Sony MDS-PC2 User Manual

1MICROFILMMDS-PC2SPECIFICATIONSSERVICE MANUALMINIDISC DECKModel Name Using Similar Mechanism MDS-S40MD Mechanism Type MDM-5AOptical Pick-up Type KMS-2

10Fig. 1 Reading the Test Mode Display(During recording and stop)RTs@@c##c**Fluorescent display tube display@@ : Cause of retry## : Number of retries*

11Reading the Display:Convert the hexadecimal display into binary display. If more than two causes, they will be added.Example When 84 is displayed:Hi

12This section is extracted frominstruction manual.Location of Parts and ControlsSECTION 2GENERALFront Panel2467891011135

13SECTION 3DISASSEMBLYNote: Follow the disassembly procedure in the numerical order given.3-1. CASE AND FRONT PANEL3-2. MD MECHANISM8 Front panel

143-4. BASE UNIT (MBU-5A) AND BD BOARD3-3. SLIDER (CAM)6 Slider (Cam)2 Bracket (Guide L)5 Bracket (Guide R)3 Leaf spring1 Two screws (BTP 2.6 x 6)

153-5. SW BOARD AND LOADING MOTOR (M103)5 Three screws (BTP2.6 x 6)4 Loading motor (M103)6 SW board2 Gear B3 Two screws (PWH 1.7 x 3)1 Screw (

16SECTION 4TEST MODE4-1. PRECAUTIONS FOR USE OF TEST MODE• As loading related operations will be performed regardless of the test mode operations bei

174-5. SELECTING THE TEST MODEThere are 27 types of test modes as shown below. The groups can be switched by pressing the = and = buttons. After s

184-5-1. Operating the Continuous Playback Mode1. Entering the continuous playback mode1 Set the disc in the unit. (Whichever recordable discs or disc

194-6. FUNCTIONS OF OTHER BUTTONSContentsSets continuous playback when pressed in the STOP state. When pressed during continuous playback, the trackin

2SELF-DIAGNOSIS FUNCTIONThe self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and err

20(PRECSYNCL.SYNCOVERBA-TRACKDISCSLEEPMONOWhen OffContentsDisplayWhen LitDuring continuous playback (CLV: ON)Tracking servo OFFRecording mode ONCLV lo

215-1. PARTS REPLACEMENT AND ADJUSTMENT• Check and adjust the MDM and MBU as follows.The procedure changes according to the part replacedSECTION 5ELE

225-2. PRECAUTIONS FOR CHECKING LASER DIODEEMISSINONTo check the emission of the laser diode during adjustments, neverview directly from the top as th

235-6. CHECKS PRIOR TO REPAIRSThese checks are performed before replacing parts according to“approximate specifications” to determine the faulty locat

245-6-4. Focus Bias CheckChange the focus bias and check the focus tolerance amount.Checking Procedure :1. Load a test disk (MDW-74/AU-1).2. Rotate th

255-7. INITIAL SETTING OF ADJUSTMENT VALUENote:Mode which sets the adjustment results recorded in the non-volatilememory to the initial setting value.

266. Press the = , + buttons so that the reading of the laserpower meter becomes 6.9 to 7.1 mW, press the ^ “PRO-GRAM” button and save it.Note :

2711. Press the = , + buttons until the waveform of the oscil-loscope moves closer to the specified value.In this adjustment, waveform varies at in

285-13. ERROR RATE CHECK5-13-1. CD Error Rate CheckChecking Procedure :1. Load a check disc (MD) TDYS-1.2. Press the + button and display “CPLAY MOD

29NOTE:It is useful to use the jig. for checking the waveform. (Refer to Ser-vicing Note on page 6.)5-15. ADJUSTING POINTS AND CONNECTING POINTS[BD BO

3Displays the recording time.Displayed as “rππππππh”.The displayed time is the total time the laser is set to the high power state.This is about 1/4 o

30SECTION 6DIAGRAMS6-1. CIRCUIT BOARDS LOCATIONBack up boardSW boardBD boardPanel boardMain boardPower board

31 31MDS-PC26-2. BLOCK DIAGRAM – BD SECTION –HR901OVER WRITEHEADHEADDRIVEQ181,1823612FILTERPCOFILIFILOCLTVPLLEFM,ACIRC,ENCODER/DECODERRF AGC & EQA

32 32MDS-PC2– MAIN SECTION –1RM523801716181219422614132415746618717872313332697775535168705960547667655655737947302849151312359719343750310DIN0DIN1DOU

33 33MDS-PC2– MAIN SECTION –IC701 !£ (XOUT)IC201 !™ (SYSCLK)IC201 !¶ (LRCK1)IC201 !§ (BCK)– PANEL SECTION –IC901 %• (OSCO)3.4Vp-p2.822MHz3.0Vp-p22.581

34 34MDS-PC26-3. PRINTED WIRING BOARD – BD SECTION –• See page 30 for Circuit Boards Location.D101 A-1D181 D-3D183 D-3IC103 B-1IC123 D-2IC171 D-1Q102

35 35MDS-PC26-4. SCHEMATIC DIAGRAM – BD (1/2) SECTION –• See page 33 for Waveform.• See page 45 for IC Block Diagrams.• See page 48 for IC Pin Functio

36 36MDS-PC26-5. SCHEMATIC DIAGRAM – BD (2/2) SECTION –• See page 33 for Waveform.• See page 34 for Printed Wiring Board.(Page 35)(Page 35)(Page 35)(P

37 37MDS-PC26-6. SCHEMATIC DIAGRAM – MAIN (1/2) SECTION –• See page 33 for Waveform.• See page 39 for Printed Wiring Board.(Page 44)(Page 36)(Page 42)

38 38MDS-PC26-7. SCHEMATIC DIAGRAM – MAIN (2/2) SECTION –• See page 33 for Waveform.• See page 47 for IC Block Diagrams.(Page 37)(Page 3

39 39MDS-PC26-8. PRINTED WIRING BOARD – MAIN SECTION –• See page 30 for Circuit Boards Location.INOUTLLRRLINE(ANALOG)• SEMICONDUCTORLOCATIOND390 A-2D3

4CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in hazardous ra-diation exposure.Notes

40 40MDS-PC26-9. SCHEMATIC DIAGRAM – PANEL SECTION –• See page 33 for Waveform.(Page 38)MAINBOARD(2/2)

41 41MDS-PC26-10. PRINTED WIRING BOARD – PANEL SECTION –• See page 30 for Circuit Boards Location.(Page 39)MAIN BOARD

42 42MDS-PC26-11. SCHEMATIC DIAGRAM – POWER SECTION –(Page 37)(Page 36)BD BOARD(2/2)MAINBOARD(1/2)IN 1 IN 2OUTDIGITAL(OPTICAL)RESET

43 43MDS-PC26-12. PRINTED WIRING BOARD – POWER SECTION –• See page 30 for Circuit Boards Location.• SEMICONDUCTORLOCATIOND431 C-2D432 C-2D433 C-2D466

44 44MDS-PC26-13. SCHEMATIC DIAGRAM – BD SWITCH SECTION –6-14. PRINTED WIRING BOARD – BD SWITCH SECTION –• See page 30 for Circuit Boards Location.(Pa

4510099 98 97 96 95 94 93EFMODVSSTEST3TEST2TEST1TEST0SPFDSPRD92SFDR91SRDR90FS489FRDR88FFDR87DVDD86TFDR85TRDR84LDDR83APCREF82DTRF81CKRF80XLRF79F0CNT78A

46• MAIN section34562871VADCNVADCPVINL2PGA PGA0DB/6DBSWITCHNOISE SHAPERINTERPOLATION FILTERDSP FEATURESPRAKDETECTORL3-BUSINTERFACEDECIMATION FILTERDIG

476-16. IC PIN FUNCTIONS• IC101 RF Amplifier (CXA2523AR) (BD board)Pin No.Pin Name I/O FunctionIJVCA to FPDAPCAPCREFGNDTEMPITEMPRSWDTSCLKXLATXSTBYF0CN

4812345678910111213141516171819202122232425262728293031 to 343536 to 4041424344454647• IC121 Digital Signal Processor, Digital Servo Signal Processor,

49FunctionPin No.Pin Name I/O484950, 5152535455565758596061626364656667686970717273747576777879808182838485D1D0D2, D3MVCIASYOASYIAVDDBIASRFIAVSSPCOFIL

5TABLE OF CONTENTS1. SERVICING NOTE ... 62. GENERAL ...

50FunctionPin No.Pin Name I/O8687888990919293949596 to 9899100TFDRDVDDFFDRFRDRFS4SRDRSFDRSPRDSPFDFGINTEST1 to TEST3DVSSEFMOO—OOOOOOOI (S)I—OTracking s

511, 23456789101112131415161718192021222324 to 272829303132333435363738 to 4142, 434445464748495051525354555657, 5859Pin No.Pin Name I/O Function• IC5

52Pin No.Pin Name I/OFunction60616263646566676869707172737475767778798081828384858687888990919293949596979899100PB-PREC/PB+3.3VNCGNDSDAMNT3 (SLOCK)WR

53327721926264FL701T90156551211115MDM-5Anot suppliednot suppliednot suppliednot suppliednot supplied#1#1#1#1#1#1#1#1#7#1not supplied771011118772214167

547-2. MECHANISM SECTION (MDM-5A)Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark515 4-996-227-01 LEVER (HEAD)516 4-996-229-0

557-3. BASE UNIT SECTION (MBU-5A)Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark565 4-996-261-01 GEAR (SL-B)566 4-996-264-01

56SECTION 8ELECTRICAL PARTS LISTNote:Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark• SEMICONDUCTORSIn each case, u: µ , fo

57Ref. No. Part No. Description Remark Ref. No. Part No. Description RemarkIC152 8-759-430-25 IC BH6511FS-E2IC171 8-759-487-04 IC BR24C02F-E2IC181

58Ref. No. Part No. Description Remark Ref. No. Part No. Description RemarkC102 1-124-779-00 ELECT CHIP 10uF 20% 16VC181 1-126-395-11 ELECT 22uF 20% 1

59Ref. No. Part No. Description Remark Ref. No. Part No. Description RemarkPANELR189 1-216-037-00 METAL CHIP 330 5% 1/10WR191 1-216-057-00 METAL CHIP

6SECTION 1SERVICING NOTEJIG FOR CHECKING BD BOARD WAVEFORMThe special jig (J-2501-149-A) is useful for checking the waveform of the BD board. The name

60Ref. No. Part No. Description RemarkRef. No. Part No. Description Remark< DIODE >D411 8-719-210-39 DIODE EC10QS04-TE12L5D412 8-719-210-39 DI

61Ref. No. Part No. Description RemarkRef. No. Part No. Description Remark< COIL >L751 1-216-296-91 SHORT 0L752 1-216-296-91 SHORT 0L753 1-216-2

62Sony CorporationHome Audio Company9-928-916-11(SP)99F0986-1Printed in Japan © 1999. 6Published by Quality Assurance Dept.MDS-PC2

7IOP DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC171 OFBD BOARD) ARE REPLACEDThe IOP value labeled on the optical pick-

8CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTSBefore performing repairs, perform the following checks to determine the faulty locations up to a ce

9Back up boardFLUORESCENT DISPLAY TUBE ALL LIGHTING AND KEY CHECK MODEIn this mode, the fluorescent display tube check and key check can be performed.