JVC KD-S743R Service Manual
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JVC KD-S743R Service Manual

JVC KD-S743R Service Manual

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3 7 63 1515 0
SERVICE MANUAL
02
2003
49810
KD-S743R/KD-S741R
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
www
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http://www.xiaoyu163.com
CD RECEIVER
TP/PTY
SEL
DISP
TABLE OF CONTENTS
x
ao
u163
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i
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
http://www.xiaoyu163.com
2 9
8
7
8
MO
9
10
11
RPT
12
RND
MODE
Q Q
3
6 7
1 3
1 5
E -------- Continental Europe
EX ------------ Central Europe
co
.
KD-S743R/KD-S741R
9 4
2 8
FM
CD
SSM
AM
SCM
0 5
8
2 9
9 4
2 8
Area Suffix
m
9 9
9 9
No.49810
2003/02

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Summary of Contents for JVC KD-S743R

  • Page 1 KD-S743R/KD-S741R 3 7 63 1515 0 SERVICE MANUAL CD RECEIVER 49810 2003 KD-S743R/KD-S741R TP/PTY DISP MODE L 13942296513 Area Suffix COMPACT E -------- Continental Europe EX ------------ Central Europe DIGITAL AUDIO TABLE OF CONTENTS Important Safety Precautions ............1-2 Disassembly method .

  • Page 2: Important Safety Precautions

    KD-S743R/KD-S741R 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.
  • Page 3 KD-S743R/KD-S741R 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.

  • Page 4: Disassembly Method

    KD-S743R/KD-S741R 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 right part of the front panel assembly and remove the front panel assembly in the direction of the arrow.
  • Page 5 KD-S743R/KD-S741R 2.1.3 Removing the heat sink 3 7 63 1515 0 (See Fig.4) (1) Remove the two screws B and two screws C on the left side of the main body. Heat sink Fig.4 2.1.4 Removing the bottom cover (See Figs.5 and 6)
  • Page 6 KD-S743R/KD-S741R 2.1.6 Removing the main board 3 7 63 1515 0 Main board (See Fig.8) • 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 G attaching the main board.
  • Page 7 KD-S743R/KD-S741R 2.1.8 Removing the front board 3 7 63 1515 0 (See Figs.10 to 12) • Prior to performing the following procedure, remove the front panel assembly. (1) Remove the four screws J on the back side of the front panel assembly.
  • Page 8 KD-S743R/KD-S741R 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 KD-S743R/KD-S741R 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.
  • Page 10 KD-S743R/KD-S741R 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.
  • Page 11 KD-S743R/KD-S741R 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 KD-S743R/KD-S741R 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 KD-S743R/KD-S741R 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 KD-S743R/KD-S741R 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 KD-S743R/KD-S741R 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 KD-S743R/KD-S741R 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 KD-S743R/KD-S741R 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...
  • Page 18 KD-S743R/KD-S741R 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 KD-S743R/KD-S741R 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 KD-S743R/KD-S741R 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.

  • Page 21: Pull Out The Loading Gear

    KD-S743R/KD-S741R 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 •...

  • Page 22: Http://Www.xiaoyu163.Com

    KD-S743R/KD-S741R 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

    FM 87.5MHz~108.0MHz 6. Digital tester MW 522kHz~1620kHz 7. Tracking offset meter 144kHz~279kHz 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 KD-S743R/KD-S741R 3.2 Troubleshooting 3 7 63 1515 0 3.2.1 Feed section Is the wiring for IC521 Is the voltage output at Is 5V present at IC581 Check CD 9V (90) ~ (100) correct? IC521 pin u 5V or 0V? pin 6? and 5V.
  • Page 25 KD-S743R/KD-S741R 3.2.5 Signal processing section 3 7 63 1515 0 No sound from either Compare the L-ch and R-ch Is the sound output from to locate the defective point. channel. both channels (L, R)? Normal Check the vicinity of the Is 9V present at IC101 pin Q981 audio power supply.
  • Page 26 KD-S743R/KD-S741R 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

    KD-S743R/KD-S741R SECTION 4 3 7 63 1515 0 Description of major ICs 4.1 HA13164A (IC901) : Regulator • Terminal layout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 • Block diagram 100u 0.1u...

  • Page 28: Table Of Contents

    KD-S743R/KD-S741R 4.2 LA4743K (IC301) : Power amp. 3 7 63 1515 0 • 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...

  • Page 29: Tab

    KD-S743R/KD-S741R • Pin layout 3 7 63 1515 0 • 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...
  • Page 30 KD-S743R/KD-S741R 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...
  • Page 31 KD-S743R/KD-S741R • 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...
  • Page 32 KD-S743R/KD-S741R 4.4 LC75823W (IC601) : LCD driver 3 7 63 1515 0 • Pin Layout 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 •...
  • Page 33 KD-S743R/KD-S741R 4.5 SAA6579T-X(IC71):RDS detecter 3 7 63 1515 0 • Pin layout QUAL DATA Vref OSCO OSCI TEST SCOUT MODE • Block diagram ANTI- 57 kHz OSCILLATOR QUALITY BIT RECONSTRUCTION ALIASING BAND PASS GENERATOR FILTER FILTER (8th ORDER) DIVIDER...
  • Page 34 KD-S743R/KD-S741R 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)

  • Page 35: Vcc

    KD-S743R/KD-S741R • 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...
  • Page 36 KD-S743R/KD-S741R 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...
  • Page 37 KD-S743R/KD-S741R 3 7 63 1515 0 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.

  • Page 38: Mute

    KD-S743R/KD-S741R 4.8 TEA6320T-X (IC161) : E.volume 3 7 63 1515 0 • 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...
  • Page 39 KD-S743R/KD-S741R 4.9 NJM4565M-WE (IC571) : CD L.P.F. 3 7 63 1515 0 A OUTPUT B OUTPUT A INPUT A INPUT B INPUT B INPUT L 13942296513 u163 (No.49810)1-39 http://www.xiaoyu163.com...

  • Page 40: Out

    KD-S743R/KD-S741R 4.10 UPD178078GF-593 (IC701) : System CPU 3 7 63 1515 0 • Pin layout • Pin function Pin No. Symbol Function STEERING REMOTE Steering remote input No use VOL-DA I/O VOL IC communication line VOL-CLK VOL IC communication line...
  • Page 41 KD-S743R/KD-S741R 3 7 63 1515 0 Pin No. Symbol Function RESET System reset CD mecha switch REMOCON Remocon input No use TEL MUTING Tel muting input POWER Power control CD-ON CD power control MUTING Muting control 58~67 No use...
  • Page 42 KD-S743R/KD-S741R 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 (No.49810) Printed in Japan 200302WPC http://www.xiaoyu163.com...
  • Page 43 KD-S743R/KD-S741R 3 7 63 1515 0 SCHEMATIC DIAGRAMS CD RECEIVER KD-S743R / KD-S741R CD-ROM No.SML200302 Area Suffix E ----------- Continental Europe EX --------------- Central Europe L 13942296513 TP/PTY DISP MODE COMPACT DIGITAL AUDIO Model BODY COLOR KD-S743R SILVER KD-S741R...
  • Page 44 KD-S743R/KD-S741R 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-S743R/KD-S741R 3 7 6 3 1 5 1 5 0 Block diagram J301 L-CH FM/AM LINE OUT R-CH REAR L TUNER REAR R SW1,SW2 IC71 LM,MSW DMO,FMO IC301 SPINDLE+ IC161 BUS 0~3 TRO,FOO IC521 DETECTER OUT LF POWER SPINDLE-...
  • Page 46 KD-S743R/KD-S741R KD-S743R/KD-S741R 3 7 6 3 1 5 1 5 0 Standard schematic diagrams Main amplifier section NOT USE J301 QNN0519-001 R332 R342 100( 1/10W) R322 R352 100( 1/10W) 100( 1/10W) 100( 1/10W) IC301 QAU0292-001 LA4743K QNB0100-002 220P 4.7u...
  • Page 47 KD-S743R/KD-S741R 3 7 6 3 1 5 1 5 0 CD servo control section 4.7k R563 20k( 1/10W) R566 R564 R562 8.2k R592 R595 FEED- 8.2k( 1/10W) C592 FEED- R565 R594 C593 R591 CD.L C561 R593 47/6.3 120p FEED+ FEED+ 4.7/25...
  • Page 48 KD-S743R/KD-S741R KD-S743R/KD-S741R 3 7 6 3 1 5 1 5 0 LCD & Key control section IC602 RPM6938-SV4 C611 C612 0.012 4.7/6.3 UDZS5.1B-X CJ601 D644 VMC0335-001 R661 LCD1 QLD0210-002 ILL10V ACC5V REMOCON Main amplifier section CN701 BUS3 LCDCL LCDDA...
  • Page 49 KD-S743R/KD-S741R 3 7 63 1515 0 Printed circuit boards Main board Forward side C903 J301 IC901 Q341 Q321 D901 J801 L901 CP961 C905 C907 R901 R782 R781 D782 C317 C315 R323 C314 Q782 C316 C783 C784 C904 C782 C313...
  • Page 50 KD-S743R/KD-S741R 3 7 63 1515 0 Main board Reverse side R904 C903 R905 C344 D903 C907 D901 D902 C333 C310 C311 C308 C309 R903 R902 C905 D783 C904 R901 C784 R167 R168 D904 R191 C305 C193 C177 C178 R177...
  • Page 51 KD-S743R/KD-S741R 3 7 63 1515 0 Front board Forward side D620 S619 D615 R616 R611 S604 D603 R610 R617 D601 S620 S603 R604 D616 D604 R638 R602 D731 R639 R615 R601 R614 S602 S607 R606 S605 D732 R637 S617...
  • Page 52 KD-S743R/KD-S741R 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.49810SCH) 2003/02 http://www.xiaoyu163.com...
  • Page 53 KD-S743R/KD-S741R 3 7 63 1515 0 PARTS LIST [ KD-S743R/KD-S741R] * All printed circuit boards and its assemblies are not available as service parts. Area suffix E------------ Continental Europe EX --------------- Central Europe L 13942296513 - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1)
  • Page 54 KD-S743R/KD-S741R 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 55 KD-S743R/KD-S741R 3 7 63 1515 0 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area --------------------- CD MECHA GE10043-205A TOP CHASSIS EARTH PLATE GE40135-001A GE30568-006A HEAT SINK GE30393-002A BOTTOM COVER FSMA3004-203 INSULATOR QYSDST2604Z...
  • Page 56 KD-S743R/KD-S741R 3 7 63 1515 0 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area QNZ0442-001 LCD CONNECTOR GE30382-018A REAR BRACKET GE30382-001A REAR BRACKET 1 KD-S743 QYSDST2606Z SCREW 1 REAR BKT+REG BK QYSDST2606Z...
  • Page 57 KD-S743R/KD-S741R 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 58: Loading Gear

    KD-S743R/KD-S741R 3 7 63 1515 0 Parts list (CD mechanism) Block No. MBMM Item Description Parts number Parts name Q'ty Area 30320101T FRAME 30320102T TOP COVER 30320115T DANPER F 30320116T DANPER R 303205505T CHASSIS RIVET 303205503T CHANGE P. RVT A...

  • Page 59: Loading Gear

    KD-S743R/KD-S741R 3 7 63 1515 0 Parts list (CD mechanism) Block No. MBMM Item Description Parts number Parts name Q'ty Area 30321103T LOADING GEAR 3 30321104T LOADING GEAR 4 30321105T LOADING GEAR 5 30321106T LOADING GEAR 6 LOADING GEAR 7...
  • Page 60 KD-S743R/KD-S741R 3 7 63 1515 0 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area NCB31EK-473X C CAPACITOR C 310 NCB31EK-104X C CAPACITOR QEKJ1HM-474Z E CAPACITOR .47MF 20% 50V...
  • Page 61 KD-S743R/KD-S741R 3 7 63 1515 0 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 561 QEKJ0JM-476Z E CAPACITOR 47MF 20% 6.3V D 706 UDZS6.2B-X...
  • Page 62 KD-S743R/KD-S741R 3 7 63 1515 0 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area NRSA63J-332X MG RESISTOR R 513 NRSA63J-102X MG RESISTOR R 10 NRS181J-8R2X...
  • Page 63 KD-S743R/KD-S741R 3 7 63 1515 0 Electrical parts list (Main board) Block No. 01 Item Remarks Parts number Parts name Area R 725 NRSA63J-473X MG RESISTOR R 726 NRSA63J-473X MG RESISTOR R 727 NRSA63J-103X MG RESISTOR R 728 NRSA63J-473X...
  • Page 64 KD-S743R/KD-S741R 3 7 63 1515 0 Electrical parts list (Front board) Block No. 02 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 601 NCB31HK-223X C CAPACITOR R 654 NRSA63J-103X MG RESISTOR C 602...
  • Page 65 KD-S743R/KD-S741R 3 7 63 1515 0 < M E M O > L 13942296513 u163 3-13 http://www.xiaoyu163.com...
  • Page 66 KD-S743R/KD-S741R 3 7 63 1515 0 Packing materials and accessories parts list Block No. Block No. A2~A8 L 13942296513 KIT : A9~A13 u163 3-14 http://www.xiaoyu163.com...
  • Page 67 KD-S743R/KD-S741R 3 7 63 1515 0 Parts list (Packing) Block No. M3MM Item Parts number Parts name Q'ty Description Area FSPG4002-001 POLY BAG QPA00801205 POLY BAG QPA01003003 POLY BAG 1 FOR HARD CASE FSYH4036-068 SHEET QPC03004315P POLY BAG 1 SET(260X440X0.0...

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