Manuals / Sony / Home Audio / Stereo System

Sony HCD-MD373 service manual Over Write Head, OPTICAL PICK-UPOF MD KMS-260B/J1N

Models: HCD-MD373

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3-13. OVER WRITE HEAD

3-14. OPTICAL PICK-UP OF MD (KMS-260B/J1N)

2Screw (P 1.7x6)

3Over write head (HR901)

1 Flexible board

Note:

Turn the optical pick-up inside out, and pull out the flexible board.

1 Screw (B 2x8)

3Main shaft

5Optical pick-up (for MD)

4 Flexible board

2 Leaf spring (SHAFT)

3-15. SPINDLE MOTOR (M901) AND SLED MOTOR (M902) (MD)

4 Three screws (B 2x5)

3Gear (SL-B)

1Screw (M1.7)

2 Gear (SL-A)

6Two screws (P 1.7x2.5)

5 Spindle motor

(M901)

The BD (MD) board is soldered at two parts.

(See page 24.)

7Sled motor (M902)

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Sony HCD-MD373 service manual Over Write Head, OPTICAL PICK-UPOF MD KMS-260B/J1N, SPINDLE MOTOR M901 AND SLED MOTOR M902 MD

Contents

Sony Corporation SPECIFICATIONS9-928-998-12 SERVICE MANUALSELF-DIAGNOSISFUNCTION Table of Error Codes ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTSSelecting the Test Mode Flexible Circuit Board Repairing Notes on chip component replacementMODEL IDENTIFICATION - BACK PANEL 3. DISASSEMBLY TABLE OF CONTENTS6. DIAGRAMS Ver 1.1CLEANING THE OPTICAL PICKUP CD PLAYER DRAWING OUT THE TRAY DURING POWER OFFSECTION SERVICING NOTE REMOVING THE INDICATION PLATE FLSERVICE POSITION THE CD MECHANISM SERVICE POSITION THE MD MECHANISMSERVICE POSITION THE POWER BOARD Power boardProcedure 1: recommended Cold ResetProcedure Hot ResetWhen no errors occur When errors occurError History Display Mode Aging Mode•Reading the BD Error History Display • Reading the Mechanism Error History DisplayJIG FOR CHECKING BD MD BOARD WAVEFORM Display Precedure Record PrecedureFORCED RESET CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTSMAIN BOARD Component Side ProcedurePrecedure RETRY CAUSE DISPLAY MODEReading the Display ExampleHexadecimal nBinary Conversion Table Reading the DisplayLOCATION OF PARTS AND CONTROLS SECTION GENERALFront Panel Page Page 3-1.CASE SECTION DISASSEMBLY3-3.BACK PANEL 3-2.FRONT PANEL3-5.CD MECHANISM DECK 3-4.MAIN BOARD AND POWER TRANSFORMER3-7.CD BASE UNIT 3-6.TRAY, GEAR AND CAM3-8.OPTICAL PICK-UPSECTION OF CD KSS-213BA/F-NP 3-10.MD MECHANISM DECK • Note for installation of Slider CAM 3-14.OPTICAL PICK-UPOF MD KMS-260B/J1N 3-13.OVER WRITE HEAD3-15.SPINDLE MOTOR M901 AND SLED MOTOR M902 MD 4-2.SETTING THE TEST MODE 4-1.PRECAUTIONS FOR USE OF TEST MODEProcedure 1: Press the Procedure 2: Press the4-5.SELECTING THE TEST MODE 4-5-3. Non-VolatileMemory Mode EEP MODE 4-5-1.Operating the Continuous Playback Mode4-6.FUNCTIONS OF OTHER BUTTONS 2. Error rate display4-7.TEST MODE DISPLAYS 1. Mode displayContents MEANINGS OF OTHER DISPLAYSWhen Lit When OffMD SECTION 5-1.PARTS REPLACEMENT AND ADJUSTMENT SECTION ELECTRICAL ADJUSTMENTS5-5.CREATING CONTINUOUSLY RECORDED DISC 5-4.PRECAUTIONS FOR ADJUSTMENTSOptical pick-upflexible board Checking Procedure 5-6-1.Temperature Compensation Offset Check5-6-2.Laser Power Check Connection Checking ProcedureCD Error Rate Check 5-6-5.C PLAY Checking MO Error Rate Check5-6-4.Focus Bias Check 5-6-6. Self-Recording/playbackCheck5-9.TEMPERATURE COMPENSATION OFFSET ADJUTMENT 5-7.INITIAL SETTING OF ADJUSTMENT VALUE5-10.LASER POWER ADJUSTMENT Setting ProcedureAdjusting Procedure 5-11.TRAVERSE ADJUSTMENTSpecified Value ConnectionAdjusting Procedure 5-12.FOCUS BIAS ADJUSTMENT5-15.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT 5-13.ERROR RATE CHECK5-13-1.CD Error Rate Check 5-13-2.MO Error Rate CheckCD SECTION 5-15.ADJUSTING POINTS AND CONNECTING POINTSBD MD BOARD SIDE A BD MD BOARD SIDE B4040 HCD-MD373 SECTION DIAGRAMS6-1.CIRCUIT BOARDS LOCATION TUNER UNIT is supplied as the assembled block•SIGNAL PATH CD 6-2.BLOCK DIAGRAMS – BD CD SECTION –HCD-MD373 Page– BD MD SECTION 1/2 – 4242R-chis omitted Siganl pathPage – BD MD SECTION 2/2 –HCD-MD373 Page– MAIN SECTION – 4444HCD-MD373 PageFor printed wiring boards For schematic diagramsWAVEFORMS – BD CD SECTION – – BD MD 1/2 SECTION –• See page 40 for Circuit Boards Location 6-3.PRINTED WIRING BOARD – BD CD SECTION –HCD-MD373 Page•See page 67 for IC Block Diagrams 6-4.SCHEMATIC DIAGRAM – BD CD SECTION –See page 45 for Waveforms •See page 69 for IC Pin Functions•Semiconductor Location 6-5.PRINTED WIRING BOARD - BD MD SECTIONHCD-MD373 Page•See page 65 for IC Block Diagrams 6-6.SCHEMATIC DIAGRAM – BD MD SECTION 1/2 –•See page 71 for IC Pin Functions HCD-MD373•See page 48 for Printed Wiring Board 6-7.SCHEMATIC DIAGRAM - BD MD SECTION 2/2•See page 66 for IC Block Diagrams HCD-MD3736-9.PRINTED WIRING BOARD – SP SECTION – 6-8.SCHEMATIC DIAGRAM - SP SECTIONPage Page•See page 40 for Circuit Boards Location 6-10.PRINTED WIRING BOARD – MAIN SECTION –HCD-MD373 Page• See page 68 for IC Block Diagrams 6-11.SCHEMATIC DIAGRAM – MAIN SECTION 1/3 –HCD-MD373 Page•See page 52 for Printed Wiring Board 6-12.SCHEMATIC DIAGRAM – MAIN SECTION 2/3 –•See page 68 for IC Block Diagrams HCD-MD373Page Page 6-13.SCHEMATIC DIAGRAM - MAIN SECTION 3/3See page 75 for IC Pin Functions See page 52 for Printed Wiring Board•See page 67 for IC Block Diagrams 6-14.SCHEMATIC DIAGRAM – MD DIGITAL SECTION –HCD-MD373 PagePage Page Page Page 6-15.PRINTED WIRING BOARD – MD DIGITAL SECTION –HCD-MD373 • See page 40 for Circuit Boards LocationHCD-MD373 6-16.SCHEMATIC DIAGRAM – AMP SECTION –Page PageHCD-MD373 6-17.PRINTED WIRING BOARD – AMP SECTION –Page Page See page 40 for Circuit Boards LocationHCD-MD373 6-18.SCHEMATIC DIAGRAM - PANEL SECTIONPage • Semiconductor Location 6-19.PRINTED WIRING BOARD – PANEL SECTION –HCD-MD373 PageHCD-MD373 6-20.SCHEMATIC DIAGRAM – POWER SECTION –Page Page HCD-MD373 6-21.PRINTED WIRING BOARD – POWER SECTION –Page Page6-23.PRINTED WIRING BOARD – BD SWITCH SECTION – 6-22.SCHEMATIC DIAGRAM – BD SWITCH SECTION –6-24.SCHEMATIC DIAGRAM – LOADING SECTION – 6-25.PRINTED WIRING BOARD – LOADING SECTION –• BD MD Board 1/2 6-26.IC BLOCK DIAGRAMSIC101 CXA2523AR • BD MD Board 2/2 IC152 BH6511FS-E2IC121 CXD2654R IC101 CXD2587Q • BD CD BoardC103 CXA2568M-T6 • MD DIGITAL BoardIC171 LB1641 • MAIN Board 3/3• MAIN Board 1/3 IC302 MC14052B6-27.IC PIN FUNCTIONS Tracking error signal input • IC101 RF Amplifier CXA2523AR BDMD board MNT0 FOK Data input/output for DRAM TFDR IC501 MASTER CONTROL M30620ECFP-A21MAIN board STEREO 7-1.CASE AND FRONT PANEL SECTION 11 20 SECTION EXPLODED VIEWS17 16 59 #3 7-2.CHASSIS SECTION 5261 54 124 113 111112 117 118 114 7-3.MD MECHANISM DECK MDM-5A 113 110 107120 122 123 103 102 101163 170166 7-4.MD BASE UNIT MBU-5A 152 164162 161 157 152 152201 204 203 7-5.CD MECHANISM DECK CDM55A-5SBD32214 215 217 214 Ver255 256 7-6.CDBASE UNIT BU-5SBD32253 258 251315 317 7-7.CD MECHANISM DECK CDM55C-5BD32314 314 Ver 1.1BU identification: metal turntable without magnet 7-8.CDBASE UNIT BU-5BD32355 356 353 354SECTION ELECTRICAL PARTS LIST BD CD BD CD BD MDBD MD MD DIGITALMD DIGITAL LOADING MAIN MAIN Ref. No MAINPart No MAINPANEL PANEL POWERPOWER Ver HCD-MD373Ref. No HCD-MD373 MEMOBU-5BD32 HCD-MD373 REVISION HISTORY1999.08 Date