JVC KD-S797 Service Manual
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JVC KD-S797 Service Manual

JVC KD-S797 Service Manual

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3 7 63 1515 0
SERVICE MANUAL
5
2003
49861
TE
L 13942296513
COMPACT
DIGITAL AUDIO
1
Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2
Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
4
Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
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CD RECEIVER
KD-S797
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TABLE OF CONTENTS

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COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
2 9
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1 3
1 5
UR ------------------------ Blazil
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2 8
0 5
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Area Suffix
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No.49861
9 9
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2003/5

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  • Page 1: Table Of Contents

    3 7 63 1515 0 SERVICE MANUAL CD RECEIVER 49861 2003 KD-S797 L 13942296513 Area Suffix UR ------------------------ Blazil COMPACT DIGITAL AUDIO TABLE OF CONTENTS Important Safety Precautions ............1-2 Disassembly method .

  • Page 2: Important Safety Precautions

    http://www.xiaoyu163.com SECTION 1 3 7 63 1515 0 Important Safety Precautions 1.1 Safety Precautions 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 adjustment or operation check.
  • Page 3 http://www.xiaoyu163.com 1.2 Preventing static electricity 3 7 63 1515 0 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. 1.2.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.

  • Page 4: Disassembly Method

    http://www.xiaoyu163.com SECTION 2 3 7 63 1515 0 Disassembly method 2.1 Main body 2.1.1 Removing the front panel assembly Front panel assembly (See Fig.1) (1) Push the detach button in the lower left part of the front panel assembly and remove the front panel assembly in the direction of the arrow.

  • Page 5: See Figs.6 And

    http://www.xiaoyu163.com 2.1.3 Removing the heat sink 3 7 63 1515 0 (See Fig.5) (1) Remove the two screws C and two screws D on the left side of the main body. Heat sink Fig.5 2.1.4 Removing the bottom cover (See Figs.6 and 7) •...

  • Page 6: Http://Www.xiaoyu163.Com

    http://www.xiaoyu163.com 2.1.6 Removing the main board 3 7 63 1515 0 Main board (See Fig.9) • Prior to performing the following procedure, remove the front panel assembly, front chassis assembly, heat sink, bottom cover and rear bracket. (1) Remove the two screws H attaching the main board. (2) Disconnect connector CN501 and remove the main board.
  • Page 7 http://www.xiaoyu163.com 2.1.8 Removing the front board 3 7 63 1515 0 (See Figs.11 to 13) • Prior to performing the following procedure, remove the front panel assembly. (1) Remove the four screws K on the back side of the front panel assembly.
  • Page 8 http://www.xiaoyu163.com 2.2 CD Mechanism Assembly 3 7 63 1515 0 2.2.1 Removing the top cover (See Figs.1 and 2) (1) Remove the two screws A on the both side of the body. (2) Lift the front side of the top cover and move the top cover backward to release the two joints a.
  • Page 9 http://www.xiaoyu163.com 2.2.2 Removing the connector board 3 7 63 1515 0 Wires (See Figs.3 to 5) CAUTION: Before disconnecting the flexible wire from the pickup, solder the short-circuit point on the pickup. No observance of this in- struction may cause damage of the pickup. (1) Remove the screw B fixing the connector board.
  • Page 10 http://www.xiaoyu163.com 2.2.3 Removing the DET switch 3 7 63 1515 0 (See Figs.6 and 7) (1) Extend the two tabs c of the feed sw. holder and pull out the switch. (2) Unsolder the DET switch wire if necessary. DET switch Connector board Pickup...
  • Page 11 http://www.xiaoyu163.com 2.2.4 Removing the chassis unit 3 7 63 1515 0 (See Figs.8 and 9) • Prior to performing the following procedure, remove the top Chassis unit cover and connector board. Suspension spring (L) Suspension spring (R) (1) Remove the two suspension springs (L) and (R) attaching the chassis unit to the frame.
  • Page 12 http://www.xiaoyu163.com 2.2.5 Removing the clamper assembly 3 7 63 1515 0 (See Figs.10 and 11) • Prior to performing the following procedure, remove the top cover. (1) Remove the clamper arm spring. Clamper arm spring (2) Move the clamper assembly in the direction of the arrow to release the two joints d.
  • Page 13 http://www.xiaoyu163.com 2.2.6 Removing the loading / feed motor assembly 3 7 63 1515 0 (See Figs.12 and 13) • Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw C and move the loading / feed motor assembly in the direction of the arrow to remove it from the chassis rivet assembly.
  • Page 14 http://www.xiaoyu163.com 2.2.7 Removing the pickup unit 3 7 63 1515 0 Pickup unit (See Figs.14 to 18) • Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw D and pull out the pu. shaft holder from the pu.
  • Page 15 http://www.xiaoyu163.com 2.2.9 Removing the trigger arm 3 7 63 1515 0 Joint k (See Figs.19 and 20) • Prior to performing the following procedure, remove the top cover, connector board and clamper unit. (1) Turn the trigger arm in the direction of the arrow to release Trigger arm the joint k and pull out upward.
  • Page 16 http://www.xiaoyu163.com 2.2.11 Removing the mode sw. / select lock arm 3 7 63 1515 0 Link plate Joint t (See Figs.22 and 23) Mode sw. • Prior to performing the following procedure, remove the top plate assembly. Select lock arm (1) Bring up the mode sw.
  • Page 17 http://www.xiaoyu163.com 2.2.12 Reassembling the mode sw. / select lock arm 3 7 63 1515 0 Select lock arm spring (See Figs.24 to 26) REFERENCE: Hook w Reverse the above removing procedure. Joint v (1) Reattach the select lock arm spring to the top plate and set Joint v the shorter end of the select lock arm spring to the hook w on the top plate.
  • Page 18 http://www.xiaoyu163.com 2.2.13 Removing the select arm R / link plate 3 7 63 1515 0 Joint c' Link plate Joint r (See Figs.27 and 28) Select arm R Joint b' • Prior to performing the following procedure, remove the top plate assembly.
  • Page 19 http://www.xiaoyu163.com 2.2.15 Removing the loading roller assembly 3 7 63 1515 0 (See Figs.31 to 33) Loading roller assembly • Prior to performing the following procedure, remove the Roller guide clamper assembly and top plate assembly. spring (1) Push inward the loading roller assembly on the gear side and detach it upward from the slot of the joint g' of the lock arm rivet assembly.
  • Page 20 http://www.xiaoyu163.com 2.2.16 Removing the loading gear 5, 6 and 7 3 7 63 1515 0 Loading gear bracket (See Figs.35 and 36) • Prior to performing the following procedure, remove the top Loading gear 6 cover, chassis unit, pickup unit and top plate assembly. (1) Remove the screw K attaching the loading gear bracket.

  • Page 21: Pull Out The Loading Gear

    http://www.xiaoyu163.com 2.2.17 Removing the gears 3 7 63 1515 0 Joint p' (See Figs.37 to 40) • Prior to performing the following procedure, remove the top Change plate cover, chassis unit, top plate assembly and pickup unit. rivet assembly • Pull out the loading gear 3. (See Fig.35.) (1) Pull out the feed gear.

  • Page 22: Http://Www.xiaoyu163.Com

    http://www.xiaoyu163.com 2.2.18 Removing the turn table / spindle motor 3 7 63 1515 0 Turn table (See Figs.41 and 42) • Prior to performing the following procedure, remove the top cover, connector board, chassis unit and clamper assembly. (1) Remove the two screws L attaching the spindle motor as- sembly through the slot of the turn table on top of the body.

  • Page 23: Adjustment

    6. Digital tester FM 87.5MHz ~ 107.9MHz 7. Tracking offset meter AM 530kHz ~ 1710 kHz 8. Test Disc JVC :CTS-1000 9. Extension cable for check EXTSH002-22P 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 24 http://www.xiaoyu163.com 3.2 Troubleshooting 3 7 63 1515 0 3.2.1 Feed section Is the voltage output at Is the wiring for IC521 Is 5V present at IC581 Check CD 9V IC521 pin u 5V or 0V? (90) ~ (100) correct? pin 6? and 5V.
  • Page 25 http://www.xiaoyu163.com 3.2.5 Signal processing section 3 7 63 1515 0 Compare the L-ch and R-ch No sound from either Is the sound output from channel. to locate the defective point. both channels (L, R)? Check the vicinity of the Normal Is 9V present at IC101 pin Q981 audio power supply.
  • Page 26 http://www.xiaoyu163.com 3.3 Maintenance of laser pickup 3 7 63 1515 0 3.4 Replacement of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens Turn off the power switch and,disconnect the power cord with a alcohol soaked cotton swab.

  • Page 27: Description Of Major Ics

    http://www.xiaoyu163.com SECTION 4 3 7 63 1515 0 Description of major ICs 4.1 HA13164A (IC961) : Regulator • Terminal layout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 • Block diagram 100u 0.1u BATT.DET OUT ANT OUT Surge Protector...
  • Page 28 http://www.xiaoyu163.com 4.2 LA47505 (IC351) : Power amp. 3 7 63 1515 0 • Terminal layout Protective circuit Stand by Switch L 13942296513 Ripple Mute Filter circuit protective circuit Muting & On Time Control Circuit u163 1-28 (No.49861) http://www.xiaoyu163.com...
  • Page 29 http://www.xiaoyu163.com • Terminal layout 3 7 63 1515 0 • Pin function Pin No. Symbol Function AC CONT1 Header of IC GND1 Power GND OUTFR- Outpur(-) for front Rch STBY Stand by input OUTFR+ Output (+) for front Rch Vcc1/2 Power input OUTRR- Output (-) for rear Rch...
  • Page 30 http://www.xiaoyu163.com 4.3 LA6579H-X (IC561) : 4-Channel bridge driver 3 7 63 1515 0 • Pin layout & Block diagram VIN1-A VIN1 VIN1_SW [H]: OP-AMP_A [L]: OP-AMP_B VIN1+A VIN1-B VCCP1 VIN1+B Signal system S-GND power supply VIN1-SW All outputs ON/OFF H : ON VO2+ MUTE MUTE...
  • Page 31 http://www.xiaoyu163.com • Pin function 3 7 63 1515 0 Pin No. Symbol Function VIN1-A CH1 input AMP_inverted input VIN1+A CH1 input AMP_non-inverted input VCCP1 CH1 and CH2 power stage power supply VO1+ Output pin(+)for channel 1 VO1- CH1 output pin (-) for channel 1 VO2+ Output pin(+)for channel 2 VO2-...
  • Page 32 http://www.xiaoyu163.com 4.4 NJM4565M-WE (IC571) : CD L.P.F. 3 7 63 1515 0 A OUTPUT A INPUT B OUTPUT A INPUT B INPUT B INPUT L 13942296513 u163 1-32 (No.49861) http://www.xiaoyu163.com...
  • Page 33 http://www.xiaoyu163.com 4.5 PT6523LQ (IC601) : LCD driver 3 7 63 1515 0 • Pin layout • Block diagram COMMON SEGMENT DRIVER & LATCH DRIVER CLOCK GENERATOR SHIFT REGISTER ADDRESS DETECTOR L 13942296513 • Piin function Pin No. Pin Name Description 1~ 52 SG1 ~ SG52 Segment Output Pins...
  • Page 34 http://www.xiaoyu163.com 4.6 TA2157FN-X(IC501):RF amp 3 7 63 1515 0 • Terminal layout • Block diagram PEAK 50 A BOTTOM PEAK L 13942296513 1.75k 240k 15pF x0.5 240k 15pF x0.5 180k 40pF RFGC (APC SW) (TE BAL) (AGC Gian) (TE BAL) VCTRLPIN Normal mode APC ON...
  • Page 35 http://www.xiaoyu163.com • Pin function 3 7 63 1515 0 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 amp 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 36 http://www.xiaoyu163.com 4.7 TC94A14FA (IC521) : DSP & DAC 3 7 63 1515 0 • Terminal layout & block daiagram Clock generator 1-bit Servo control Digital equalizer Address automatic circuit adjustment circuit Data CLV servo slicer 16 k Synchronous guarantee decoder L 13942296513 Audio out Digital...
  • Page 37 http://www.xiaoyu163.com 3 7 63 1515 0 No Symbol I/O Descroption TMAX O TMAX detection result output pin. TMAX Detection Result TMAX Output Longer than fixed period "PV " Within fixed period "HiZ" Shorter than fixed period "AV " LPFN I Inverted input pin for PLL LPF amp. LPFO O Output pin for PLL LPF amp.
  • Page 38 http://www.xiaoyu163.com 4.8 RPM6938-SV4 (IC602) : Remote sensor 3 7 63 1515 0 • Pin diagram • Block diagram Comp Rout Detector conversion trimming circuit magnetic shield L 13942296513 u163 1-38 (No.49861) http://www.xiaoyu163.com...
  • Page 39 http://www.xiaoyu163.com 4.9 TEA6320T-X (IC301) : E.volume 3 7 63 1515 0 • Pin layout OUTRR OUTLR OUTRF OUTLF MUTE Vref CD-CH TAPE TUNER • Block diagram VOLUME 2 MUTE 0 to 55 dB FUNCTION BALANCE ZERO CROSS FENDER REAR POWER DETECTOR SUPPLY VOLUME 1...
  • Page 40 http://www.xiaoyu163.com 4.10 UPD178078GF-621 (IC701) : System CPU 3 7 63 1515 0 • Pin layout • Pin function Pin No. Symbol Function No use VOL-DA I/O VOL IC communication line VOL-CLK VOL IC communication line No use LCD-DA LCD driver communication line LCD-CLK LCD driver communication line 14,15...
  • Page 41 http://www.xiaoyu163.com 3 7 63 1515 0 Pin No. Symbol Function FM E.OUT PLL error output for FM IC(VPP) Setting to write for flash RESET System reset CD mechanism switch REMOCON Remocon input 53,54 No use POWER Power control CD-ON CD power control MUTING Muting control STAGE1...
  • Page 42 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY MOBILE ENTERTAINMENT CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.49861) Printed in Japan http://www.xiaoyu163.com...

  • Page 43: Schematic Diagrams

    KD-S797 3 7 63 1515 0 SCHEMATIC DIAGRAMS CD RECEIVER KD-S797 CD-ROM No.SML200305 L 13942296513 Area Suffix UR ------------------------ Blazil COMPACT DIGITAL AUDIO Contents Block diagram Standard schematic diagrams Printed circuit boards 2-5 to 7 u163 No.49861SCH COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.

  • Page 44: Safety Precaution

    KD-S797 3 7 63 1515 0 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 adjustment or operation check.
  • Page 45 KD-S797 3 7 6 3 1 5 1 5 0 Block diagram L-CH FM/AM Front L R-CH TUNER Front R SW1,SW2,PSW J931 FMEO LINE OUT REAR L AMEO REAR R FM/AM LM,MSW FMOSC DMO,FMO IC351 SPINDLE+ IC301 CDON TRO,FOO...
  • Page 46 KD-S797 KD-S797 Standard schematic diagrams 3 7 6 3 1 5 1 5 0 Main amplifier section IC351 LA47505 QAU0281-001 C351 R351 0.33 4.7u R201 2.7K C203 R352 1/50 C352 0.33 R101 2.7K C103 1/50 0.1/50 R302 C346 2.2/50 0.22/50...
  • Page 47 KD-S797 3 7 6 3 1 5 1 5 0 CD servo control section R564 R562 FEED- 8.2K FEED+ R592 R595 FEED- FEED- C592 R563 4.7K R594 R591 C593 CD.L R593 C561 120p FEED+ FEED+ 4.7/25 R566 47/6.3 8.2K...
  • Page 48 KD-S797 KD-S797 3 7 6 3 1 5 1 5 0 LCD & Key control section EN601 IC602 QSW0793-001 RPM6938-SV4 R661 C681 0.022 CN601 R662 NNZ0087-001 ACC5V LCD1 ENC1 QLD0256-001 ENC2 LCDCE LCDDA LCDCL KEY2 KEY1 1 3 9 4 2 2 9 6 5 1 3...
  • Page 49 KD-S797 3 7 63 1515 0 Printed circuit boards Main board Forward side C964 IC961 J931 C960 C970 B961 C994 L961 R965 J771 CN901 D963 C401 C963 D994 C914 D962 B354 B962 D960 Q964 R473 C961 R474 R373 C962...
  • Page 50 KD-S797 3 7 63 1515 0 Main board Reverse side CN901 C964 J771 R914 IC961 C972 C371 C914 C772 C962 D960 C372 R476 B355 B351 B354 R961 C961 R472 C963 C401 C301 C356 C966 J931 C365 C968 C965 Q977...
  • Page 51 KD-S797 3 7 63 1515 0 Front board Forward side D625 D619 D622 S613 IC602 S617 S603 EN601 D620 R615 D607 D606 D623 S605 R605 S607 R604 R603 D621 R601 R606 R602 R649 R607 S602 S616 S614 D613 LCD1...
  • Page 52 KD-S797 3 7 63 1515 0 L 13942296513 u163 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan (No.49861SCH) 2003/05 http://www.xiaoyu163.com...

  • Page 53: Parts List

    KD-S797 3 7 63 1515 0 PARTS LIST [ KD-S797 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix UR --------------------------- Brazil L 13942296513 - Contents - Exploded view of general assembly and parts list (Block No.M1) CD mechanism assembly and parts list (Block No.MB)
  • Page 54 KD-S797 3 7 63 1515 0 Exploded view of general assembly and parts list L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 55 KD-S797 3 7 63 1515 0 General assembly Block No. [M][1][M][M]  Symbol No. Part No. Part Name Description Local --------------------- CD MECHA GE10043-210A TOP CHASSIS GE40135-001A EART PLATE GE30938-003A HEAT SINK GE30393-002A BOTTOM COVER FSMA3005-001 INSULATOR QYSDST2604Z SCREW 2.6mm x 4mm(x3)
  • Page 56 KD-S797 3 7 63 1515 0 CD mechanism assembly and parts list Block No. Grease TNG-87 TN-2001-1011 GP-501MK CFD-005Z GP-501A L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 57: Loading Gear

    KD-S797 3 7 63 1515 0 CD mechanism Block No. [M][B][M][M]  Symbol No. Part No. Part Name Description Local 30320101T FRAME 30320102T TOP COVER 30320115T DANPER F 30320116T DANPER R 303205505T CHASSIS RIVET 303205503T CHANGE P. RVT A...

  • Page 58: Electrical Parts List

    KD-S797 3 7 63 1515 0 Electrical parts list Main board Block No. [0][1][0][0]  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local NCB31HK-103X C CAPACITOR 0.01uF 50V K NCB31HK-103X C CAPACITOR 0.01uF 50V K...
  • Page 59 KD-S797 3 7 63 1515 0  Symbol No.  Symbol No. Part No. Part Name Description Local Part No. Part Name Description Local C530 NCB31EK-333X C CAPACITOR 0.033uF 25V K C976 QEKJ0JM-107Z E CAPACITOR 100uF 6.3V M C531...
  • Page 60 KD-S797 3 7 63 1515 0  Symbol No.  Symbol No. Part No. Part Name Description Local Part No. Part Name Description Local R515 NRSA63J-101X MG RESISTOR 100Ω 1/16W J R736 NRSA63J-103X MG RESISTOR 10kΩ 1/16W J R516...

  • Page 61: Front Board

    KD-S797 3 7 63 1515 0 Front board  Symbol No. Part No. Part Name Description Local Block No. [0][2][0][0] R655 NRSA63J-103X MG RESISTOR 10kΩ 1/16W J  Symbol No. Part No. Part Name Description Local R656 NRSA63J-103X MG RESISTOR 10kΩ...
  • Page 62 KD-S797 3 7 63 1515 0 Packing materials and accessories parts list Block No. A1A2 L 13942296513 A3 A4 A5 A6 A7 u163 3-10 http://www.xiaoyu163.com...
  • Page 63 KD-S797 3 7 63 1515 0 Packing and accessories Block No. [M][3][M][M]  Symbol No. Part No. Part Name Description Local -------------------- INST.BOOK -------------------- INSTALL MANUAL VKZ4027-202 PLUG NUT VKH4871-001SS MOUNT BOLT VKZ4328-001 LOCK NUT WNS5000Z WASHER GE40130-001A HOOK...

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