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JVC KD-S821R Service Manual
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JVC KD-S821R Service Manual

Cd receiver
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SERVICE MANUAL
Contents
Safety precaution
Preventing static electricity
Disassembly method
Adjustment method
COPYRIGHT
CD RECEIVER
KD-S821R
KD-S821R
45Wx4
DISP
MO
RND
7
8
9
10
11
12
DIGITAL AUDIO
1-2
Flow of functional
1-3
operation unit TOC read
1-4
Maintenance of laser pickup
1-11
Replacement of laser pickup
Description of major ICs
2002 VICTOR COMPANY OF JAPAN, LTD.
RDS
TP
PTY
SCM
COMPACT
Area Suffix
E -------- Continental Europe
EX ------ Central Europe
KD-S821R
2-1
2-3
2-3
2-6
No.49679
Feb. 2002

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Summary of Contents for JVC KD-S821R

  • Page 1 KD-S821R SERVICE MANUAL CD RECEIVER KD-S821R KD-S821R 45Wx4 DISP COMPACT DIGITAL AUDIO Area Suffix E -------- Continental Europe EX ------ Central Europe Contents Safety precaution Flow of functional Preventing static electricity operation unit TOC read Disassembly method Maintenance of laser pickup...
  • Page 2 KD-S821R 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 3 KD-S821R 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.
  • Page 4 KD-S821R Disassembly method <Main body> Removing the front panel assembly (See Fig.1) Press the eject button in the lower right part of the front panel. Remove the front panel assembly from the body. Front panel assembly Eject button Fig.1 Tab a Removing the front chassis assembly (See Fig.2 and 3)
  • Page 5 KD-S821R Removing the heat sink (See Fig.4) Remove the three screws A on the left side of the body. Heat sink Fig.4 Joints b Removing the bottom cover (See Fig.5 and 6) Bottom cover Prior to performing the following procedure, remove the front panel assembly, the front chassis assembly and the heat sink.
  • Page 6 KD-S821R Removing the main board (See Fig.7 and 8) Prior to performing the following procedure, remove the front panel assembly, the front chassis assembly, the heat sink and the bottom cover. Remove the screw B, the two screws C and the...
  • Page 7 KD-S821R Removing the control switch board (See Fig.10 to 12) Prior to performing the following procedure, remove the front panel assembly. Remove the four screws G attaching the rear cover on the back of the front panel assembly. Unjoint the twelve joints c with the front panel and Rear cover the rear cover.
  • Page 8 KD-S821R Damper bracket <CD mechanism section> CD mechanism assembly Removing the CD mechanism control board (See Fig.1 and 2) Unsolder the part a and b on the CD mechanism control board. Remove the stator fixing the CD mechanism control board and the damper bracket (To remove the stator smoothly, pick up the center part).
  • Page 9 KD-S821R assembly Damper bracket CD mechanism Removing the CD mechanism assembly (See Fig.1, 6 to 9) Prior to performing the following procedure, remove the CD mechanism control board and the front bracket (loading motor). Remove the three screws D and the damper bracket.
  • Page 10 KD-S821R Removing the feed motor assembly FD screw Part i Feed motor assembly (See Fig.10) Prior to performing the following procedure, remove the CD mechanism control board, the front bracket Part j (loading motor) and the CD mechanism assembly. Remove the two screws F and the feed motor assembly.
  • Page 11 6. Digital tester MW 522kHz ~ 1620 kHz 7. Tracking offset meter LW 144kHz ~ 279kHz 8. Test Disc JVC :CTS-1000 9. Extension cable for check EXTGS004-26P 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 12 KD-S821R Flow of functional operation until TOC read Power ON • When the laser diode correctly Set Function to CD • When the pickup correctly moves emits to the inner area of the disc Microprocessor Microprocessor Disc inserted commands commands TC9462 "53"...
  • Page 13 KD-S821R Feed Section Check CD 9V Is the voltage output at Is the wiring for IC541 Is 5V present at IC501 and 5V. IC541 pin "53" 5V or 0V? (90) ~ (100) correct? pin "20"? Check the vicinity of IC541.
  • Page 14 KD-S821R 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 15 KD-S821R Description of major ICs HA13164A (IC961) : Regurator 1.Pin layout 2.Block daiagram Surge Protector 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 BIAS 3.Pin function Pin No. Symbol Function REMOTE Output voltage is VCC-1V.When M or H level applied to CTRL pin.
  • Page 16 KD-S821R UPD178078GF-558 (IC701) : System CPU 1.Pin layout 2.Pin function (1/2) Symbol FUNCTION No use BUSINT JVC bus communication line BUSSI JVC bus communication line BUSSO JVC bus communication line JBUS-SCK JVC bus communication line No use I2CDAI Serial data input...
  • Page 17 KD-S821R 2.Pin function (2/2) UPD178078GF-558 Symbol FUNCTION GNDPLL AMEO PLL error output for AM FMEO PLL error output for FM IC(VPP) Setting to write for flash RESET System reset CD mech switch REMOCON Remocon input No use TEL-MUTE No use...
  • Page 18 KD-S821R LA4743K(IC301):Power amp 1.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...
  • Page 19 KD-S821R 2.Terminal layout 3.Pin function LA4743K Pin No. Symbol Function Header of IC Power GND Outpur(-) for front Rch OUTRR- STBY Stand by input OUTRR+ Output (+) for front Rch VCC1/2 Power input OUTRF- Output (-) for rear Rch Power GND...
  • Page 20 KD-S821R LA6567H-X(IC501):BTL driver 1.Pin layout & blockdiagram CH 3,4,5 Thermal shutdown VCC2 Power supply V05- V05+ S-GND V04+ VCONT V04- VIN4 V03+ VIN4G Signal system power supply V03- VCC-S V02+ VREF-IN 5VREG(PNPTr The outside putting) V02- REG-OUT V01+ REG-IN V01-...
  • Page 21 KD-S821R 2. Pin function LA6567H-X(2/2) Pin no. Symbol Function VCC2 CH3,4,5 Power supply( It is short with VCC1,VCC-S) V05- Loading output(-) V05+ Loading terminal (+) V04+ CH4 Output terminal(+) V04- CH4 Output terminal(-) V03+ CH3 Output terminal(+) V03- CH3 Output terminal(-)
  • Page 22 KD-S821R TC9462F(IC541): DSP & DAC 1.Pin layout & Block Diagram 50 V Servo 49 TRO 1bit control Clock 48 FOO generator TEZI 46 TEI 45 TSIN TEST1 44 SBAD Digital equalizer TEST2 43 FEI Address circuit Automatic adjustment TEST3 42 RFRP...
  • Page 23 KD-S821R TC9462F(2/3) Symbol Function Remarks Pin No. Non connected HSSW Non connected ZDET Phase difference signal output terminal of EFM 3-state output. signal and PLCK signal. (P2VREF,PVREF,VSS) TMAX detection result output terminal. Selected by 3-state output. TMAXS command bit (TMPS) (P2VREF,PVREF,VSS) TMAX detection result output terminal.
  • Page 24 KD-S821R TC9462F(3/3) Symbol Function Remarks Pin No. Test input terminal, Normally, keep at "L" level Analog input. TESIN Test input/output terminal. Normally, keep at "L" level Analog input. TESIO1 Digital GND terminal Crystal oscillator connecting input terminal for DSP Crystal oscillator connecting output terminal for DSP...
  • Page 25 KD-S821R SAA6579T-X(IC71):RDS detecter 1.Pin layout QUAL DATA Vref OSCO OSCI TEST SCOUT MODE 2.Block diagram ANTI- 57 kHz OSCILLATOR QUALITY BIT RECONSTRUCTION ALIASING BAND PASS GENERATOR FILTER FILTER (8th ORDER) DIVIDER BIPHASE COSTAS LOOP CLOCKED DIFFERENTIAL VARIABLE AND SYMBOL COMPARATOR...
  • Page 26 KD-S821R 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 7.96k ohm...
  • Page 27 KD-S821R HD74HC126FP-X (IC771) : Buffer 1.Terminal layout 3.Pin function Input Output Note: H : High L : Low X : H and L Z : H.L.X 2.Block diagram Output Input Output Sample as Load Circuit 1 Output Sample as Load Circuit 1...
  • Page 28 KD-S821R LC75823W (IC601) : 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 2.
  • Page 29 KD-S821R TEA6320T-X (IC161) : E.volume 1.Pin layout 2.Block diagram OUTRR OUTLR VOLUME 2 MUTE 0 to 55 dB OUTRF FUNCTION OUTLF BALANCE ZERO CROSS FENDER REAR POWER DETECTOR SUPPLY VOLUME 1 BASS TREBLE +20 to -31 dB VOLUME 2 LEFT...
  • Page 30 KD-S821R RPM6938-SV4(IC602) : Remote sensor Comp Rout Detector conversion trimming circuit magnetic shield NJM4565M-WE (IC581) : CD L.P.F A OUTPUT B OUTPUT A INPUT A INPUT B INPUT B INPUT 1-30...
  • Page 31 KD-S821R VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan 200202 (No.49679)
  • Page 32 KD-S821R PARTS LIST [ KD-S821R ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix E ----------- Continental Europe EX --------------- Central Europe - 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 33 KD-S821R Exploded view of general assembly and parts list Block No.
  • Page 34 KD-S821R Parts list (General assembly) Block No. M1MM Item Description Parts number Parts name Q'ty Area ------------ CD MECHA FSJC1029-404 TOP CHASSIS FSMH3001-202 SIDE PANEL BOTTOM COVER FSKM3011-002 FSMA3004-203 INSULATOR QYSDST2604Z SCREW 3 CHASSIS+MECHA BKT FSKZ4005-001 SCREW 2 CHASSIS+SIDE PANEL...
  • Page 35 KD-S821R CD mechanism assembly and parts list Block No. Grease TN-CCD1001Z-136J G-31SA G-31SA(Bottom side) RX-405 106 29...
  • Page 36 KD-S821R Parts list (CD mechanism) Block No. MBMM Item Description Parts number Parts name Q'ty Area 30310101T FRAME 30310103T DANPER PIN UPPER PLATE 30310107T 30310108T SEL STOP PLATE 30310142T SEL ARM (L)L 30310143T SEL ARM (R)L 30310145T S ARM SPRING(L)
  • Page 37 KD-S821R Parts list (CD mechanism) Block No. MBMM Item Description Parts number Parts name Q'ty Area 64180403T DET SWITCH 2 ESE22MH3 68150232T CONNECTOR 1 TKC-W26X-C1 SOPPORT PLATE 30311105T 30311138T GR MT BLK(N) 30311109T LDG GEAR (2) 30311110T LDG GEAR (3)
  • Page 38 KD-S821R Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area NDC31HJ-5R0X C CAPACITOR C 331 QERF1HM-225Z E CAPACITOR 2.2MF 20% 50V NDC31HJ-100X C CAPACITOR C 332 NCS31HJ-391X...
  • Page 39 KD-S821R Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 591 NCS31HJ-821X C CAPACITOR D 784 UDZ11B-X Z DIODE C 592 QEKJ1EM-475Z E CAPACITOR 4.7MF 20% 25V...
  • Page 40 KD-S821R 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 502 NRSA63J-562X MG RESISTOR R 10 NRS181J-8R2X MG RESISTOR R 503 NRSA63J-242X MG RESISTOR...
  • Page 41 KD-S821R Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area R 712 NRSA63J-472X MG RESISTOR R 713 NRSA63J-103X MG RESISTOR R 714 NRSA63J-103X MG RESISTOR R 715 NRSA63J-103X MG RESISTOR R 716 NRSA63J-103X MG RESISTOR...
  • Page 42 KD-S821R 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 637 NRSA63J-182X MG RESISTOR C 602 NCS31HJ-681X C CAPACITOR R 638...
  • Page 43 KD-S821R Packing materials and accessories parts list Block No. Block No. A1~A5 KIT : A7~A11 3-12...
  • Page 44 KD-S821R Parts list (Packing) Block No. M3MM Item Description Parts number Parts name Q'ty Area FSPG4002-001 POLY BAG 1 FOR INST BOOK FSPG4002-001 POLY BAG 2 FOR INST BOOK POLY BAG 1 FOR SCRWE KIT QPA00801205 QPA01003003 POLY BAG 1 FOR HARD CASE...
  • Page 45 KD-S821R TU_L,TU_R TUNER PACK SM,SQ SEEK/STOP SD/ST MONO IFC,OSC LEVEL LINE IC161 OUTFL IC71 AMEO AFCK OOUT E.VOL OUTFR FMEO FM/AM LOADING OUTRL DETECTOR TRACKING OUTRR PICKUP RDSSCK IC501 FOCUS FE,SP,FD IC581 RDSDA CD_L SPINDLE CD LPF CD_R DRIVER LOADING...
  • Page 46 KD-S821R < M E M O >...
  • Page 47 KD-S821R Standard schematic diagrams Receiver & System control section QAU0222-001 QNB0100-002 COMP.OUT 0.022 4.7u C189 1/50 R187 C191 IC301 1/50 LA4743K C169 1/50 R167 Q181 2SD601A C171 1/50 2SD601A 0.1/50 1SS133 1SS133 R161 R162 220k C166 C351 R351 C163 0.0056 2.2/50...
  • Page 48 KD-S821R KD-S821R CD servo control section R586 R508 R584 R581 C582 4.7/25 R585 1.5K C584 R-CH 120P R507 8.2k C581 820P D501 DSK10C R504 R501 8.2k R506 D502 DSK10C IC581 NJM4565M C591 820P C595 100/10 IC501 R591 C594 C592 4.7/25...
  • Page 49 KD-S821R LCD driver & Operation switch section QSW0863-001 JS690 RPM6938-SV4 IC602 R661 0.022 C681 R662 VCM0335-001 CJ601 ILL_10V LCD1 ACC5V REMOCON ENC1 ENC2 BUS2 LCD_CLK LCD_SO LCD_CO BUS1 KEY0 KEY1 KEY2 IC601 LC75823W R605 R604 R603 R602 R601 Key0 3.9k 2.7k...
  • Page 50 KD-S821R KD-S821R Printed circuit boards Main board Main board (Forward side) (Reverse side) L961 MEM.DET SW5V ACC.IN REMOTE IC961 ANTCTRL CP961 J301 IC961 R904 TEL-MUTE C901 Q321 CP961 D910 Q351 J801 Q331 L961 C915 J801 D911 C801 C915 R342 Q341...