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JVC KD-SX878R Service Manual

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KD-SX878R
KD-S777R
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3 7 6 3 1 5 1 5 0
T E
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1 3 9 4 2 2 9 6 5 1 3
w w w
VICTOR COMPANY OF JAPAN, LIMITED
MOBILE ELECTRONICS DIVISION,10-1,1Chome,Ohwatari-machi,maebashi-city,Japan
(No.49542)
"无奇不有"电路图网 http://www.xiaoyu163.com
x
a o
y
.
i
http://www.xiaoyu163.com
8
SERVICE MANUAL
Q
Q
3
7
6
3
DIGITAL AUDIO
Contents
Instructions
Flow of functional
u 1 6 3
operation unit TOC read
.
Printed in Japan
200002(M)
2
4
9
9
8
CD RECEIVER
KD-SX878R
KD-S777R
KD-SX878R
40Wx4
DISP
RND
RDS
TP
RPT
PTY
7
8
9
10
11
12
DAB
SCM
CD
-CH
FM/AM
KD-S777R
1
5
1
5
0
8
9
2
4
40Wx4
DISP
MO
RND
RDS
TP
RPT
PTY
7
8
9
10
11
12
SCM
AM
FM
COMPACT
Comparison table between the KD-SX878R and KD-S777R
Item
KD-SX878R
Connection to DAB
O
CD changer
O
Remote control unit
Option
1-2
1-3
1-4~
2-1
2-2
2-7
m
c o
2-8
COPYRIGHT
2000 VICTOR COMPANY OF JAPAN, LTD.
KD-SX878R
KD-S777R
2
9
9
Area Suffix
E-------Continental Europe
MO
SSM
CD
CD
9
8
2
9
9
SSM
CD
KD-S777R
X
X
Option
2-10
2-10
2-11
2-30
2-31
2-34
3-1~
No.49542
Feb. 2000

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  • Page 1: Table Of Contents

    40Wx4 DISP FM/AM KD-S777R 1 3 9 4 2 2 9 6 5 1 3 40Wx4 DISP COMPACT DIGITAL AUDIO Comparison table between the KD-SX878R and KD-S777R Item KD-SX878R KD-S777R Connection to DAB CD changer Remote control unit Option Option...

  • Page 2: Safety Precaution

    “无奇不有”电路图网 http://www.xiaoyu163.com Safety precaution http://www.xiaoyu163.com ! CAUTION Burrs formed during molding may be left over on some parts of the chassis. Therefore, 3 7 63 1515 0 pay attention to such burrs in the case of preforming repair of this system. ! CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.

  • Page 3: Preventing Static Electricity

    “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 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. 2.About the earth processing for the destruction prevention by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.

  • Page 4: Location Of Main Parts

    “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 Location of main parts Control unit Display Front board Antenna Changer control jack Main unit connector ISO connector RCA jack Main board Power IC L 13942296513 Tuner pack Main board assembly Connector to front board CD mechanism Loading motor Mechanism relay board...

  • Page 5: Disassembly Method

    “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 Disassembly method Removing the front chassis (See Fig.1) 1. Insert a screwdriver to the joints a on the side of the front chassis and two joints b on the right side, then detach the front chassis toward the front side.
  • Page 6 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 Main amplifier board CN501 Removing the main amplifier board assembly (See Fig.4 and 5) Remove the front chassis. Remove the bottom cover. Remove the two screws B attaching the main amplifier board assembly on the bottom of the body. Remove the seven screws C attaching the main amplifier board assembly on the back of the body.
  • Page 7 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 Damper bracket <CD mechanism section> CD mechanism ass’y Prior to disassembling the CD mechanism, remove the following parts. The front panel unit and the front chassis The heat sink The bottom cover The main amplifier board CD mechanism control board...
  • Page 8 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 Removing the loading motor Loading motor (See Fig.3 to 5) Prior to performing the following procedure, remove the CD mechanism control board. Belt Remove the two springs g attaching the CD mechanism ass’y and the front bracket.
  • Page 9 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 Removing the feed motor ass’y Part j FD screw (See Fig.10) Feed motor ass’y Prior to performing the following procedure, remove the CD mechanism control board, the front bracket Part k (loading motor) and the CD mechanism ass’y. Remove the two screws F and the feed motor ass’y.

  • Page 10: Adjustment Method

    Loudness : OFF 3.FM Standard signal generator 4.Stereo modulator 5.Electric voltmeter 6.Digital tester Frequency Band 7.Tracking offset meter 8.Test Disc JVC : CTS-1000 1~3 87.5MHz~108.0MHz 9.Extension cable for check 522kHz~1620kHz 144kHz~279kHz EXTGS004-26P Dummy load Exclusive dummy load should be used for AM,and FM.
  • Page 11 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 Flow of Functional Operation Unit TOC Read Power ON When the laser diode correctly Set Function CD When the pickup correctly moves emits to the inner area of the disc Microprocessor $82 $81 Microprocessor Disc inserted commands...
  • Page 12 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 Feed section Is the voltage output at Is the wiring for IC541 Is 5V present at IC501 IC541 pin "53" 5V or 0V? (90)~(100) correct? pin "20"? Check CD 9V Check the vicinity of and 5V.

  • Page 13: Maintenance Of Laser Pickup

    “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 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 14: Description Of Major Ics

    “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 Description of major ICs LC75823E (IC691) : LCD Driver 1. Pin Layout & Symbol 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 L 13942296513 2.
  • Page 15 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 UPD178076GF (IC701): SYSTEM CPU 1.Terminal layout 100 ~ 81 31 ~ 50 2.Block diagram TO0/VTR-CONT NC,JBUS-INT,SW1, 16-bit TIMER/ PORT 0 TI00/POWER REMOCON,PS1,PS2, EVENT COUNTER DETACH,NC TI01/CD-ON TI50/MUTE PORT 1 KEY0,KEY1,KEY2,LEVEL, 8-bit TIMER/ SM,SQ, EVENT COUNTER 0 TO50/NC...
  • Page 16 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 3.Pin function UPD178076GF(1/2) FUNCTION Symbol Non connection JBUS-INT JVC BUS COMMUNICATION LINE JBUS-SI JVC BUS COMMUNICATION LINE JBUS-SO JVC BUS COMMUNICATION LINE JBUS-SCK JVC BUS COMMUNICATION LINE Non connection Non connection VOL-DAI...
  • Page 17 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 UPD178076GF(2/2) FUNCTION Symbol CD MECHA SW REMOCON REMOCON INPUT Non connection TEL-MUTING TEL MUTING DETECT INPUT POWER POWER CONT. CD-ON CD POWER CONT. MUTE MUTE CONT STAGE 1 SW FOR SX878 AND S777 BUZZER SW FOR USA AND Japan STAGE 2...
  • Page 18 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 TA2109F-X (IC521) : RF amp. 1. Pin layout 2. Block diagram 15k ohm 30k ohm 7.67k ohm 15k ohm 10k ohm SBAD 10k ohm 20uA 50k ohm 30k ohm 20pF 36pF 10k ohm 10k ohm 21k ohm 29k ohm 2VRO...
  • Page 19 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 TC9462F (IC541) : DSP & DAC 1.Pin Layout 2.Pin Function (1/2) Symbol Pin No. Function Non connection TEST0 Non connection Non connection UHSO Non connection EMPH Non connection LRCK Digital GND terminal Non connection Non connection AOUT...
  • Page 20 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 2.Pin Function (2/2) TC9462F Symbol Function Pin No. RFRP signal center level input terminal RFCT RFRP zero cross input terminal RFZI RF ripple signal input terminal RFRP Focus error signal input terminal Sub-beam adder signal input terminal SBAD Test input terminal Normally, keep at "vref"...
  • Page 21 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 BA4905-V3(IC961):REGULATOR 1.Terminal layout 2.Block daigram L 13942296513 REGULATOR RESET RESET ACC5V VDD 5V CD 8V MEMORY.IN u163 REMOTE ACC.IN CTRL http://www.xiaoyu163.com...
  • Page 22 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 3.Pin function BA4905-V3 Pin no. Symbol Function RESET If VDD voltage becomes 4V or less.RESET output becomes low level. This output voltage is approximately 0.5V lower than VCC. and max REMOTE output current is 300mA. ACC5V A voltage supply for ACC block.This output voltage is approximately 0.7V lower than VDD's.
  • Page 23 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 LA6557-X(IC501):BTL Driver 1.Terminal layout 2.Block diagram CH3,4,5 Thermal shutdown VCC2 POWER V05- V05+ S-GND MUTE is as follows: High : Output ON Low : Output OFF V04+ MUTE MUTE L 13942296513 V04- VIN4 V03+ VIN4-...
  • Page 24 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 3.Pin function LA6557-X(2/2) Pin NO. Symbol Function VCC2 Power for channels 3,4, and 5 (VCC1 and VCC-S short-circuited) V05- Loading output (-) V05+ Loading output (+) V04+ Output pin (+) for channel 4 V04- Output pin (-) for channel 4 V03+...
  • Page 25 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 HA13158A(IC301):Power AMP 1. Terminal layout 2.Block diagram INVCC PVCC2 PVCC1 STBY Buffer & Mute -1 Amp1 L 13942296513 Buffer & Mute -2 Amp2 Buffer & Mute -3 Amp3 Protector (ADO,Surge,TSD) Buffer & Mute -4 Amp4 MUTE u163...
  • Page 26 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 3.Pin Function HA13158A Symbol Function INRR Amp 1 input STANDBY Standby input OUTRR+ Amp 1 output + OUTRR- Amp 1 output- Power OUTFR+ Amp 2 output + OUTFR- Amp 2 output - MUTEING Muting control input INFR...
  • Page 27 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 3. Pin function SAA6579-X SYMBOL DESCRIPTION QUAL Quality indication output RDDA RDS data output Vref Reference voltage output (0.5V Multiplex signal input +5V supply voltage for analog part Ground for analog part (0V) Sub carrier input to comparator SCOUT Sub carrier output of reconstruction filter...
  • Page 28 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 SAA6579T-X(IC71):RDS Detecter 1. Pin layout QUAL RDSL RDDA Vref OSCO OSCI TEST SOUT MODE 2. Block diagram 47pF 82pF L 13942296513 4.332/8.664 MHz 2.2k 0.1 F OSCI OSCO ANTIL 57 kHz OSCILLATOR signal QUAL QUALITY BIT...
  • Page 29 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 TEA6320T-X(IC161): E.Volume 1.Terminal layout L 13942296513 2.Block diagram MUTE VOLUME II FUNCTION 0 to -55 dB ZERO CROSS BARANCE DETECTOR FADER REAR POWER SUPPLY VOLUME 1 BASS TREBLE +20 to -31dB LEFT VOLUME II LEFT LOUDNESS...
  • Page 30 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 3. Pin function TEA6320T-X Pin No. Symbol Description Serial data input / output Ground OUTRL Output left rear OUTLF Output left front Treble control capacitor left channel or input from an external equalizer Bass control capacitor left channel or output to an external equalizer Bass control capacitor, left channel...
  • Page 31 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 HD74HC126FP-X (IC801) : Buffer 1. Pin layout 2. Function Inputs Outputs 3. Block diagram Output Input L 13942296513 Output Sample as Load Circuit 1 Output Sample as Load Circuit 1 Output Sample as Load Circuit 1 u163 http://www.xiaoyu163.com...
  • Page 32 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 RPM6938-SV4 (IC680) : Remote control receiver Comp Rout Detector conversion trimming circuit magnetic shield L 13942296513 NJM4565M-WE (IC581) : CD L.P.F A OUTPUT B OUTPUT A INPUT B INPUT A INPUT B INPUT u163 http://www.xiaoyu163.com...

  • Page 33: Block Diagram

    “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 Block diagram L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 34: Standard Schematic Diagrams

    “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 Standard schematic diagrams Receiver & power amplifier circuit 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 CD/MAIN SIGNAL TUNER SIGNAL Note: /s/C/jes/3116.001 KD-S777R/SX878R FSDH3116-005TW 1/3...
  • Page 35 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 CD Servo control circuit 1 3 9 4 2 2 9 6 5 1 3 w w w CD/MAIN SIGNAL u 1 6 3 Note: /s/C/jes/3116.002 KD-S777R/SX878R FSDH3116-005CW 2/3 http://www.xiaoyu163.com...
  • Page 36 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 LCD Driver circuit 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 Note:/s/C/jes/3121.003 KD-S777R/SX878R FSDH3116-005SW 3/3...

  • Page 37: Printed Circuit Board

    “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 Printed circuit boards Main board Main board (Forward side) (Reverse side) 1 3 9 4 2 2 9 6 5 1 3 Note:/d2//c/jes/s676r+sx878/mainpws/1082mo Front board Front board (Forward side) (Reverse side) w w w u 1 6 3...

  • Page 38: Parts List

    “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 PARTS LIST [ KD-SX878R ] [ KD-S777R ] * All printed circuit boards and its assemblies are not available as service parts. Areas suffix E ----------- Continental Europe L 13942296513 - Contents -...
  • Page 39 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 Exploded view of general assembly and parts list Block No. L 13 94 2 29 65 13 u 1 6 3...
  • Page 40 TORSION SPRING 1 FOR LOCK LEVEL FSXP3026-002 RLS KNOB FSKW3002-015 COMP.SPRING FSPK3009-001 BLIND FSJC1048-001 FRONT PANEL FSJD3019-00C FINDER ASSY 1 KD-SX878R FSJD3019-00D FINDER LENS 1 KD-S777R FSXP2045-002 PRESET BUTTON 1 1-6 FSXP3053-002 POWER BUTTON FSXP3064-001 EJECT BUTTON FSXP2038-002 FUNCTION CAP...
  • Page 41 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 63 1515 0 CD mechanism assembly and parts list Block No. Grease G-31SA G-31SA(Bottom side) RX-405 L 13942296513 u163 106 29...
  • Page 42 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com Parts list ( CD mechanism ) 3 7 63 1515 0 Block No. M2MM Parts number Parts name Q'ty Description Item Area 30310101T FRAME 30310103T DANPER PIN 30310107T UPPER PLATE 30310108T SEL STOP PLATE 30310142T SEL ARM (L)L 30310143T SEL ARM (R)L 30310145T...
  • Page 43 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com Parts list ( CD mechanism ) 3 7 63 1515 0 Block No. M2MM Parts number Parts name Q'ty Description Item Area 30311035T FPC HOLDER(Z) 19501403T WIRE CLAMPER 30311037T PICK UP FPC(Z) 30311036T CONNECT.PCB(Z-J 30311038T WIRE (5P-Z) 30311039T WIRE (LD-Z) 30311040T...
  • Page 44 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com Block No. 01 Electrical parts list ( Main board ) Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area 3 7 63 1515 0 NDC21HJ-5R0X C CAPACITOR C 352 NCS21HJ-391X C CAPACITOR NDC21HJ-100X C CAPACITOR C 501...
  • Page 45 Parts name Remarks Area 3 7 63 1515 0 C 706 QEKJ0JM-107Z E CAPACITOR 100MF 20% 6.3V IC581 NJM4565M-WE IC701 UPD178078GF-524 KD-SX878R C 707 NCB21HK-103X C CAPACITOR C 708 QERF0JM-107Z E CAPACITOR 100MF 20% 6.3V IC701 UPD178078GF-522 IC(MICRO-COMP) KD-S777R C 709...
  • Page 46 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com Block No. 01 Electrical parts list ( Main board ) Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area 3 7 63 1515 0 R 54 NRSA02J-103X MG RESISTOR R 541 NRSA02J-472X MG RESISTOR R 55 NRSA02J-222X...
  • Page 47 NRSA02J-473X MG RESISTOR R 740 NRSA02J-103X MG RESISTOR R 742 NRSA02J-473X MG RESISTOR KD-S777R R 743 NRSA02J-473X MG RESISTOR KD-SX878R R 744 NRSA02J-222X MG RESISTOR R 745 NRSA02J-222X MG RESISTOR R 747 NRSA02J-473X MG RESISTOR R 781 NRS181J-273X MG RESISTOR...
  • Page 48 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com Block No. 02 Electrical parts list ( Front board ) Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area 3 7 63 1515 0 C 672 NBE20JM-475X TS E CAPACITOR R 634 NRSA02J-271X MG RESISTOR C 681...
  • Page 49 “无奇不有”电路图网 http://www.xiaoyu163.com http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 Packing materials and accessories parts list Block No. Block No. KIT2: A10,A11 L 13 94 2 29 65 13 KIT1:A5~A9 A2~4,A17 u 1 6 3...
  • Page 50 Packing parts list 3 7 63 1515 0 Block No. M3MM Parts number Parts name Q'ty Description Item Area FSPE3001-169 CARTON 1 KD-SX878R FSPE3001-168 CARTON 1 KD-S777R FSPH1018-002 CARTON VPE3005-064 POLY BAG 1 SET 260X440X0.0 QPA01703505P POLY BAG 2 INST.BOOK...

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