Manuals / Sony / Home Audio / Stereo System

Sony HCD-MD373 service manual Section Disassembly, Case

Models: HCD-MD373

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Page 19

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SECTION 3

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

Case		Front panel		Back panel
(Page 19)		(Page 20)		(Page 20)

CD base unit section (Page 22)

MD mechanism deck (Page 23)

Note: Follow the disassembly procedure in the numerical order given.

3-1. CASE

1Two screws (Case 3 TP2)

Main board and Power transformer (Page 21)

Optical pick-up (CD) (Page 22)

BD (CD) board Sled motor (M102) Spindle motor (M101) (Page 23)

Tray, Gear and Cam section (Page 22)

MD base unit		Over write head section
MD base unit		Over write head section
BD (MD) board		Optical pick-up (MD)
(Page 24)		(Page 25)

Slider (CAM)		Sled motor (M902)
(Page 24)		Spindle motor (M901)
		(Page 25)

3Case

2Two screws (Case 3 TP2)

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Sony HCD-MD373 service manual Section Disassembly, Case

Contents

SERVICE MANUAL SPECIFICATIONSSony Corporation 9-928-998-12SELF-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 Ver 1.1 TABLE OF CONTENTS3. DISASSEMBLY 6. DIAGRAMSREMOVING THE INDICATION PLATE FL DRAWING OUT THE TRAY DURING POWER OFFCLEANING THE OPTICAL PICKUP CD PLAYER SECTION SERVICING NOTEPower board SERVICE POSITION THE MD MECHANISMSERVICE POSITION THE CD MECHANISM SERVICE POSITION THE POWER BOARDHot Reset Cold ResetProcedure 1: recommended ProcedureAging Mode When errors occurWhen no errors occur Error History Display Mode•Reading the BD Error History Display • Reading the Mechanism Error History DisplayJIG FOR CHECKING BD MD BOARD WAVEFORM Display Precedure Record PrecedureProcedure CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTSFORCED RESET MAIN BOARD Component SideExample RETRY CAUSE DISPLAY MODEPrecedure Reading the DisplayHexadecimal 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 Procedure 2: Press the 4-1.PRECAUTIONS FOR USE OF TEST MODE4-2.SETTING THE TEST MODE Procedure 1: Press the4-5.SELECTING THE TEST MODE 4-5-3. Non-VolatileMemory Mode EEP MODE 4-5-1.Operating the Continuous Playback Mode1. Mode display 2. Error rate display4-6.FUNCTIONS OF OTHER BUTTONS 4-7.TEST MODE DISPLAYSWhen Off MEANINGS OF OTHER DISPLAYSContents When LitMD SECTION 5-1.PARTS REPLACEMENT AND ADJUSTMENT SECTION ELECTRICAL ADJUSTMENTS5-5.CREATING CONTINUOUSLY RECORDED DISC 5-4.PRECAUTIONS FOR ADJUSTMENTSOptical pick-upflexible board Connection Checking Procedure 5-6-1.Temperature Compensation Offset CheckChecking Procedure 5-6-2.Laser Power Check5-6-6. Self-Recording/playbackCheck 5-6-5.C PLAY Checking MO Error Rate CheckCD Error Rate Check 5-6-4.Focus Bias CheckSetting Procedure 5-7.INITIAL SETTING OF ADJUSTMENT VALUE5-9.TEMPERATURE COMPENSATION OFFSET ADJUTMENT 5-10.LASER POWER ADJUSTMENTConnection 5-11.TRAVERSE ADJUSTMENTAdjusting Procedure Specified ValueAdjusting Procedure 5-12.FOCUS BIAS ADJUSTMENT5-13-2.MO Error Rate Check 5-13.ERROR RATE CHECK5-15.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT 5-13-1.CD Error Rate CheckBD MD BOARD SIDE B 5-15.ADJUSTING POINTS AND CONNECTING POINTSCD SECTION BD MD BOARD SIDE ATUNER UNIT is supplied as the assembled block HCD-MD373 SECTION DIAGRAMS4040 6-1.CIRCUIT BOARDS LOCATIONPage 6-2.BLOCK DIAGRAMS – BD CD SECTION –•SIGNAL PATH CD HCD-MD373Siganl path 4242– BD MD SECTION 1/2 – R-chis omittedPage – BD MD SECTION 2/2 –Page HCD-MD373Page 4444– MAIN SECTION – HCD-MD373– BD MD 1/2 SECTION – For schematic diagramsFor printed wiring boards WAVEFORMS – BD CD SECTION –Page 6-3.PRINTED WIRING BOARD – BD CD SECTION –• See page 40 for Circuit Boards Location HCD-MD373•See page 69 for IC Pin Functions 6-4.SCHEMATIC DIAGRAM – BD CD SECTION –•See page 67 for IC Block Diagrams See page 45 for WaveformsPage 6-5.PRINTED WIRING BOARD - BD MD SECTION•Semiconductor Location HCD-MD373HCD-MD373 6-6.SCHEMATIC DIAGRAM – BD MD SECTION 1/2 –•See page 65 for IC Block Diagrams •See page 71 for IC Pin FunctionsHCD-MD373 6-7.SCHEMATIC DIAGRAM - BD MD SECTION 2/2•See page 48 for Printed Wiring Board •See page 66 for IC Block DiagramsPage 6-8.SCHEMATIC DIAGRAM - SP SECTION6-9.PRINTED WIRING BOARD – SP SECTION – PagePage 6-10.PRINTED WIRING BOARD – MAIN SECTION –•See page 40 for Circuit Boards Location HCD-MD373Page 6-11.SCHEMATIC DIAGRAM – MAIN SECTION 1/3 –• See page 68 for IC Block Diagrams HCD-MD373HCD-MD373 6-12.SCHEMATIC DIAGRAM – MAIN SECTION 2/3 –•See page 52 for Printed Wiring Board •See page 68 for IC Block DiagramsSee page 52 for Printed Wiring Board 6-13.SCHEMATIC DIAGRAM - MAIN SECTION 3/3Page Page See page 75 for IC Pin FunctionsPage 6-14.SCHEMATIC DIAGRAM – MD DIGITAL SECTION –•See page 67 for IC Block Diagrams HCD-MD373• See page 40 for Circuit Boards Location 6-15.PRINTED WIRING BOARD – MD DIGITAL SECTION –Page Page Page Page HCD-MD373Page 6-16.SCHEMATIC DIAGRAM – AMP SECTION –HCD-MD373 PageSee page 40 for Circuit Boards Location 6-17.PRINTED WIRING BOARD – AMP SECTION –HCD-MD373 Page PageHCD-MD373 6-18.SCHEMATIC DIAGRAM - PANEL SECTIONPage Page 6-19.PRINTED WIRING BOARD – PANEL SECTION –• Semiconductor Location HCD-MD373HCD-MD373 6-20.SCHEMATIC DIAGRAM – POWER SECTION –Page Page Page 6-21.PRINTED WIRING BOARD – POWER SECTION –HCD-MD373 Page6-25.PRINTED WIRING BOARD – LOADING SECTION – 6-22.SCHEMATIC DIAGRAM – BD SWITCH SECTION –6-23.PRINTED WIRING BOARD – BD SWITCH SECTION – 6-24.SCHEMATIC DIAGRAM – LOADING SECTION –• BD MD Board 1/2 6-26.IC BLOCK DIAGRAMSIC101 CXA2523AR • BD MD Board 2/2 IC152 BH6511FS-E2IC121 CXD2654R • MD DIGITAL Board • BD CD BoardIC101 CXD2587Q C103 CXA2568M-T6IC302 MC14052B • MAIN Board 3/3IC171 LB1641 • MAIN Board 1/36-27.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 54 103 102 101 7-3.MD MECHANISM DECK MDM-5A 113 110 107124 113 111112 117 118 114 120 122 123157 152 152 7-4.MD BASE UNIT MBU-5A 152 164163 170166 162 161Ver 7-5.CD MECHANISM DECK CDM55A-5SBD32201 204 203 214 215 217 214258 251 7-6.CDBASE UNIT BU-5SBD32255 256 253Ver 1.1 7-7.CD MECHANISM DECK CDM55C-5BD32315 317 314 314353 354 7-8.CDBASE UNIT BU-5BD32BU identification: metal turntable without magnet 355 356SECTION 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 MEMODate HCD-MD373 REVISION HISTORYBU-5BD32 1999.08