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Sony HCD-MD373 service manual Ver, Ref. No

Models: HCD-MD373

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HCD-MD373

Ver 1.1 2001.06

Ref. No.	Part No.	Description	Remark
		*************
		HARDWARE LIST
		*************
#1	7-685-647-79 SCREW +BVTP 3X10 TYPE2 TT(B)
#2	7-685-650-91 SCREW +BVTP 3X16 TYPE2 TT(B)
#3	7-685-871-01 SCREW +BVTT 3X6 (S)
#4	7-685-533-19 SCREW +BTP 2.6X6 TYPE2 N-S
#5	7-627-852-08	SCREW,PRECISION +P 1.7X2.5
#6	7-621-772-40	SCREW +B 2X8
#7	7-621-772-20	SCREW +B 2X5
#8	7-685-133-19 SCREW (DIA. 2.6) (IT3B)
#9	7-621-772-10	SCREW +B 2X4
#10	7-621-772-30	SCREW +B 2X6
#11	7-685-534-19 SCREW +BTP 2.6X8 TYPE2 N-S

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Sony HCD-MD373 service manual Ver, Ref. No

Contents

SPECIFICATIONS Sony Corporation9-928-998-12 SERVICE MANUALSELF-DIAGNOSISFUNCTION ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS Table of Error CodesSelecting the Test Mode Notes on chip component replacement Flexible Circuit Board RepairingMODEL IDENTIFICATION - BACK PANEL TABLE OF CONTENTS 3. DISASSEMBLY6. DIAGRAMS Ver 1.1DRAWING OUT THE TRAY DURING POWER OFF CLEANING THE OPTICAL PICKUP CD PLAYERSECTION SERVICING NOTE REMOVING THE INDICATION PLATE FLSERVICE POSITION THE MD MECHANISM SERVICE POSITION THE CD MECHANISMSERVICE POSITION THE POWER BOARD Power boardCold Reset Procedure 1: recommendedProcedure Hot ResetWhen errors occur When no errors occurError History Display Mode Aging Mode• Reading the Mechanism Error History Display •Reading the BD Error History DisplayJIG FOR CHECKING BD MD BOARD WAVEFORM Record Precedure Display PrecedureCHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS FORCED RESETMAIN BOARD Component Side ProcedureRETRY CAUSE DISPLAY MODE PrecedureReading the Display ExampleReading the Display Hexadecimal nBinary Conversion TableSECTION GENERAL LOCATION OF PARTS AND CONTROLSFront Panel Page Page SECTION DISASSEMBLY 3-1.CASE3-2.FRONT PANEL 3-3.BACK PANEL3-4.MAIN BOARD AND POWER TRANSFORMER 3-5.CD MECHANISM DECK3-6.TRAY, GEAR AND CAM 3-7.CD BASE UNIT3-8.OPTICAL PICK-UPSECTION OF CD KSS-213BA/F-NP 3-10.MD MECHANISM DECK • Note for installation of Slider CAM 3-13.OVER WRITE HEAD 3-14.OPTICAL PICK-UPOF MD KMS-260B/J1N3-15.SPINDLE MOTOR M901 AND SLED MOTOR M902 MD 4-1.PRECAUTIONS FOR USE OF TEST MODE 4-2.SETTING THE TEST MODEProcedure 1: Press the Procedure 2: Press the4-5.SELECTING THE TEST MODE 4-5-1.Operating the Continuous Playback Mode 4-5-3. Non-VolatileMemory Mode EEP MODE2. Error rate display 4-6.FUNCTIONS OF OTHER BUTTONS4-7.TEST MODE DISPLAYS 1. Mode displayMEANINGS OF OTHER DISPLAYS ContentsWhen Lit When OffSECTION ELECTRICAL ADJUSTMENTS MD SECTION 5-1.PARTS REPLACEMENT AND ADJUSTMENT5-4.PRECAUTIONS FOR ADJUSTMENTS 5-5.CREATING CONTINUOUSLY RECORDED DISCOptical pick-upflexible board 5-6-1.Temperature Compensation Offset Check Checking Procedure5-6-2.Laser Power Check Connection Checking Procedure5-6-5.C PLAY Checking MO Error Rate Check CD Error Rate Check5-6-4.Focus Bias Check 5-6-6. Self-Recording/playbackCheck5-7.INITIAL SETTING OF ADJUSTMENT VALUE 5-9.TEMPERATURE COMPENSATION OFFSET ADJUTMENT5-10.LASER POWER ADJUSTMENT Setting Procedure5-11.TRAVERSE ADJUSTMENT Adjusting ProcedureSpecified Value Connection5-12.FOCUS BIAS ADJUSTMENT Adjusting Procedure5-13.ERROR RATE CHECK 5-15.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT5-13-1.CD Error Rate Check 5-13-2.MO Error Rate Check5-15.ADJUSTING POINTS AND CONNECTING POINTS CD SECTIONBD MD BOARD SIDE A BD MD BOARD SIDE BHCD-MD373 SECTION DIAGRAMS 40406-1.CIRCUIT BOARDS LOCATION TUNER UNIT is supplied as the assembled block6-2.BLOCK DIAGRAMS – BD CD SECTION – •SIGNAL PATH CDHCD-MD373 Page4242 – BD MD SECTION 1/2 –R-chis omitted Siganl path– BD MD SECTION 2/2 – PageHCD-MD373 Page4444 – MAIN SECTION –HCD-MD373 PageFor schematic diagrams For printed wiring boardsWAVEFORMS – BD CD SECTION – – BD MD 1/2 SECTION –6-3.PRINTED WIRING BOARD – BD CD SECTION – • See page 40 for Circuit Boards LocationHCD-MD373 Page6-4.SCHEMATIC DIAGRAM – BD CD SECTION – •See page 67 for IC Block DiagramsSee page 45 for Waveforms •See page 69 for IC Pin Functions6-5.PRINTED WIRING BOARD - BD MD SECTION •Semiconductor LocationHCD-MD373 Page6-6.SCHEMATIC DIAGRAM – BD MD SECTION 1/2 – •See page 65 for IC Block Diagrams•See page 71 for IC Pin Functions HCD-MD3736-7.SCHEMATIC DIAGRAM - BD MD SECTION 2/2 •See page 48 for Printed Wiring Board•See page 66 for IC Block Diagrams HCD-MD3736-8.SCHEMATIC DIAGRAM - SP SECTION 6-9.PRINTED WIRING BOARD – SP SECTION –Page Page6-10.PRINTED WIRING BOARD – MAIN SECTION – •See page 40 for Circuit Boards LocationHCD-MD373 Page6-11.SCHEMATIC DIAGRAM – MAIN SECTION 1/3 – • See page 68 for IC Block DiagramsHCD-MD373 Page6-12.SCHEMATIC DIAGRAM – MAIN SECTION 2/3 – •See page 52 for Printed Wiring Board•See page 68 for IC Block Diagrams HCD-MD3736-13.SCHEMATIC DIAGRAM - MAIN SECTION 3/3 Page PageSee page 75 for IC Pin Functions See page 52 for Printed Wiring Board6-14.SCHEMATIC DIAGRAM – MD DIGITAL SECTION – •See page 67 for IC Block DiagramsHCD-MD373 Page6-15.PRINTED WIRING BOARD – MD DIGITAL SECTION – Page Page Page PageHCD-MD373 • See page 40 for Circuit Boards Location6-16.SCHEMATIC DIAGRAM – AMP SECTION – HCD-MD373Page Page6-17.PRINTED WIRING BOARD – AMP SECTION – HCD-MD373Page Page See page 40 for Circuit Boards Location6-18.SCHEMATIC DIAGRAM - PANEL SECTION HCD-MD373Page 6-19.PRINTED WIRING BOARD – PANEL SECTION – • Semiconductor LocationHCD-MD373 Page6-20.SCHEMATIC DIAGRAM – POWER SECTION – HCD-MD373Page Page 6-21.PRINTED WIRING BOARD – POWER SECTION – HCD-MD373Page Page6-22.SCHEMATIC DIAGRAM – BD SWITCH SECTION – 6-23.PRINTED WIRING BOARD – BD SWITCH SECTION –6-24.SCHEMATIC DIAGRAM – LOADING SECTION – 6-25.PRINTED WIRING BOARD – LOADING SECTION –6-26.IC BLOCK DIAGRAMS • BD MD Board 1/2IC101 CXA2523AR IC152 BH6511FS-E2 • BD MD Board 2/2IC121 CXD2654R • BD CD Board IC101 CXD2587QC103 CXA2568M-T6 • MD DIGITAL Board• MAIN Board 3/3 IC171 LB1641• 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 SECTION EXPLODED VIEWS 7-1.CASE AND FRONT PANEL SECTION 11 2017 16 7-2.CHASSIS SECTION 52 59 #361 54 7-3.MD MECHANISM DECK MDM-5A 113 110 107 124 113 111112 117 118 114120 122 123 103 102 1017-4.MD BASE UNIT MBU-5A 152 164 163 170166162 161 157 152 1527-5.CD MECHANISM DECK CDM55A-5SBD32 201 204 203214 215 217 214 Ver7-6.CDBASE UNIT BU-5SBD32 255 256253 258 2517-7.CD MECHANISM DECK CDM55C-5BD32 315 317314 314 Ver 1.17-8.CDBASE UNIT BU-5BD32 BU identification: metal turntable without magnet355 356 353 354SECTION ELECTRICAL PARTS LIST BD CD BD MD BD CDMD DIGITAL BD MDMD DIGITAL LOADING MAIN MAIN MAIN Ref. NoMAIN Part NoPANEL POWER PANELPOWER HCD-MD373 VerRef. No MEMO HCD-MD373HCD-MD373 REVISION HISTORY BU-5BD321999.08 Date