Sharp MD-SR70H Service Manual Page 1

MD-SR505E/70H/70W– 1 –SHARP CORPORATIONMD-SR505E(S)MD-SR70H(BL)MD-SR70H(S)MD-SR70W(S)SERVICE MANUALNo. S3016MDSR70H/• In the interests of user-safety

MD-SR50H/50W/60E/60W– 7 –When the number of tracks used reachesthe limit, regardless of the remaining re-cording time, further recording will beimpos

MD-SR50H/50W/60E/60W– 8 –1 Bottom Cabinet 1. Screw ...(A1) x6 8-12 Top Cabinet 1. Open the Top cabinet. 8-12. Open the

MD-SR50H/50W/60E/60W– 9 –REMOVING AND REINSTALLING THE MAIN PARTSRemove the mechanism according to the disassembling meth-ods 1 to 4. (See Page 8.)How

MD-SR50H/50W/60E/60W– 10 – Entering the TEST mode1. Setting at port (power nonconnected state)(1) Set the port as follows. TEST1 : "Low&qu

MD-SR50H/50W/60E/60W– 11 – Operation in each TEST mode1. AUTO1 Mode• When the STOP button is pressed while the AUTO1 menu appears or during automat

MD-SR50H/50W/60E/60W– 12 –5. NORMAL Mode• When the STOP button is pressed while the NORMAL menu appears, the mode changes to the TEST mode stop state.

MD-SR50H/50W/60E/60W– 13 –EEPROM (IC402) writing procedure1. Procedure to replace EEPROM and write initial value of microcomputer in EEPROM(1) Replac

– 14 –MD-SR50H/50W/60E/60WSled settingItem display Set values EEPROM DATA LIST (EEPROM version b)TEMP settingItem display Set valuesT M _ _ Calc

– 15 –MD-SR50H/50W/60E/60W: Test Mode STOP: Pre-auto adjustment menu: ATT auto adjustment menu: Continuous record menu: EEPROM setting menu: INNER swi

– 16 –MD-SR50H/50W/60E/60W: ATT Autoadjustment menu: ATT adjustment error (adjustment value output): During ATT autoadjustmentAdjustment errorNormal e

MD-SR505E/70H/70W– 2 – MARK: SPARE PARTS-DELIVERY SECTION1 Not Used RPHoH0005AWZZ J Headphones [SR70W Only] AX2 RPHoH0001AWZZ J RPHoH0001AWZZ J Ea

– 17 –MD-SR50H/50W/60E/60W: Continuous record menuPLAYT R E CContinuous RrecordA P # # # #* When the [STOP] button is pressed in specific menu,

– 18 –MD-SR50H/50W/60E/60W: EEPROM setting menu: Focus setting menu: Spin setting menu: Tracking setting menu: Sled setting menu: BASS setting menu: T

– 19 –MD-SR50H/50W/60E/60W: Spin setting menuPLAYS p i nSpin SettingS P GS P iSKIP UP SKIP DOWNS P mSKIP UP SKIP DOWNS P oSKIP UP SKIP DOWNS P

– 20 –MD-SR50H/50W/60E/60W: Slide setting menuPLAYS l e dSled Setting S L G S L 2SKIP UP SKIP DOWN S L MSKIP UP SKIP DOWN S L VSKIP UP SKIP DOWN S

– 21 –MD-SR50H/50W/60E/60W: Digital EQ setting menuPLAY D E Q S E TDigital EQ SettingH Q 1H Q 2SKIP UP SKIP DOWNH S GSKIP UP SKIP DOWNH S OSKIP UP SK

– 22 –MD-SR50H/50W/60E/60WContinued from the preceding pageD R HSKIP UP SKIP DOWNP L ESKIP UP SKIP DOWNSKIP UP SKIP DOWNSKIP UP SKIP DOWNR C EE L TS L

– 23 –MD-SR50H/50W/60E/60WSW401 EJECT OFF—ONSW402 HOLD OFF—ONSW403 LID DETECTION OFF—ONSW902 DISC PROTECT OFF—ONNOTES ON SCHEMATIC DIAGRAM• Resistor:T

– 24 –MD-SR50H/50W/60E/60WVOLTAGEPIN NO. VOLTAGE PIN NO. VOLTAGE IC401PIN NO. VOLTAGE PIN NO. VOLTAGE PIN NO. VOLTAGE PIN NO. VOLTAGE 1 PIN NO.

– 25 –MD-SR50H/50W/60E/60W Figure 25 BLOCK DIAGRAM IC651MOTER DRIVERLB1930M VCCVCC VEEIC841 S8324A282.8V UP CONVERTERIC251 FTD2017IC253

– 26 –MD-SR50H/50W/60E/60W• The numbers 1 to 18 are waveform numbers shown in page 31.ABCDEFGH123456Figure 26 SCHEMATIC DIAGRAM (1/2)• NOTES ON

MD-SR505E/70H/70W– 3 –ABCDEFGH123456Figure 3 CABINET EXPLODED VIEW204MD MECHANISM210205203214234233213215202237601x2601x2216217603602211212218236601x2

– 27 –MD-SR50H/50W/60E/60W78 9 10 11 12Figure 27 SCHEMATIC DIAGRAM (2/2)6 5 4 3 2 1 TP842 TP841 TP805 5 4 3 2 1 6 5 4 3 2 1 6 5 4 3 2 1 8 7 6 5 4 3 2

– 28 –MD-SR50H/50W/60E/60W• The numbers 1 to 18 are waveform numbers shown in page 31. : Through-hole where the top, bottom and +B patter

– 29 –MD-SR50H/50W/60E/60W78 9 10 11 12Figure 29 WIRING OF P.W.BOARD (2/3)R723C723R724C724J702MIC INL704C503C500J701OPTICAL/LINE INC725C702C701C511R72

– 30 –MD-SR50H/50W/60E/60WFigure 30 WIRING OF P.W.BOARD (3/3)ABCDEFGH123456Optical Pickup Unit (15)Magnetic Head Flexible PWB (23)Magnetic Head (21)Me

– 31 –MD-SR50H/50W/60E/60WWAVEFORMS OF MD CIRCUITNORM:200kS / s1994 / 12 / 15 22:54:19=Filter= =Offset= =Record Length=Smoothiing : OFFBW : FULLC

– 32 –MD-SR50H/50W/60E/60WTROUBLESHOOTINGIt is advisable to use the TEST mode (refer to Error Data Display Mode, P19) indicating the causes of trouble

– 33 –MD-SR50H/50W/60E/60WYesCheck whether there is defective solder joint of audio signalline between IC703 and J703NoYesIs audio wavefrom output fro

– 34 –MD-SR50H/50W/60E/60W• The spindle motor fails to run.Does the head moveNoDoes the waveform appear on the IC201 pins 24 and 25 afterTEST mode AUT

– 35 –MD-SR50H/50W/60E/60W1 P12/TCLKA CIN Input Track cross signal/focus drive detection2 TCLKB SPIN Input Spindle motor FG pulse detection input3 P14

– 36 –MD-SR50H/50W/60E/60W58 MD1 MD1 Input Operation mode selection input 159 P23 _PLAY Input Unit PLAY button operation detection input60 WDTOVF WDTO

MD-SR505E/70H/70W– 4 –1051611201219672891315: Change PARTSCOPYRIGHT 2000 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication m

– 37 –MD-SR50H/50W/60E/60W52 EXPORT0 LDCNT1 Output Recording head raising-lowering control output 1 See the separate table *3.53 EXPORT1 LDCNT2 Output

– 38 –MD-SR50H/50W/60E/60W— M E M O —

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONMD-SR50H/50W/60E/60W– 1 –INTEGRATED CIRCUITSIC101 VHIIR3R55//-1 J AQ RF Signal Pro

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONMD-SR50H/50W/60E/60WC704 VCSATE0JJ476M J AD 47 µF,6.3V,Electrolytic,TantalumC711,71

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONMD-SR50H/50W/60E/60WR801 VHHSMDM110V-1 J AK Conductive Resin SwitchR802 VRS-CY1JB5

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONMD-SR50H/50W/60E/60W236 MSPRP0032AWFW J AB Spring A,Cartridge237 LHLDZ3012AWM1 J AF

MD-SR50H/50W/60E/60WABCDEFGH123456Figure 5 MD MECHANISM EXPLODED VIEW– 5 –M903M902M901503x2505x3508x2502x2350121235118-3(SW902)8-188-2(PH901)50450350

MD-SR50H/50W/60E/60WABCDEFGH123456Figure 6 CABINET EXPLODED VIEW– 6 –204242MD MECHANISM210205203214234233213215202237601x2601x221621760360221121221823

MD-SR50H/50W/60E/60WPACKING METHOD (MD-SR50H FOR U.K./SR60E ONLY)Setting position of switches and knobsUNIT HOLD OFFRemote Control HOLD CANCEL1051618(

MD-SR50H/50W/60E/60W— M E M O —– 8 –

MD-SR50H/50W/60E/60W– 2 –Figure 2-1 Figure 2-2Precaution to be taken when replacing and servicing the Laser Pickup.The AEL (Accessible Emission Level)

MD-SR50H/50W/60E/60WCOPYRIGHT 2000 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication may be reproduced,stored in a retrieval

MD-SR50H/50W/60E/60W– 3 –FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TOTHE OPERATION MANUAL. SPECIFICATIONSSpecifications f

MD-SR50H/50W/60E/60W– 4 –NAMES OF PARTS 1. Monaural Long-Play Mode Indicator 2. Record Indicator 3. Level Meter 4. Fast Play Indicator 5. Repeat

MD-SR50H/50W/60E/60W– 5 –OPERATION MANUALPOWER SOURCEYou can power this unit with an AC adaptor or a commercially available alkaline bat-tery (LR6, “A

MD-SR50H/50W/60E/60W– 6 –CONVENIENT OPERATION OF THE UNIT< How to read the battery indicator >● When the battery is completely discharged,the ba