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JVC KD-SX60WT Service Manual
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JVC KD-SX60WT Service Manual

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SERVICE MANUAL
6
2003
49868
KD-SX60WT,KD-SX50M
COMPACT
DIGITAL AUDIO
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
5
TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
6
DESCRIPTION OF MAJOR ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
CD RECEIVER

TABLE OF CONTENTS

KD-SX60WT
180W
K D-SX60WT
KD-SX50M
180W
K D-SX50M
Area Suffix
J --------- Northern America
No.49868
2003/6

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  • Page 1: Table Of Contents

    SERVICE MANUAL CD RECEIVER 49868 2003 KD-SX60WT,KD-SX50M KD-SX60WT 180W K D-SX60WT KD-SX50M 180W K D-SX50M COMPACT DIGITAL AUDIO Area Suffix J --------- Northern America TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION AUDIO AMPLIFIER Maximum Power Output Front 45 W per channel SECTION Rear 45 W per channel 17 W per channel into 4 Ω, 40 Continuous Power Output (RMS) Front Hz to 20 000 Hz at no more than 0.8% total harmonic distortion.

  • Page 3: Precaution

    SECTION 1 PRECAUTION 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 4 Preventing 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. 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 CD players.

  • Page 5: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.49868)1-5...

  • Page 6: Disassembly

    SECTION 3 DISASSEMBLY Main body 3.1.1 Removing the front panel assembly (See Fig.1) (1) Press the release button and remove the front panel as- sembly. Front panel assembly Release button Fig.1 3.1.2 Removing the bottom cover (See Figs.2) (1) Turn over the main body and release the two joints a, two joints b and joint c.
  • Page 7 3.1.4 Removing the heat sink (See Fig.4) • Prior to performing the following procedure, remove the front panel assembly as required. (1) Remove the two screws B and screw C on the left side of the main body. Heat sink Fig.4 3.1.5 Removing the rear bracket (See Fig.5)
  • Page 8 3.1.7 Removing the CD mechanism assembly (See Fig.7) • Prior to performing the following procedure, remove the front panel assembly, bottom cover, front chassis assembly, heat sink, rear bracket and main board. (1) Remove the three screws H attaching the CD mechanism assembly to the top chassis.
  • Page 9 CD Mechanism Assembly 3.2.1 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. Top cover Joints a Fig.1...
  • Page 10 3.2.2 Removing the connector board 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. (2) Solder the short-circuit point on the connector board.
  • Page 11 3.2.3 Removing the DET switch (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 Fig.6 Tab c DET switch DET switch wire Tab c...
  • Page 12 3.2.4 Removing the chassis unit (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 13 3.2.5 Removing the clamper assembly (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 14 3.2.6 Removing the loading / feed motor assembly (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 15 3.2.7 Removing the pickup unit 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 Part e the pu.
  • Page 16 3.2.9 Removing the trigger arm 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 17 3.2.11 Removing the mode sw. / select lock arm 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. to release from the link plate (joint t) and turn in the direction of the arrow to release the joint u.
  • Page 18 3.2.12 Reassembling the mode sw. / select lock arm Select lock arm spring (See Figs.24 to 26) Hook w REFERENCE: 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 19 3.2.13 Removing the select arm R / link plate Link plate Joint r Joint c' (See Figs.27 and 28) Select arm R Joint b' • Prior to performing the following procedure, remove the top plate assembly. (1) Bring up the select arm R to release from the link plate (joint a') and turn as shown in the figure to release the two Joint b' joints b' and joint c'.
  • Page 20 3.2.15 Removing the loading roller assembly Loading roller assembly (See Figs.31 to 33) • 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 21 3.2.16 Removing the loading gear 5, 6 and 7 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. The loading gear 6 and 7 come off the loading gear brack- (2) Pull out the loading gear 5.
  • Page 22 3.2.17 Removing the gears 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 23 3.2.18 Removing the turn table / spindle motor 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 24: Adjustment

    Exclusive dummy load should be used for AM,and FM. For FM (7) Tracking offset meter dummy load,there is a loss of 6dB between SSG output and (8) Test Disc JVC :CTS-1000 antenna input.The loss of 6dB need not be considered since (9) Extension cable for check direct reading of figures are applied in this working standard.
  • Page 25 Maintenance of laser pickup 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 from the ac outlet. 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 26: Trouble Shooting

    SECTION 5 TROUBLE SHOOTING Feed section Is the voltage output at Is the wiring for IC521 Is 5V present at IC581 Check CD 9V IC521 pin 40 5V or 0V? (90) (100) correct? pin 6? and 5V. Check the vicinity of IC521.
  • Page 27 Tracking section When the disc is rotated at first: Check the circuit in the Check the pickup and vicinity of IC501 pins its connections. 2 12. Approx. 1.2 V Is the tracking error signal output at TP3? Check IC521. Signal processing section Is the sound output from No sound from either Compare the L-ch and...

  • Page 28: Description Of Major Ics

    SECTION 6 DESCRIPTION OF MAJOR ICs HA13164A (IC911) : 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 0.1u EXT OUT COMPOUT BIAS...
  • Page 29 HA17558F (IC571) : Ope. amp. • Pin layout & Block diagram MM74HC126SJ-X (IC691) : 3-state Quad buffer • Pin layout & Block diagram • Truth table INPUT OUTPUT H : High level L : Low level X : Don't care Z : Hi-Z (No.49868)1-29...
  • Page 30 TEA6320T-X (IC301) : E.volume • Pin layout OUTRR OUTLR OUTRF OUTLF Vref MUTE CD-CH TAPE TUNER • Block diagram VOLUME 2 MUTE 0 to 55 dB FUNCTION BALANCE ZERO CROSS FENDER REAR POWER DETECTOR SUPPLY VOLUME 1 BASS TREBLE +20 to -31 dB VOLUME 2 LEFT LEFT...
  • Page 31 LA4743K (IC941) : Power amp. • 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 ST ON...
  • Page 32 • Pin layout • Pin function Pin No. Symbol Function Pin No. Symbol Function Header of IC FLIN Front Lch input Power GND RLIN Rear Lch input Outpur(-) for front Rch ONTIME Power on time control STDBY Stand by input Output (+) for rear Lch Output (+) for front Rch Power GND...
  • Page 33 LA6579H-X (IC561) : 4-Channel bridge driver • 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 L : OFF VO2- VREFIN Power system...
  • Page 34 • Pin function 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- Output pin(-)for channel 2 VO3+...
  • Page 35 PT6523LQ (IC601) : LCD driver • Pin layout • Block diagram COMMON SEGMENT DRIVER & LATCH DRIVER CLOCK GENERATOR SHIFT REGISTER ADDRESS DETECTOR • Piin function Pin No. Pin Name Description 1~ 52 SG1 ~ SG52 Segment Output Pins 53~55 COM1 ~ COM3 Common Driver Output Pins Power Supply...
  • Page 36 RPM6938-SV4 (IC602) : Remote sensor • Pin diagram • Block diagram Comp Rout Detector conversion trimming circuit magnetic shield 1-36 (No.49868)
  • Page 37 TA2157FN-X (IC601):RF amp • Terminal layout • Block diagram PEAK 50 A BOTTOM PEAK 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 -50% +12dB (0dB) Normal mode APC ON +6dB...
  • Page 38 • Pin function 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 39 6.10 TC94A14FA (IC541) : DSP & DAC • 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 Audio out Digital circuit output Micro- controller Sub code interface...
  • Page 40 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 41 6.11 UPD178078GF-622 (IC701) : System CPU • Pin Layout • Pin function Pin No. Symbol Function NO USE OUTPUT L BUS-INT JVC BUS COMMUNICATION LINE BUS-SI J-BUS data input BUS-SO J-BUS data output BUS-SCK J-BUS clock input/output 6 to8 NO USE...
  • Page 42 Pin No. Symbol Function IF COUNT INPUT VDDPLL OSC INPUT FM AM OSC INPUT NO USE GNDPLL AM E.OUT PLL ERROR OUTPUT FOR AM FM E,OUT PLL ERROR OUTPUT FOR FM IC(VPP) SETTING TO WRITE FOR FLASH RESET SYSTEM RESETCD MECHA REMOCON REMOCON INPUT 53,54...
  • Page 43 KD-SX60WT,KD-SX50M 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 44 KD-SX60WT,KD-SX50M Block diagram TU.LCH FM/AM TU.RCH TUNER CJ321 SW1,SW2,PSW LINE OUT MONO AMEO LM,MSW FM/AM FMEO TRO,FOO IC302 SEEK/STP SPINDLE+ BUS0,BUS1 IC161 DMO,FMO IC521 FM.OSC OUTFL POWER SPINDLE- BUS2,BUS3 E.VOL POSITION SET IC561 IF.C OUTFR FEED+ BUCK,CCE SWITCH & FEED- S.METER...
  • Page 45 KD-SX60WT,KD-SX50M KD-SX60WT,KD-SX50M Standard schematic diagrams Main amplifier section Q976 UN2111-X D976 1SS355-X R331 R332 QAU0281-001 Q977 MUTE UN2111-X 2.2K C331 R335 Q331 2SD1781K/QR/-X 100P QNB0100-002 2.2K R325 Q321 C321 2SD1781K/QR/-X 100P MUTE.CONT R321 R322 4.7u R351 R352 D331 CJ321 R355 2.2K...
  • Page 46 KD-SX60WT,KD-SX50M CD servo control section R564 R562 8.2K R572 R575 C572 C573 R563 4.7K R574 R571 CD.L R573 C561 120P 4.7/25 47/10 R566 FEED- 8.2K( 1/10) FEED+ Q561 FEED- FEED- 2SB1322/RS/-T C574 C571 820P 820P FEED+ FEED+ C581 C584 SPINDLE-...
  • Page 47 KD-SX60WT,KD-SX50M KD-SX60WT,KD-SX50M LCD & Key control section QSW0793-001 JS690 IC602 RPM6938-SV4 R672 R671 R673 0.015 0.015 C612 C614 C613 4.7/6.3 QLD0253-002 VMC0335-001 ILL_10V ILL_10V ILL_10V ILL_10V ILL_10V ILL_10V ILL_10V ILL_10V ILL_10V CJ601 REMOCON ENC1 ENC2 R675 DIMMER LCD.CL LCD.DA LCD.CE...
  • Page 48 KD-SX60WT,KD-SX50M Printed circuit boards Main board Forward side C901 IC901 CJ321 R351 Q351 Q341 Q331 L901 CJ322 CN901 Q321 B302 C303 D901 C316 C304 B303 R902 C315 C913 R331 R341 R901 C903 R325 C906 R335 C904 R193 D906 C915 R194...
  • Page 49 KD-SX60WT,KD-SX50M Main board Reverse side C901 IC901 C333 L901 C903 CJ322 CN901 C913 C904 C902 D901 C300 C891 R901 D903 C906 R332 C341 C351 IC302 R342 R352 R891 C910 R892 D331 C915 C909 C905 R321 C908 R185 Q891 R967 R893...
  • Page 50 KD-SX60WT,KD-SX50M Front board Forward side D622 D618 D619 S616 S613 S617 S601 JS690 LCD1 R601 D731 R646 R631 D609 S618 D610 R647 D732 R610 R608 S612 R602 S602 S610 D605 R604 D604 D608 D607 D606 D603 S607 R605 S604 S605...
  • Page 51 PARTS LIST [ KD-SX60WT ] [ KD-SX50M ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix J -------------- Northern America - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 4 CD mechanism assembly and parts list (Block No.MB)
  • Page 52 Exploded view of general assembly and parts list Block No.
  • Page 53 General assembly Block No. [M][1][M][M] Symbol No. Part No. Part Name Description Local GE10043-210A TOP CHASSIS GE30942-002A TOP SHEET GE40135-001A EARTH PLATE GE30938-003A SIDE PANEL GE30393-002A BOTTOM COVER FSMA3004-203 INSULATOR QYSDST2604Z SCREW 2.6mm x 4mm(x3) FSKZ4005-001 SCREW (x2) QYSDST2606Z SCREW 2.6mm x 6mm(x2) QYSDST2604Z SCREW...
  • Page 54 CD mechanism assembly and parts list Block No. Grease TN-2001-1011 TNG-87 GP-501MK CFD-005Z GP-501A...
  • Page 55 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 303205301T CLAMPER ASS'Y 303205302T SPINDLE MOTOR A 30320502T CLAMPER ARM 30320503T CHANGE GEAR SPG...
  • Page 56 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-102X C CAPACITOR 1000pF 50V K QEKJ1AM-227Z E CAPACITOR 220uF 10V M IC161 TEA6320T-X NDC31HJ-470X C CAPACITOR 47pF 50V J IC302 LA4743K...
  • Page 57 Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local C509 QEKJ1AM-107Z E CAPACITOR 100uF 10V M C914 NCB31EK-104X C CAPACITOR 0.1uF 25V K C510 NCB31CK-104X C CAPACITOR 0.1uF 16V K C975 NCB31EK-823X C CAPACITOR 0.082uF 25V K C511 NCB31CK-104X...
  • Page 58 Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R515 NRSA63J-101X MG RESISTOR 100Ω 1/16W J R732 NRSA63J-103X MG RESISTOR 10kΩ 1/16W J R516 NRSA63J-821X MG RESISTOR 820Ω 1/16W J R733 NRSA63J-473X MG RESISTOR 47kΩ...
  • Page 59 Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local D614 LNJ308G81/1-3/X S608 NSW0124-001X TACT SW D615 LNJ308G81/1-3/X S609 NSW0124-001X TACT SW D616 LNJ308G81/1-3/X S610 NSW0124-001X TACT SW D617 LNJ308G81/1-3/X S611 NSW0124-001X TACT SW D618 LNJ308G81/1-3/X S612...
  • Page 60 Packing materials and accessories parts list Block No. A6 A7 A2 A3 KIT : A8 A9 A10 3-10...
  • Page 61 Packing and accessories Block No. [M][3][M][M] Symbol No. Part No. Part Name Description Local GET0157-001A INST BOOK ENG FRE SPA GET0157-002A INSTALL MANUAL ENG FRE SPA GET0153-001A CAUTION SHEET LVT0717-001B TROUBLE SHEET(C BT-51018-3 WARRANTY CARD BT-52006-2 WARRANTY CARD BT-51028-2 J=REGIST CARD VKZ4027-202 PLUG NUT VKH4871-001SS...

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