Sharp MD-X8 Service Manual Page 1

– 1 –MD-X8 CONTENTSMD-X8SERVICE MANUALSHARP CORPORATIONNo. S0778MDX8//// • In the interests of user-safety the set should be restored to its original

MD-X8– 10 –Figure 10-2Figure 10-3Figure 10-1Push the pawl of disc tray with a proper screwdriver.Back surfacePawlDisc Tray 1Disc Tray 2Disc Tray 3Pawl

PRICERANKDESCRIPTIONNO.PART CODE NO. PARTS CODEPRICERANKDESCRIPTIONMD-X8M903 RMOTV0014AWM1 J AQ MD Loading Motor Ass’ySW1952A/B QSW-P0006AWZZ J AG Swi

NO.PRICERANKDESCRIPTIONPARTS CODENO. PART CODEPRICERANKDESCRIPTIONMD-X8280 MSPRD0108AWFJ J AC Spring,Fan Motor281 NBRGC0003AWZZ J AC Bearing Metal601

MD-X8ABCDEFGH123456Figure 11 MD MECHANISM EXPLODED VIEW– 11 –3539336M902M903M901606x342602602342432157603x2603x214SW1952A/BSW1956SW1955SW1954SW195331

MD-X8Figure 12 CD MECHANISM EXPLODED VIEWABCDEFGH123456– 12 –701304701302301702702303M701 703x2305x2SW702AM702308PWB-D306-2306704307306-1306-3

MD-X8Figure 13 CHANGER MECHANISM EXPLODED VIEWABCDEFGH123456– 13 –120120119120119109114803x213110180280280280312980mm123x4MOB1121SWB101 ~104MOB2801

MD-X8ABCDEFGH123456– 14 –Figure 14 CABINET EXPLODED VIEW609266272608255275CD ChangerBlockPWB-B1PWB-C8PWB-B2PWB-APWB-C7PWB-C2PWB-C3PWB-C4PWB-C6PWB-C1M

MD-X8ABCDEFGH123456– 15 –Figure 15 SPEAKER EXPLODED VIEWSHARP912x2903904911x4SP3 (L-CH)SP4 (R-CH)910x4906x4901902910x4SP1 (L-CH)SP2 (R-CH)909905907908

MD-X8PACKING OF THE SET– 16 –FRONTSpeakerMAIN UNITFRONTFrontFRONTTOPL MarkR MarkSSAKH0022AWZZPolyethylene Bag, UnitSPAKA0133AWZZPacking Add., Left/Ri

MD-X8COPYRIGHT 1997 BY SHARP COPORATIONALL RIGHTS RESERVED.No part of this publication may be reproduced,stored in a retrieval system, or tran

– 11 –MD-X8Figure 11-2Figure 11-3Figure 11-1SPEAKERFigure 11-4(X1)x4ø1.7x8.9mmMD MechanismFrame24Pin Flat Cable (42)Copper foil tapeSolder jointCNS190

MD-X8– 12 –How to remove the sled motor/loading motor(See Fig. 12-4)1. Remove the screws (D1) x 4 pcs., and remove the sledmotor/loading motor.Caution

– 13 –MD-X8Figure 13-1Figure 13-2How to remove the spindle motor(See Fig. 13-1)1. Remove the screws (E1) x 3 pcs., and remove the spidlemotor.Caution:

MD-X8– 14 –Figure 14-1Figure 14-2CD MECHANISM SECTIONFor the procedure to remove the CD mechanism from themain unit, refer to Disassembling Procedure,

– 15 –MD-X8ADJUSTMENTfL: Low-range frequencyfH: High-renge frequency• AM adjustment and confirmationFigure 15-1 AM IFTUNER SECTION• TEST mode setting

MD-X8– 16 –CD TEST MODECD test mode settingAny one of test mode can be set by pressing several buttons as follows.Holding down CD PLAY/PAUSE and TACK

– 17 –MD-X8Figure 171. Preparation for adjustmentTest discMD SECTIONType Test discPart No.Price Code1 High reflection disc TGYS1 (SONY) RRCDT0101AFZZ

MD-X8– 18 –• Test Mode1. AUTO pre-adjustment mode • Automatic pre-adjustment is performed. (After adjustment the grating adjustment mode is set.)• The

– 19 –MD-X8Step 1 Testmode STOP state [ t s m e ]Step 2Press the CD PLAY button three times.RESULT sub-menu [ _ R S T _ Y O B I _ ]Step 3 Press onc

MD-X8– 2 –SPECIFICATIONSFOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFERTO THE OPERATION MANUAL.Specifications for this model ar

MD-X8– 20 –Step 1 Testmode STOP state [ t s m e ]Step 2Press the CD PLAY button four times.RESULT menu [ _ R E S U L T _ _ _ ]Step 3 Press once the

– 21 –MD-X8• If the VOL UP/VOL DOWN button is pressed during setting indication, the setting increases/decreases, and the new setting is stored in RAM

MD-X8– 22 –Step 9 Press once the CD PLAY button. Comparison level setting in case of FOK generation [ F O K L E V f _ ](when focus is "ON"

– 23 –MD-X8Step 18 Press once the CD PLAY button. TCRS comparison level 1 for high reflection [ T C R S C 1 P _ ]Step 19 Press once the CD PLAY butt

MD-X8– 24 –e) TEMP settingStep 1 Testmode STOP state [ t s m e ]Step 2Press the CD PLAY button seven times.EEPROM setting menu [E E P R O M _ S E T

– 25 –MD-X88. TEST-PLAY modeStep 1 Testmode STOP state [ t s m e ]Step 2 Press the CD MD EDIT button. TEST-PLAY menu [ T E S T _ P L A Y _ ]Step 3

MD-X8– 26 –11. EJECT modeStep 1 Testmode EJECT state [ _ _ E J E C T _ _ _ ]Step 2 Press oncethe CD STOP button. Max. power output state [ x p w _ _ _

– 27 –MD-X8• Defect occurred successively 10 times during REC-PLAY.• As a result of occurrence of defect during REC-PLAY therecordable cluster became

MD-X8– 28 –• UTOC was read but total TNO and the number of characters ofNAME was 0?• Focusing error was caused by shock during REC-PLAY.• Although UTO

– 29 –MD-X8 E2-PROM Data ListFocus settingItem indicationSettingF G 9 7 HF F 1 9 E HF F 2 E 0 HF Z H L E V E D HF O K L E V n 0 8 HF O K L E

– 3 –MD-X8NAMES OF PARTSFRONT PANEL 1.Power Button: POWER 2.Remote Control Sensor 3.MD MD Edit Button: MD MD 4.CD Tra

MD-X8– 30 – E2-PROM Setting Mode ChartCD PLAYRECS P K L E V m _A D J T T M _ _CD PLAYCD PLAY RECRECH D E Q A D _ _L D E Q A D _ _CD PLAYCD PLAY RECREC

– 31 –MD-X8NOTES ON SCHEMATIC DIAGRAM• Resistor:To differentiate the units of resistors, such symbol as K and M areused: the symbol K means 1000 ohm a

MD-X8– 32 – Figure 32 WIRING BLOCK DIAGRAM (1/2)CNP905111314IC902CNP961CNS100CNP985CNP9751115612CNP930CNP940CNP915CNP900CNP980CNP741CNP751133342BI752B

– 33 –MD-X8 Figure 33 WIRING BLOCK DIAGRAM (2/2)SW901CNP910CNP920CNS950BCNP97011115144P90511314GY16WHCNP9901167UNA901JK902CNP9951BKWH211113CNP999CNS10

MD-X8– 34 – Figure 34 BLOCK DIAGRAM (1/4)D6.5/4.75 ~ 5.25VMECHANISM, ACTUATOR6.5/4.75V5.25VD3.2VAVCCDVDDDVDDD3.2VDIGITAL3.2VD3.2VD4.3VA3.2VD4.3VD3.2VD

– 35 –MD-X8 Figure 35 BLOCK DIAGRAM (2/4)123419867201213242530312232343536101127 262829PU-IN SWXL116.934MHzXINLD0FIN2JP–CV+SLCSLFIN1EFTOFDSPOSPSLDSL–S

MD-X8– 36 – Figure 36 BLOCK DIAGRAM (3/4)TO µ-COM227451376817151411121618121061310721222324179854275436211201115167312138+B45VAM OSC.T302AM RFAFC91214

– 37 –MD-X8 Figure 37 BLOCK DIAGRAM (4/4)2112831514101613117914111213816284314857314857315122213983433323127121025242374862712611527281817251110242028

MD-X8– 38 –Figure 38 SCHEMATIC DIAGRAM (1/20)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.87645321432111109876453211110987645321

– 39 –MD-X8Figure 39 SCHEMATIC DIAGRAM (2/20)78 9 10 11 121234567812345678910 111314 1216171819 152122 201 23 4 56 78 910 11 1213141516171819202122232

MD-X8– 4 –REMOTE CONTROL 1.Record Mode Button: REC MODE 2.Record Button: 3.Clear Button: CLEAR 4.Program Button: PRGM 5.Play Mode Button: P-MODE 6.Syn

MD-X8– 40 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.Figure 40 SCHEMATIC DIAGRAM (3/20)P43 12-B P42 1-GC998 0.1/50Q998KRC1

– 41 –MD-X8Figure 41 SCHEMATIC DIAGRAM (4/20)78 9 10 11 12FM SIGNALCD SIGNALP42(1-G) P43(6-A)161514131211109876543218765432121654321321221124232221201

MD-X8– 42 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.Figure 42 SCHEMATIC DIAGRAM (5/20)1234567891011121314+B+B+B23 24 25 26 2

– 43 –MD-X8Figure 43 SCHEMATIC DIAGRAM (6/20)78 9 10 11 122930 31 3233 342221201918171615151413121110916876543211098765432164 63 62 61 60 59 58 57 56

MD-X8– 44 –Figure 44 WIRING SIDE OF P.W.BOARD (1/10)ABCDEFGH1234561458BBCEBCEBCEBCEBBCECEBBCEBCE332121213CE321C354C398R353R352C399CF351R355C358C357R36

– 45 –MD-X8Figure 45 WIRING SIDE OF P.W.BOARD (2/10)78 9 10 11 1291681BCEBCEBCER1071R1069Q371BBBCEWHGYCEBCECER360R371R37215123456101112152022R373R374L

MD-X8– 46 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.Figure 46 SCHEMATIC DIAGRAM (7/20)17181920 21 2223 24 25 262728 2930 313

– 47 –MD-X8Figure 47 SCHEMATIC DIAGRAM (8/20)78 9 10 11 12• The numbers 1 to 11 are waveform numbers shown in page 69.54321765432176543211413121

MD-X8– 48 –Figure 48 WIRING SIDE OF P.W.BOARD (3/10)ABCDEFGH123456MD OPTICALPICK UP UNITCNP1252CNS1101FLEXIBLE PWBTO MD MAIN PWBTO MD MAIN PWB12VLVLMA

– 49 –MD-X8Figure 49 WIRING SIDE OF P.W.BOARD (4/10)78 9 10 11 12• The numbers 1 to 11 are waveform numbers shown in page 69.R615J675R611R621R60

– 5 –MD-X8OPERATION MANUALSETTING THE CLOCKWhen you have set the date and time, this unit can be usedas a clock. It can be used for timer recording or

MD-X8– 50 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.Figure 50 SCHEMATIC DIAGRAM (9/20)43218765432121876543214321313029282726

– 51 –MD-X8Figure 51 SCHEMATIC DIAGRAM (10/20)78 9 10 11 121211109876543214321655665876543216543218743218743218743211211109876543214321123456789101112

MD-X8– 52 –Figure 52 WIRING SIDE OF P.W.BOARD (5/10)ABCDEFGH123456R792R788C77411591015182345678C771C772C773IC771R776R787R777R778R786R785R784R783R782R7

– 53 –MD-X8Figure 53 WIRING SIDE OF P.W.BOARD (6/10)78 9 10 11 12R705R713R711R706R704 R703R702R701R714C7013REMOTE SENSOR21C703SW706MD EJECTSW705MD REC

MD-X8– 54 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.Figure 54 SCHEMATIC DIAGRAM (11/20)3211413121110987654321151413121110987

– 55 –MD-X8Figure 55 SCHEMATIC DIAGRAM (12/20)78 9 10 11 12123Q274KRC107 MR270270L801LINEFILTERR8124.7M21876543218765432121876543214321212117.8V0V 0.7

MD-X8– 56 –Figure 56 WIRING SIDE OF P.W.BOARD (7/10)ABCDEFGH123456R812R801BI850/CNS85012345678C807C806D814D820C805F805 1.6A L 250VF803 5A L 125VF802

– 57 –MD-X8Figure 57 WIRING SIDE OF P.W.BOARD (8/10)78 9 10 11 12CNP850R873C801D871Q871C802R871D801C872Q862D872Q863R865R866R868BI830/CNS83021R869C831R

MD-X8– 58 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.Figure 58 SCHEMATIC DIAGRAM (13/20)SITUATION :12345678910111213 14 15 16

– 59 –MD-X8Figure 59 SCHEMATIC DIAGRAM (14/20)78 9 10 11 12• The numbers 1 to 24 are waveform numbers shown in page 70 and 71.123456789101112131

MD-X8– 6 –REMEDY• Insert properly.• Replace the batteries.• Operate it within a range of 8" (0.2 m) to 20' (6 m)and within an angle of 15° t

MD-X8– 60 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.Figure 60 SCHEMATIC DIAGRAM (15/20)SITUATION :12345678910201918171615141

– 61 –MD-X8Figure 61 SCHEMATIC DIAGRAM (16/20)78 9 10 11 12• The numbers 1 to 24 are waveform numbers shown in page 70 and 71.6543210928 27 26 2

MD-X8– 62 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.Figure 62 SCHEMATIC DIAGRAM (17/20)SITUATION :12345123456714 13 12 11 10

– 63 –MD-X8Figure 63 SCHEMATIC DIAGRAM (18/20)78 9 10 11 12• The numbers 1 to 24 are waveform numbers shown in page 70 and 71.12345678123456714

MD-X8– 64 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.Figure 64 SCHEMATIC DIAGRAM (19/20)SITUATION :12345678123451321234567892

– 65 –MD-X8Figure 65 SCHEMATIC DIAGRAM (20/20)78 9 10 11 12• The numbers 1 to 24 are waveform numbers shown in page 70 and 71.12345678910 11 12

MD-X8– 66 –Figure 66 WIRING SIDE OF P.W.BOARD (9/10)ABCDEFGH123456• The numbers 1 to 24 are waveform numbers shown in page 70 and 71.FLEXIBLEPWB

– 67 –MD-X8Figure 67 WIRING SIDE OF P.W.BOARD (10/10)78 9 10 11 12• Through-hole where the top, bottom and +B patterns are connected.• Through-hole wh

MD-X8– 68 –VOLTAGE (MD MAIN PWB)5V5V43VBCEPINNO.VOLTAGEQ18010V0V0.15VBCEPINNO.VOLTAGEQ18020V0V3.1VBCEPINNO.VOLTAGEQ18033.95V3.2V3.3VBCEPINNO.VOLTAGEQ1

– 69 –MD-X8WAVEFORMS OF CD CIRCUIT35ms0.50 VIC1 20 F.E15ms5.0 VIC1 54 DRFSTOP PLAYFOCUS SERCH210.5ms1.00 V HF0.5ms5.0 V HFL0.5ms5.0 V TES123CUE

– 7 –MD-X8POWERMD / CD STEREOMD-X8Quick-GuideGuía rápidaConexiónConnectionTurning thepower on and offConexión ydesconexión de laalimentaciónRemote con

MD-X8– 70 –WAVEFORMS OF MD CIRCUIT1997 / 08 / 04 09:30:15TTP1274(EFMMON)NORM: 100M S/sCH1 500mVAC 10:1500ns/divT1Record LenSMOOTH OFFBW FU

– 71 –MD-X8Record LenSMOOTH OFFBW FULLCH1 0.000VCH2 0.000VMain 10KHold OffMINTriggerAUTOEDGE CH2Zoom 100CH3

MD-X8– 72 –TROUBLESHOOTING (CD SECTION)When the CD does not functionWhen the CD section does not operate When the objective lens of the optical pickup

– 73 –MD-X8• Playback can only be performed when disc isloaded.Is HF waveform normal (see the Figure 73-2, Figure73-3.)?Check the tracking system. Is

MD-X8– 74 –• Check the tracking system.Data cannot be read.Check the waveform of IC1 pin 7 (TE).The waveform shown in Figure 74-1appears, and no disc

– 75 –MD-X8• Although HF waveform is normal and timeindication is normal, no sound is not output.Check the IC2 pin 48 (EFLG).Check the IC2 pin 37 and

MD-X8– 76 –TROUBLE SHOOTING (MD SECTION)Is power turned on in the MD position when the remotecontroller or main unit MD STOP button is pressed?NoCheck

– 77 –MD-X8• Disc loading is not normal.Is disc loaded when it is inserted?NoYesNoCheck IC1401.NoCheck CNP1601 and SW1956.YesNoCheck CNP1604 and IC16

MD-X8– 78 –• Normal playbackIs initialization performed normally when high reflection disc isplayed back?Does disc rotate normally?No NoCheck IC1201Is

– 79 –MD-X8• Record and playback operationInsert the low reflection disc, and after verifying the audio output in the normal mode playback set the re

MD-X8– 8 –Caution on DisassemblyWhe disassembling the machine or assenbling it afterrepair, observe the following instructions so as to ensuresafety a

MD-X8– 80 –• Disc motor fails to runNoCheck soldering joint and parts of pins 24 and 25 of IC1201, andperipheral circuit.Does waveform appear on the

– 81 –MD-X8IC901 RH-iX2679AFZZ:System Control Micon (iX2679AF) (1/3)1 RESET P60 Output Reset signal for MD microcomputer2 S-ID P61 Output Track mark

MD-X8– 82 –IC901 RH-iX2679AFZZ:System Control Micon(iX2679AF) (2/3)33 TRAY SW-A P124 Input Main tray OPEN completion detection switch inputH: OPEN c

– 83 –MD-X8IC901 RH-iX2679AFZZ:System Control Micon(iX2679AF) (3/3)74 COIN SO0 Output Serial output of command data to CD DSP75 CQCK SCK0 Output Seri

MD-X8– 84 –Figure 84 BLOCK DIAGRAM OF ICIC901 RH-iX2679AFZZ:System Control Micon(iX2679AF)(Allocation through CD DSP expansion port)CD EH mechanism

– 85 –MD-X81 RF1 RF signal input terminal 1 Input of RF signal output of pickup2 RF2 RF signal input terminal 2 Input of RF signal output of pickup3 R

MD-X8– 86 –1* EFMMON Output EFM monitor output2 AVCC — Analog power3 EFMI Input EFM signal input from RF amp.4 AGND — Analog GND5 AIN Input Focus erro

– 87 –MD-X854 TESO1 Output PLLLR. Microcomputer extension output port 2 in case of selection55 TESO3 In/Output PLLOSC. Microcomputer extension outpu

MD-X8– 88 –1* P96/ANEX1 Output Input/Output it port P962* P95/ANEX0 Output Input/Output it port P963 P94/DA1 Output LDVAR (laser power adjustment outp

– 89 –MD-X852 P42/A18 In/Output SYS D2 (data bus 2)53 P41/A17 In/Output SYS D1 (data bus 1)54 P40/A16 In/Output SYS D0 (data bus 0)55* P37/A15 Output

– 9 –MD-X8Figure 9-2Figure 9-3Figure 9-1Figure 9-5Figure 9-4(J2) x2ø3 x8mm(J2) x1ø3 x8mm(J1) x4 ø3 x8mmMain ChassisSub ChassisCD Changer Block(K2) x3ø

MD-X8– 90 –Figure 90-1 BLOCK DIAGRAM OF ICIC1101 VHiiR3R55//-1:RF Signal Processor (IR3R55)IC1201 VHiLR37648/-1:ENDEC (LR37648)Figure 90-2 BLOCK DIAG

– 91 –MD-X8PARTS GUIDENOTE:Parts marked with “ ” are important for maintaining the safety of the set.Be sure to replace parts with specified ones for

PRICERANKDESCRIPTIONNO.PART CODE NO. PARTS CODEPRICERANKDESCRIPTIONMD-X8– 1 –INTEGRATED CIRCUITSIC1 VHILA9241M/-1 J AS Servo Amp.,LA9241MIC2 VHILC7862

NO.PRICERANKDESCRIPTIONPARTS CODENO. PART CODEPRICERANKDESCRIPTIONMD-X8! T801 RTRNP0169AWZZ J BT PowerCOILSL1 VP-XHR82K0000 J AC 0.82 µHL203,204 RCIL

PRICERANKDESCRIPTIONNO.PART CODE NO. PARTS CODEPRICERANKDESCRIPTIONMD-X8C393 RC-GZA105AF1H J AB 1 µF,50V,ElectrolyticC394 RC-GZA476AF1C J AB 47 µF,16V

NO.PRICERANKDESCRIPTIONPARTS CODENO. PART CODEPRICERANKDESCRIPTIONMD-X8C1107 VCKYTV1HB472K J AA 0.0047 µF,50VC1109 VCKYTV0JB105K J AD 1 µF,6.3VC1110 V

PRICERANKDESCRIPTIONNO.PART CODE NO. PARTS CODEPRICERANKDESCRIPTIONMD-X8R227,228 VRD-ST2EE4R7J J AA 4.7 ohms,1/4WR229,230 VRD-ST2CD563J J AA 56 kohms,

NO.PRICERANKDESCRIPTIONPARTS CODENO. PART CODEPRICERANKDESCRIPTIONMD-X8R751 VRD-MN2BD684J J AA 680 kohms,1/8WR752 VRD-ST2CD104J J AA 100 kohm,1/6WR753

PRICERANKDESCRIPTIONNO.PART CODE NO. PARTS CODEPRICERANKDESCRIPTIONMD-X8R1409 VRS-CY1JB102J J AA 1 kohm,1/16WR1412 VRS-CY1JB104J J AA 100 kohm,1/16WR1

NO.PRICERANKDESCRIPTIONPARTS CODENO. PART CODEPRICERANKDESCRIPTIONMD-X8CNS2A/B QCNWN0859AWZZ J AF Connector Ass’y,7/7PinCNS3A/B QCNWN0857AFZZ J AK Con