Sharp CD-C831W Service Manual

– 1 –CD-C831WNo. S5934CDC831W/ CONTENTSPageSAFETY PRECAUTION FOR SERVICE MANUAL ...

CD-C831W– 10 –MECHANISM SECTIONADJUSTMENTFigure 10 ADJUSTMENT POINTS• Driving Force CheckTorque Meter Specified ValuePlay: TW-2412 Tape 1: Over 80 gTa

– 11 –CD-C831WTEST MODEFigure 11-2Figure 11-3Since this CD system incorporates the following automatic adjustment function, when the pickup is replace

CD-C831W– 12 –SW715 VIDEO ON—OFFSW716 TAPE ON—OFFSW717 CD ON—OFFSW721 DISPLAY MODE ON—OFFSW722 FF ON—OFFSW723 TUNING UP ON—OFFSW724 TUNING DOWN ON—OFF

– 13 –CD-C831W Figure 13 BLOCK DIAGRAM (1/3)27123418671824402045152316 262772252029351421223839284142 37 36PU-IN SWXL1XINLD0FIN2JP–CV+SLCSL1FIN1EFFDSP

CD-C831W– 14 – Figure 14 BLOCK DIAGRAM (2/3)X351456kHzFM DETCF351+B4+B4+B4+B4VOLTAGEREGURATER+5VFM +BVTT306T302CF302DOCECLDIFE301FM FRONT ENDQ360MPXVC

– 15 –CD-C831W Figure 15 BLOCK DIAGRAM (3/3)Q704D701~D704ZD802RL801 110V230-240V127V220VSWM3L PROOFSWM4F.A.S SOLM1OLENOID SWM5CAM 1 2 3 4 15 25162628

CD-C831W– 16 –Figure 16 SCHEMATIC DIAGRAM (1/9)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 12.R602 1.R604 1.R606 1.R608

– 17 –CD-C831WFigure 17 SCHEMATIC DIAGRAM (2/9)78 9 10 11 12CNP303R640 47K R64247K 602 1.5KC6044.7/50604 1.5KC6064.7/50606 1.5K608 1.5KC6

CD-C831W– 18 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 12.Figure 18 SCHEMATIC DIAGRAM (3/9)F832T500mAL 250VD8211SS133D8201SS133

– 19 –CD-C831WFigure 19 SCHEMATIC DIAGRAM (4/9)78 9 10 11 12L9702.2mHC971100PC970100PFW801C956100/50C954100/50C9530.001C9520.001C9510.001C9500.001Q908

CD-C831W– 2 –SAFETY PRECAUTION FOR SERVICE MANUALWARNINGSTHE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LA

CD-C831W– 20 –Figure 20 SCHEMATIC DIAGRAM (5/9)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 12.MD701D702D703D704D701~704: 1SS133 C7

– 21 –CD-C831WFigure 21 SCHEMATIC DIAGRAM (6/9)78 9 10 11 12R761 1KD7231SS133R7954.7K C7230.1/50C710220/10R7114.7KR7513.3KR75010K R74910K 10K 701AW

CD-C831W– 22 –Figure 22 SCHEMATIC DIAGRAM (7/9)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 12.D11SS133C77100/16R36220KC570.00R122R

– 23 –CD-C831WFigure 23 SCHEMATIC DIAGRAM (8/9)78 9 10 11 12• The numbers 1 to 12 are waveform numbers shown in page 33.R842.2KIC2LC78622NESERVO

CD-C831W– 24 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 12.Figure 24 SCHEMATIC DIAGRAM (9/9)CNS303P17 12 - DTO MAIN PWBC36927P

– 25 –CD-C831W78 9 10 11 12Figure 25 WIRING SIDE OF P.W.BOARD (1/7)C338C323C346R369C347C345R345R380R379R381C397R344C341C330C337C332C392C334R323C343R35

CD-C831W– 26 –Figure 26 WIRING SIDE OF P.W.BOARD (2/7)ABCDEFGH123456R907C630R633R631C631C632R632R634R619R625R626R640R617R618C624C623C625R628C634R614R6

– 27 –CD-C831WFigure 27 WIRING SIDE OF P.W.BOARD (3/7)78 9 10 11 12C101R107C108R104R105R103R136C130R132R122C120R124R126R140R146R134C107R117C139R137C12

CD-C831W– 28 –Figure 28 WIRING SIDE OF P.W.BOARD (4/7)ABCDEFGH123456BI701 C705Q703Q702R786LED716D716RD24SW713STOPSW725 R764R763R762LED717RD23BI702 R77

– 29 –CD-C831WFigure 29 WIRING SIDE OF P.W.BOARD (5/7)78 9 10 11 12SW715VIDEO/AUX RD14R714SW717 SW716TAPE SW701STAND BYRD01C715C702SW702STATIONFW7021

– 3 –CD-C831W Cassette deck sectionType: Compact cassette tapeFrequency response: 50 - 14,000 Hz (Normal tape)Motor: DC motor with electronicgovernor

CD-C831W– 30 –Figure 30 WIRING SIDE OF P.W.BOARD (6/7)ABCDEFGH123456RCNPM1CNPM21212FWM1FWM2SWM3FOOL PROFF(204-9)SWM4F. A. S(204-10)1234567891011123421

– 31 –CD-C831WFigure 31 WIRING SIDE OF P.W.BOARD (7/7)78 9 10 11 12• The numbers 1 to 12 are waveform numbers shown in page 33.12346587654321123

CD-C831W– 32 –VOLTAGE0V0V0V0V4.8V4.8V0V4.9V4.9V2.3V2.3V4.0V0V0V0V0V4.8V4.8V4.8V0V0V0V0V4.8V0V0V0V0V0V0V0V5.0V5.0V5.0V4.8V5.0V4.7V5.0V4.8V4.9V987654321

– 33 –CD-C831WWAVEFORMS OF CD CIRCUIT35ms0.50 VIC1 20 F.E15ms5.0 VIC1 54 DRFSTOP PLAYFOCUS SERCH1354267891011345678967810111296789120.5ms1.00 V

CD-C831W– 34 –TROUBLESHOOTING (CD SECTION)When the CD does not functionWhen the CD section does not operate when the objective lens of the optical pic

– 35 –CD-C831W• When the turntable fails to stop.Is from 5 V till 2.5V down pulse (approx. 300 ms)Check the SWM3 and the wiring from the IC701 pin

CD-C831W– 36 –• When the CD tray fails to open or close.Is there following voltage input in specific state of IC701 pin 19? Open state: 0V Cl

– 37 –CD-C831W• Playback can only be performed when a disc isloaded.Is HF waveform normal (see the Fig.37-1, 2)?Check the tracking system. Is the Foc

CD-C831W– 38 –• Checking the spin system.YesNoPlay operation is performed without disc.The turntable rotates a little.The turntable fails to rotate o

– 39 –CD-C831WFUNCTION TABLE OF ICIC1 VHiLA9241M/-1: Servo Amp. (LA9241M) (1/2)1 FIN2 Connection pin for photodiode of pickup.RF signal is generated t

CD-C831W– 4 –NAMES OF PARTS Front Panel1. Disc Number Selector Buttons2. Disc Tray3. Multi Indicator4. Disc Skip Button5. Open/Close Button6. Extra Ba

CD-C831W– 40 –IC1 VHiLA9241M/-1:Servo Amp.(LA9241M) (2/2)Pin No.Port NameFunction51 CL Micro computer command clock input pin.52 DAT Micro computer co

– 41 –CD-C831W1 DEFI Input Defect detection signal (DFF) input terminal. (When this terminal is not used, connect it to 0V.)2 TAI Input For PLL Input

CD-C831W– 42 –IC2 VHiLC78622N-1: Servo/Signal Control (LC78622NE) (2/2)47* SBSY Output Sub-code clock sync signal output terminal.48* EFLG Output C1,

– 43 –CD-C831W1 IN2- CH2 inverted input.2 IN1A- CH1 inverted input.3 IN1B- CH1 output offset control.4 OUT1- CH1 inverted output.5 OUT1+ CH1 non-inver

CD-C831W– 44 –IC701 RH-iX0281AWZZ:System Microcomputer (IX0281AW) (1/2) orIC701 RH-iX0310AWZZ:System Microcomputer (IX0310AW) (1/2)1 VDD VDD — (+) P

– 45 –CD-C831WIC701 RH-iX0281AWZZ:System Microcomputer (IX0281AW) (1/2) orIC701 RH-iX0310AWZZ:System Microcomputer (IX0310AW) (1/2)55 P117 DISTO Inp

CD-C831W– 46 –FL701 VVKBJ685GNK-1: FL DisplayFigure 46 FL DISPLAYS IC OS5S4S2S3DpS1B1 B2B3 B4 B5B6 B7B1B2B3B4B5B6B79G10G11G1G 2G 3G 4G 5G 6G 7G 8GB21B

– 47 –CD-C831WPARTS GUIDENOTE:Parts marked with “ ” are important for maintaining the safety of the set.Be sure to replace parts with specified ones f

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONCD-C831WINTEGRATED CIRCUITSIC1 VHILA9241M/-1 J AS Servo Amp.,LA9241MIC2 VHILC78622

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONCD-C831WC27 VCKYTV1HB102K J AA 0.001 µF,50VC28 VCTYPA1CX104K J AB 0.1 µF,16VC29 VCE

– 5 –CD-C831W Front Speaker1. Tweeter2. Woofer3. Bass Reflex Ducts4. Speaker Wire Surround Speaker 1. Full Range Speaker 2. Speaker WireCP-C831GBOXS

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONCD-C831WC903 VCEAZA1HW105M J AB 1 µF,50V,ElectrolyticC904 VCEAZA1HW106M J AB 10 µF

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONCD-C831WR560 VRD-ST2CD474J J AA 470 kohms,1/6WR561 VRD-ST2CD153J J AA 15 kohms,1/6W

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONCD-C831WCNP701 QCNCWZG22AWZZ J AE Socket,22PinCNP801 QCNCM042EAWZZ J AB Plug,5PinC

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONCD-C831W234 NGERW0006AWZZ J AC Gear,Worm Wheel235 NPLYD0002AWZZ J AC Pulley236 NROL

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONCD-C831W903 92L121-0162 J AU Net Frame Ass’y904 92L122-0042 J AG Speaker Wire Ass’

CD-C831W– 59 –ABCDEFGH123456Figure 8 CD MECHANISM EXPLODED VIEW– 8 –CD-C831W306-1701304701302301702702303M1703x2703x2305x2SW4M2305PWB-D306-2306-33067

CD-C831W– 60 –Figure 9 CABINET EXPLODED VIEW (1/2)ABCDEFGH123456– 9 –CD-C831W257205M901615x2203PWB-A1PWB-A3PWB-A5240x8Silicongrease606x3Q823Q824Q8222

CD-C831W– 61 –Figure 10 CABINET EXPLODED VIEW (2/2)ABCDEFGH123456– 10 –CD-C831WPWB-ECDMECHANISMPWB-B262621611236213223217210238236611213612x423622221

CD-C831W– 62 –ABCDEFGH123456Figure 11 SPEAKER EXPLODED VIEW (1/2)– 11 –CP-C831902SP3,4SP1,2904910x4911x2909905901906907903BKBKRDRDTWEETERSP3,4WOOFERSP

CD-C831W– 63 –Figure 12 SPEAKER EXPLODED VIEW (2/2)– 12 –GBOXS0025AWM1ABCDEFGH123456902SP1,2SP1,2901905x6903904

CD-C831W– 6 –OPERATION MANUALTUNING/TIME( )MEMORY/SETCLOCKON/STAND-BY1Press the ON/STAND-BY button to enter the stand-by mode.2Press the CLOCK b

CD-C831W– 64 –– 14 –COPYRIGHT 1999 BY SHARP COPORATIONALL RIGHTS RESERVED.No part of this publication may be reproduced,stored in a retrieval

– 7 –CD-C831WDISASSEMBLYCaution on DisassemblyFollow the below-mentioned notes when disassemblingthe unit and reassembling it, to keep it safe and ens

CD-C831W– 8 –Figure 8-1Figure 8-2Figure 8-3Be Careful when installing the CD changer mechanism.Install the CD changer mechanism on the CD player base

– 9 –CD-C831WCP-C8311 Front Speaker 1. Front Panel .... (A1) x1 9-12. Tip ....... (A2) x23. Screw ...... (A3