JVC KD-SX841R Service Manual
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JVC KD-SX841R Service Manual

JVC KD-SX841R Service Manual

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3 7 63 1515 0
SERVICE MANUAL
02
2003
49790
TE
L 13942296513
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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http://www.xiaoyu163.com
CD RECEIVER
KD-SX841R
COMPACT
TABLE OF CONTENTS
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u163
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COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
http://www.xiaoyu163.com
2 9
8
Q Q
3
6 7
1 3
1 5
E -------- Continental Europe
EX ------------ Central Europe
co
.
9 4
2 8
0 5
8
2 9
9 4
2 8
Area Suffix
m
KD-SX841R
9 9
9 9
No.49790
2003/02

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  • Page 1 KD-SX841R 3 7 63 1515 0 SERVICE MANUAL CD RECEIVER 49790 2003 KD-SX841R L 13942296513 Area Suffix E -------- Continental Europe COMPACT EX ------------ Central Europe DIGITAL AUDIO TABLE OF CONTENTS Important Safety Precautions ............1-2 Disassembly method .

  • Page 2: Important Safety Precautions

    KD-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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-SX841R 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

    Frequency Band 6. Digital tester FM 87.5MHz ~ 108.0MHz 7. Tracking offset meter MW 522kHz ~ 1620kHz 8. Test Disc JVC :CTS-1000 LW 144kHz ~ 279kHz 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-SX841R 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 KD-SX841R 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...
  • Page 26 KD-SX841R 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-SX841R SECTION 4 3 7 63 1515 0 Description of major ICs 4.1 BR24L16F-W-X (IC703) : EEPROM • Pin layout • Pin function Symbol Function Power supply. A0,A1,A2 No use connect to GND. Serial clock input. I/O Serial data I/O of slave and ward address.
  • Page 28 KD-SX841R 4.2 HA13164A (IC901) : Regulator 3 7 63 1515 0 • 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...
  • Page 29 KD-SX841R 4.3 HD74HC126FP-X (IC801) : Buffer 3 7 63 1515 0 • Pin layout • Pin function Input Output Note: H:High level L:Low level X:Irrelevant Z:Off(High-impedance) State a 3-state input • Block diagram Output Input L 13942296513 Output Sample as Load Circuit 1...
  • Page 30 KD-SX841R 4.5 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 31 KD-SX841R • 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 32 KD-SX841R 4.6 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 33 KD-SX841R • 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 34 KD-SX841R 4.7 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 35 KD-SX841R 4.8 NJM4565M-WE (IC571) : CD L.P.F. 3 7 63 1515 0 A OUTPUT A INPUT B OUTPUT A INPUT B INPUT B INPUT 4.9 RPM6938-SV4 (IC602) : Remote sensor • Pin diagram • Block diagram L 13942296513 Comp...
  • Page 36 KD-SX841R 4.10 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 37 KD-SX841R 4.11 TEA6320T-X (IC161) : 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...
  • Page 38 KD-SX841R 4.12 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 39 KD-SX841R • 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 40 KD-SX841R 4.13 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 41 KD-SX841R 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 42 KD-SX841R 4.14 UPD784215AGC198 (IC701) : Main micon 3 7 63 1515 0 • Pin layout 100 ~ 76 26 ~ 50 • Pin function Pin No. Symbol Function No use CD mechanism switch 2 CD mechanism position setting switch...
  • Page 43 KD-SX841R 3 7 63 1515 0 Pin No. Symbol Function LCD-SCK CLK output for LCD driver LCD-CE CE for LCD driver No use E2PROM-DI I2C data input E2PROM-DO I2C data output E2PROM-CLK I2C clock output 48~52 No use SD/ST...
  • Page 44 KD-SX841R 4.15 TB2118F-X (IC31) : PLL 3 7 63 1515 0 • Terminal Layout • Block diagram Constant power supply voltage Buff. ON/OFF AM CP. Phase OSC circuit Reference Counter Comparator switch FM VCO 4-bit Prescaler Swallow counter 12-bit...
  • Page 45 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 46 KD-SX841R 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.49790) Printed in Japan 200302WPC http://www.xiaoyu163.com...

  • Page 47: Schematic Diagrams

    KD-SX841R 3 7 63 1515 0 SCHEMATIC DIAGRAMS CD RECEIVER KD-SX841R CD-ROM No.SML200302 L 13942296513 Area Suffix E ----------- Continental Europe EX --------------- Central Europe Contents Block diagram Standard schematic diagrams Printed circuit boards 2-5~7 u163 No.49790SCH COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.

  • Page 48: Safety Precaution

    KD-SX841R 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 49 KD-SX841R 3 7 6 3 1 5 1 5 0 Block diagram J301 TU.LCH FM/AM LINE OUT TU.RCH TUNER FM/AM SW1,SW2,PSW FM VT, AM VT AFCK SEEK/STP FM/AM OSC MONO SEEK/STP DET OUT SD/ST LM,MSW FMO, DMO IC71 IC301...
  • Page 50 KD-SX841R KD-SX841R 3 7 6 3 1 5 1 5 0 Standard schematic diagrams Main amplifier section J301 QNN0519-001 IC301 Q321 Q331 Q341 2SD1781K/QR/-X 2SD1781K/QR/-X QAU0292-001 2SD1781K/QR/-X LA4743K Q351 2SD1781K/QR/-X QNB0100-002 R163 C186 1/50 2.2K 1/50 NOT USE 1/50...
  • Page 51 KD-SX841R 3 7 6 3 1 5 1 5 0 CD servo control section R563 4.7K R564 R562 8.2K R566 R592 R595 FEED- FEED- 8.2K R565 R594 C592 R591 C593 CD.L 2SB1322/RS/-T R593 C561 47/6.3 120P FEED+ Q561 FEED+ 4.7/25...
  • Page 52 KD-SX841R KD-SX841R 3 7 6 3 1 5 1 5 0 LCD & Key control section QSW0863-002 JS690 IC602 RPM6938-SV4 R672 R671 R673 C612 C613 C614 0.015 4.7/6.3 0.015 LCD1 DETACH VMC0335-001 QLD0254-001 ILL10V CJ601 ACC5V REMOCON R675 DIMMER...
  • Page 53 KD-SX841R 3 7 63 1515 0 Printed circuit boards Main board Forward side C903 IC901 Q331 Q321 Q351 Q341 C913 L901 C906 J801 C915 C181 C184 C904 D901 CN901 C907 C784 C244 B801 C192 R901 B802 C332 D171 B902...
  • Page 54 KD-SX841R 3 7 63 1515 0 Main board Reverse side D902 D903 R902 CN901 C313 J801 R903 IC901 C902 C903 C333 J301 Q902 C913 C904 R906 C891 C801 R173 C906 R172 C914 D901 C915 C184 R905 C907 C311 C308...
  • Page 55 KD-SX841R 3 7 63 1515 0 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 R604 D605 D604 D603 D608...
  • Page 56 KD-SX841R 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.49790SCH) 2003/02 http://www.xiaoyu163.com...

  • Page 57: Parts List

    KD-SX841R 3 7 63 1515 0 PARTS LIST [ KD-SX841R ] * 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 58 KD-SX841R 3 7 63 1515 0 Exploded view of general assembly and parts list Block No. L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 59 KD-SX841R 3 7 63 1515 0 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area --------------------- CD MECHA GE10043-210A TOP CHASSIS GE40135-001A EARTH PLATE GE30568-006A HEAT SINK GE30393-002A BOTTOM COVER INSULATOR FSMA3004-203 QYSDST2604Z...
  • Page 60 KD-SX841R 3 7 63 1515 0 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area GE30382-016A REAR BARCKET QYSDST2606Z SCREW 1 REAR BKT+REG BK SCREW 1 REAR BKT+ANT JA QYSDST2606Z QYSDST2606Z SCREW 1 REAR BKT+CD IN...
  • Page 61 KD-SX841R 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 62: Loading Gear

    KD-SX841R 3 7 63 1515 0 Parts list (CD mechanism) Block No. MBMM Item Parts number Parts name Q'ty Description Area 30320101T FRAME 30320102T TOP COVER 30320115T DANPER F 30320116T DANPER R 303205505T CHASSIS RIVET CHANGE P. RVT A...

  • Page 63: Loading Gear

    KD-SX841R Parts list (CD mechanism) 3 7 63 1515 0 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 30321107T LOADING GEAR 7...
  • Page 64 KD-SX841R 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 184 QEKJ1HM-105Z E CAPACITOR 1.0MF 20% 50V...
  • Page 65 KD-SX841R 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 537 NCB31EK-473X C CAPACITOR C 908 NCB31CK-104X C CAPACITOR C 538...
  • Page 66 KD-SX841R 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 2SD601A/R/-X TRANSISTOR R 81 NRSA63J-103X MG RESISTOR UN2111-X TRANSISTOR R 82...
  • Page 67 KD-SX841R 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 R 535 NRSA63J-472X MG RESISTOR R 736 NRSA63J-473X MG RESISTOR R 536...
  • Page 68 KD-SX841R 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 R 638 NRSA02J-391X MG RESISTOR D 616 SML-310VT/JK/-X R 639 NRSA02J-391X...
  • Page 69 KD-SX841R 3 7 63 1515 0 < M E M O > L 13942296513 u163 3-13 http://www.xiaoyu163.com...
  • Page 70 KD-SX841R 3 7 63 1515 0 Packing materials and accessories parts list Block No. Block No. A2~A7 L 13942296513 KIT:A9~A13 u163 3-14 http://www.xiaoyu163.com...
  • Page 71 KD-SX841R 3 7 63 1515 0 Parts list (Packing) Block No. M3MM Item Description Parts number Parts name Q'ty Area FSPG4002-001 POLY BAG 2 INST.BOOK QPA00801205 POLY BAG FSYH4036-068 SHEET 1 MIRAMA SHEET QPA01003003 POLY BAG POLY BAG QPC03004315P...

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