Sharp MD-M3 Service Manual Page 1

– 1 –MD-M3/M1 CONTENTSMD-M3SERVICE MANUALSHARP CORPORATIONNo.S6940MDM3M1// • In the interests of user-safety the set should be restored to its origin

MD-M3/M1– 10 –MD MICRO SYSTEMQuick Guide/Guía rápidaMD-M1Remote SensorSensor remoto2Preparation for use / Preparación para su uso1Check the supplied a

– 11 –MD-M3/M11 Top Cabinet 1. Screw ... (A1) x4 11-12. Socket ... (A2) x32 Side Panel (Right,Left)1. Screw ...

MD-M3/M1– 12 –Figure 12-1Figure 12-3Figure 12-21 Speaker 1. Net ... (A1) x1 12-4(Woofer/Tweeter) 2. Screw ... (A2) x43.

– 13 –MD-M3/M1REMOVING AND REINSTALLING THE MAIN PARTSMD MECHANISM SECTIONFor details about the procedure to remove the MD mechanismfrom the main unit

MD-M3/M1– 14 –Figure 14-2Figure 14-3How to remove the spindle motor(See Fig. 14-2)1. Remove the screws (E1) x 2 pcs., (E2) x 1 pc., and removethe spi

– 15 –MD-M3/M1StopMemoryMemoryCLV ONManual playCD MECHANISM SECTIONFor details about the procedure to remove the CD mechanismfrom the main unit, refer

MD-M3/M1– 16 –MD SECTIONEntering the specific modeWhenever the SURROUND button is pressed, the mode is changed.AUTO pre-adjustment AUTO adju

– 17 –MD-M3/M1SO301ElectronicvoltmeterSpeakerTerminalUNITFM signal oscillatorSince this CD system incorporates the following automaticadjustment funct

MD-M3/M1– 18 –1. Preparation for adjustment Test discMD SECTIONTypeTest discPart No.1 High reflection disc TGYS1 (SONY) [for Playback] RRCDT0101AFZZ2

– 19 –MD-M3/M10NUL00h01hBLANKBLANK02hBLANK03hBLANK04hBLANK05hBLANK06hBLANK07hBLANK08hBLANK09hBLANK0AhBLANK0BhBLANK0ChBLANK0DhBLANK0EhBLANK0FhBLANKSOHS

MD-M3/M1– 2 –FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFERTO THE OPERATION MANUAL.IMPORTANT SERVICE NOTES (For U.S.A.Only)BEF

MD-M3/M1– 20 –3. AUTO adjustment modeStep No.Setting MethodRemarks Display *Step 1 Test mode STOP state The AUTO preliminary adjustment should have be

– 21 –MD-M3/M15. TEST-PLAY modeStep 1 Test mode STOP state The AUTO preliminary adjustment should have been completed. [ t s m 1 3 e ]Step 2 Press

MD-M3/M1– 22 –Figure 22-3 Optical Pickup Grating DeviationMeasuring Method Mechanism Adjustment1. Optical pickup grating inspecting methodAfter the au

– 23 –MD-M3/M1 EEPROM (IC1402) writing procedure1. Method for setting the reference temperature value(This setting should be performed quickly at a ro

MD-M3/M1– 24 –C O K A 0 HF A T C 0 HT A T 3 E HC A T 2 0 HF A B 6 4 HS T R 0 A HS F S 0 D HS T C 0 D HSlide settingItem indicationSett

– 25 –MD-M3/M1• Defect occurred successively 10 times during REC-PLAY.• As a result of occurrence of defect during REC-PLAY therecordable cluster beca

MD-M3/M1– 26 –NOTES ON SCHEMATIC DIAGRAM• Resistor:To differentiate the units of resistors, such symbol as K and M areused: the symbol K means 1000 oh

– 27 –MD-M3/M1 Figure 27 BLOCK DIAGRAM (1/5)12345678910111213141516171819202122232425262728IC1300TC74ACT02FHEADDRIVERMDXL120133.8688MHzIC1202IX2474AF4

MD-M3/M1– 28 – Figure 28 BLOCK DIAGRAM (2/5)10 19 2 3 18 4 17 5 16 12 9 1 206 15 7 14 8 13 11 1 3 36177 8 9 106 5 4 3 1311121516192021171024 1 7131264

– 29 –MD-M3/M1 Figure 29 BLOCK DIAGRAM (3/5)2 5 6 1 4 3 9 13 8 14 7 11 10 12 RL990 F9954A/125VF9963.15A/125V F9973.15A/125V 1 3 F998F9992 7 3 5 1 11 1

– 3 –MD-M3/M1Specifications for this model are subject to change withoutprior notice.SPECIFICATIONSFOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS

MD-M3/M1– 30 – Figure 30 BLOCK DIAGRAM (4/5)1 305 6 2 3 4 7 8 926 23 14 15 25 24 272221201918 171612 13 10117 10 14 15 16 28 29 30 23 24 25 26 9 22 5

– 31 –MD-M3/M1 Figure 31 BLOCK DIAGRAM (5/5)49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 8

MD-M3/M1– 32 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 26. Figure 32 SCHEMATIC DIAGRAM (1/14)SYSTFLD01RD04 1KRD03 1KRD02 1KRD01

– 33 –MD-M3/M1Figure 33 SCHEMATIC DIAGRAM (2/14)78 9 10 11 12ICD01IX0288AWSYSTEM MICROCOMPUTER/FL DRIVERFLD01 RF51100KRF52100KRF72 100KRF73 100KRF74 1

MD-M3/M1– 34 –Figure 34 WIRING SIDE OF P.W.BOARD (1/8)ABCDEFGH123456SWD08MD EJECT SWD19FFSWD25RECSWD10SURROUNDSWD16MDSWD15CDSWD14TUNERRF51RF52ICD01IX

– 35 –MD-M3/M1Figure 35 SCHEMATIC DIAGRAM (3/14)• NOTES ON SCHEMATIC DIAGRAM can be found on page 26.ICP11M62439SPAUDIO PROCESSOR CP130.022(ML) CP14

MD-M3/M1– 36 –Figure 36 SCHEMATIC DIAGRAM (4/14)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 26.C8160.022ZD805 DZ8.2BR817560 C81547

– 37 –MD-M3/M1Figure 37 SCHEMATIC DIAGRAM (5/14)78 9 10 11 12D951TS4B03GMC9520.047(ML)C9510.047(ML)C8021000/25C8014700/25CX302200/50 R953220R954220 ZD

MD-M3/M1– 38 –Figure 38 SCHEMATIC DIAGRAM (6/14)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 26.54138M M C11100/10C2847/10 C5147/6.

– 39 –MD-M3/M1Figure 39 SCHEMATIC DIAGRAM (7/14)78 9 10 11 12• The numbers 1 to 12 are waveform numbers shown in page 54.1629783121110C45100/10C

MD-M3/M1– 4 –NAMES OF PARTS▲▲ Front panel1. Power Button2. (MD) Display Button3. Timer Stand-by Indicator4. (MD) Record Button5. (CD/MD/TUNER) Memory

MD-M3/M1– 40 –Figure 40 SCHEMATIC DIAGRAM (8/14)ABCDEFGH1234561629783121110C45100/10C368.2P(CH)C358.2P(CH)C3747/10C31100/6.3 IC2LC78640ESERVO SIGNALCO

– 41 –MD-M3/M178 9 10 11 12• The numbers 1 to 12 are waveform numbers shown in page 54.Figure 41 WIRING SIDE OF P.W.BOARD (2/8)CHASSISGNDIC11234

MD-M3/M1– 42 –• The numbers 1 to 12 are waveform numbers shown in page 54.Figure 42 WIRING SIDE OF P.W.BOARD (3/8)ABCDEFGH123456CNS15CHASSISGNDI

– 43 –MD-M3/M1Figure 43 WIRING SIDE OF P.W.BOARD (4/8)78 9 10 11 12CHASSISGND131112345678910 11 1252348765234567891011121314ICX11CX21CX38C807ZD802 1CN

MD-M3/M1– 44 –Figure 44 SCHEMATIC DIAGRAM (9/14)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 26.FM SIGNALAM SIGNAL D301DS1SS133D3

– 45 –MD-M3/M1Figure 45 SCHEMATIC DIAGRAM (10/14)78 9 10 11 12C3610.022C3630.022C3650.022C3660.001C36927PC3623.3/50C3671/50C3681/50C3721/50R3502.7KR35

MD-M3/M1– 46 –Figure 46 SCHEMATIC DIAGRAM (11/14)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 26.C9090.01C910470/10R912150 R911150

– 47 –MD-M3/M178 9 10 11 12Figure 47 SCHEMATIC DIAGRAM (12/14)F9954A/125VF9963.15A/125V F9973.15A/125V TF991 T991POWER TRANSFORMER (MAIN) 76540.01R907

MD-M3/M1– 48 –ABCDEFGH123456Figure 48 WIRING SIDE OF P.W.BOARD (5/8)123456721 3456CHASSISGNDCHASSISGNDCNS990RL990 D911C381C387IC302 C386C380R380R381R3

– 49 –MD-M3/M178 9 10 11 12Figure 49 WIRING SIDE OF P.W.BOARD (6/8)+-+-123456721 345678CHASSISGNDDISPLAY PWBAP34 5-HCNP990CNS990CFWR11D905TP910R909D9

– 5 –MD-M3/M1 Display window1. Level Meters2. Character Information Display3. Surround Indicator4. Extra Bass Indicator5. FM Stereo Indicator6. FM St

MD-M3/M1– 50 –Figure 50 SCHEMATIC DIAGRAM (13/14)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 26.TP1303TP160730292827262524 23 2221

– 51 –MD-M3/M178 9 10 11 12Figure 51 SCHEMATIC DIAGRAM (14/14)• The numbers 1 to 24 are waveform numbers shown in page 55 and 56.TP1411TP1216TP1

MD-M3/M1– 52 –ABCDEFGH123456Figure 52 WIRING SIDE OF P.W.BOARD (7/8)2825201510511354810141571485MD PICKUP UNITFLEXIBLEPWBMD MAIN PWB-D (TOP VIEW)128 1

– 53 –MD-M3/M178 9 10 11 12Figure 53 WIRING SIDE OF P.W.BOARD (8/8)112510131520242530353637404548GDSGDS21DGS11 15 16 20156102630 35 40 455051556065707

MD-M3/M1– 54 –WAVEFORMS OF CD CIRCUITTFDOTDOStoppedCH1=500mVDC 10:1CH3=500mVDC 10:1500ms/div(500ms/div)NORM:20kS/s13=Record Length=Smoothing : O

– 55 –MD-M3/M1WAVEFORMS OF MD CIRCUIT1997 / 08 / 04 09:30:15TTP1201(EFMMON)NORM: 100M S/sCH1 500mVAC 10:1500ns/divT1Record LenSMOOTH OFFBW

MD-M3/M1– 56 –Record LenSMOOTH OFFBW FULLCH1 0.000VCH2 0.000VMain 10KHold OffMINTriggerAUTOEDGE CH2Zoom 100CH

– 57 –MD-M3/M1TROUBLE SHOOTINGWhen the CD does not functionWhen the CD section does not operate when the objective lens of the optical pickup is dirty

MD-M3/M1– 58 –If the level is not normal, check around pins 27~29 on IC1.1. Is focus servo activated? (Waveform drawing 58-2) Pins 1~11 on IC1Check th

– 59 –MD-M3/M1The tracking servo is not activated.Check the peripheral circuits at pins 18 and 19 on IC1, pin 23 onIC2, and CNS2.If the waveform shown

MD-M3/M1– 6 – Remote control1. Remote Control Transmitter LED2. Surround Button3. Clock Button4. Timer Button5. Name/TOC Edit Button6. Sleep Button7.

MD-M3/M1– 60 –Is pin 35 (C2F) on IC2 "L"?YesNoThe HF waveform is normal and the time is displayednormally, but no sound is produced. Or the

– 61 –MD-M3/M1Is power turned on in the MD position when the remotecontroller or main unit MD STOP button is pressed?NoCheck as stated in item "M

MD-M3/M1– 62 –• Disc loading is not normal.Is disc loaded when it is inserted?NoYesNoCheck IC1401.NoCheck CN1601 and SW1956.YesNoCheck CN1604 and IC1

– 63 –MD-M3/M1• Normal playbackIs initialization performed normally when high reflection disc isplayed back?Does disc rotate normally?No NoCheck IC120

MD-M3/M1– 64 –• Record and playback operationInsert the low reflection disc, and after verifying the audio output in the normal mode playback set the

– 65 –MD-M3/M1• Disc motor fails to runNoCheck soldering joint and parts of pins 24 and 25 of IC1201, andperipheral circuit.Does waveform appear on t

MD-M3/M1– 66 –FUNCTION TABLE OF ICIC1 VHiLA9235M/-1:Servo Amp. (LA9235M)REFLA9235MREFREFREFREFREFREFREFREFAGCONODRVAGCONODRVREFREFLPFLPFAPCODRVREFREF

– 67 –MD-M3/D11 PDO1 Output – For PULL Phase-comparison output terminal for built-in VOC control.2 PDO2 Output – Phase-comparison output terminal for

MD-M3/M1– 68 –44 LVDD – – L channel Power terminal for L channel.45 LCHO Output 1/2VDD D/A converter L channel output terminal.46 LVSS – – Ground term

– 69 –MD-M3/D1IC3 VHiLA6548//-1: Focus/Tracking/Spin/Sled Driver (LA6548)1 VCC Power supply. (pin24 and short)2 MUTE ON/OFF for all CH output.3* VIN1

– 7 –MD-M3/M1OPERATION MANUAL1SETTING THE CLOCK1Press the POWER button to turn the power on.2Press the CLOCK button.DISC TOCTRACKMEMORYRANDOMTOTALREMA

MD-M3/M1– 70 –ICD01 RH-iX0288AWZZ: System Microcomputer/FL Driver (iX0288AW) (1/2)1 CD_CE P16 Output Serial control chip enable for CD DSP.2 CD_INT P

– 71 –MD-M3/D151 VP VP – – Power for fluorescent drive. –30V52 S14 S20 Output Fluorescent segment drive.53 S13 S21 Output Fluorescent segment drive.54

MD-M3/M1– 72 –1 REC OUT Channel 1 REC OUT terminal. Useable for spare input terminal.2 IN A13 IN B1Channel 1 input terminal.4 IN C15 IN D16 TONEH1 Cha

– 73 –MD-M3/D1ICP12 VHiLA2610//-1: Surround (LA2610)1 2 3 4 6 7 8 9 10 11 12SWASWVccVcc4.5~12VREFL-INBBAON/OFFLEVELBASSANALOGSURROUND1u 1u0.1u 18K220

MD-M3/M1– 74 –– MEMO –

– 75 –MD-M3/D1PARTS GUIDENOTE:Parts marked with “ ” are important for maintaining the safety of the set.Be sure to replace parts with specified ones f

PRICERANKDESCRIPTIONNO.PARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONMD-M3/M1– 1 –INTEGRATED CIRCUITSIC1 VHILA9235M/-1 J AQ Servo Amp.,LA9235MIC2 VHILC7

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONMD-M3/M1LV91 VP-XH2R2K0000 J AB 2.2 µH,ChokeR1535~1538 RCILZ2134SCZZ J Impeder,Z213

PRICERANKDESCRIPTIONNO.PARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONMD-M3/M1C1118 VCKYTV1CF105Z J AB 1 µF,16VC1119 VCKYTV0JB105K J AD 1 µF,6.3VC1120 VC

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONMD-M3/M1R40 VRD-ST2CD102J J AA 1 kohm,1/6WR42 VRD-ST2CD124J J AA 120 kohms,1/6WR43

MD-M3/M1– 8 – If a problem occursIf this unit functions abnormally during operation, first check the following items. If the unit continues to fun

PRICERANKDESCRIPTIONNO.PARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONMD-M3/M1R1711,1712 VRS-TV2AB120J J AA 12 ohms,1/10WR1713 VRS-CY1JB104J J AA 100 koh

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONMD-M3/M1CNS13 QCNWN6616AFZZ J AK Connector Ass’y,4-4Pin(MD-M3 Only)CNS15 QCNWN1440A

PRICERANKDESCRIPTIONNO.PARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONMD-M3/M1306 GITAS0058AWSA J AP Side Panel,Left (For MD-M3)306 GITAS0058AWSB J AP Si

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONMD-M3/M1OTHER SERVICE PARTS88GMMD-213A J Pre Adjustment Disc Test MD[TEAC]QCNWK0059

MD-M3/M1ABCDEFGH123456Figure 9 CD MECHANISM EXPLODED VIEW– 9 –307-1703304703303302704301M1702x2306x2SW2M2306PWB-F307-3307-2307701305

MD-M3/M1Figure 10 MD MECHANISM EXPLODED VIEWABCDEFGH123456– 10 –M902M903M901606x232602602312329146-16-26603x2603x213SW1952SW1956SW1955SW1954SW1953282

MD-M3/M1ABCDEFGH123456– 11 –MD PWB-DMAIN PWB-ACD MECHANISMPOWER/TUNERPWB-C1305-2305-1306310358317615615615612615x2603x3615x2614x2614x23493603593373243

MD-M3/M1ABCDEFGH123456– 12 –SP3 (L-CH)SP4 (R-CH)SP1 (L-CH)SP2 (R-CH)SP3 (L-CH)SP4 (R-CH)TweeterTweeterCapacitorCapacitorSP1 (L-CH)SP2 (R-CH)WooferWoof

MD-M3/M1ABCDEFGH123456Figure 13 SPEAKER EXPLODED VIEW– 13 –BlackSP1 (L-CH)SP2 (R-CH)Full-RangeSP1,2901903904902905x4SPEAKER CP-M1

MD-M3/M1PACKING METHOD (FOR U.S.A. ONLY)Setting position of switches and knobsAUX INPUT LEVEL MAXDEMO ON0206Front02050460Front0206Front0205BackFrontS

– 9 –MD-M3/M1MD MICRO SYSTEMQuick Guide/Guía rápidaMD-M3● Remote control x 1●Controlador remoto x 1Remote SensorSensor remoto2Preparation for use / Pr

MD-M3/M1A0215A0215FrontFrontA0215FrontFront12233FrontC0735C0735C0735C07351223SPAKP0058AWZZPolyethylene Bag,SpeakerSPAKZ0464AWZZ (For CP-M3)SPAKZ0510AW

MD-M3/M1– 16 –0205020504610461046104610205020502050205020502060206020602060206020602061235676533344442111122223344552FINISHFINISH FINISHPacking Add.,T

MD-M3/M1COPYRIGHT 1999 BY SHARP COPORATIONALL RIGHTS RESERVED.No part of this publication may be reproduced,stored in a retrieval system, or tran