN501 2SB1322 C571 C574 QGB2027M1-26S 820p 820p C581 C584 820p 820p R593...
  • Page 33 KD-S700GN/KD-S700BU KD-S700GN/KD-S700BU KD-S7250 KD-S7250 LCD & key control section IC602 JS690 RPM6938-SV4 QSW0793-001 R661 C681 0.022 R662 VCM0335-001 CJ601 LCD1 ILL_10V REMOCON ENC1 ENC2 BUS2 LCD.CL LCD.DA LCD.CE BUS1 KEY0 KEY1 KEY2 IC601 R605 R604 R603 R602 R601 Key0 PT6523LQ R651 3.9k...
  • Page 34 KD-S700GN/KD-S700BU KD-S7250 Printed circuit boards Main board(Forward side) IC901 C901 L901 Q331 Q341 Q351 CJ322 CJ321 C305 CN901 C316 C914 C308 Q321 C315 C304 C306 C913 C313 C906 C904 R902 R341 D901 C903 C320 R355 C314 R335 R901 R325 R331...
  • Page 35 KD-S700GN/KD-S700BU KD-S7250 Main board(Reverse side) CN901 C901 C331 C321 C341 CJ322 IC901 L901 C902 D901 R812 C308 C913 C904 C906 R901 R972 C903 C320 C907 R891 D331 C910 C915 C909 C905 C191 R967 C192 C196 R892 D341 C908 R191 R321...

  • Page 36: Kd-S700Gn/Kd-S700Bu Kd-S7250

    KD-S700GN/KD-S700BU KD-S7250 VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan 200112 (No.49670)

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Kd-s700buKd-s7250