Manuals / Sony / Home Audio / Stereo System

Sony HCD-MD373 Section Servicing Note, Drawing Out The Tray During Power Off, Note 1: “R”

Models: HCD-MD373

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SECTION 1

SERVICING NOTE

Note 1: “R”

As this unit has only a few buttons, some operations require the use of remote commander (provided with RM-SJ373/unit: 1-418-554-11) buttons. These operations are indicated as “R” in this manual.

Example: MENU/NO “R” ...Press the MENU/NO button of the remote commander.

DRAWING OUT THE TRAY DURING POWER OFF

Tray (CDM)

Move the Cam block in the direction of arrow with a finger.

REMOVING THE INDICATION PLATE (FL)

Note: Follow the disassembly procedure in the numerical order given.	4 Panel board	3 Six screws
		(BVTP 3x10)

• Press the of the front panel from the rear and remove the 7 indication plate (FL).

7 Indication plate (FL)

2Nut

6Filter (FL)

1 Knob (VOL)

5 Ring (VOL)

(Remove the two claws from the Front panel back side.)

CLEANING THE OPTICAL PICKUP (CD PLAYER)

CD mechanism deck	Floating screw

Optical pick-up block

Clean the lens block with applicator.

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Sony HCD-MD373 Section Servicing Note, Drawing Out The Tray During Power Off, Removing The Indication Plate Fl

Contents

9-928-998-12 SPECIFICATIONSSony Corporation 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 6. DIAGRAMS TABLE OF CONTENTS3. DISASSEMBLY Ver 1.1SECTION SERVICING NOTE DRAWING OUT THE TRAY DURING POWER OFFCLEANING THE OPTICAL PICKUP CD PLAYER REMOVING THE INDICATION PLATE FLSERVICE POSITION THE POWER BOARD SERVICE POSITION THE MD MECHANISMSERVICE POSITION THE CD MECHANISM Power boardProcedure Cold ResetProcedure 1: recommended Hot ResetError History Display Mode When errors occurWhen no errors occur Aging Mode• Reading the Mechanism Error History Display •Reading the BD Error History DisplayJIG FOR CHECKING BD MD BOARD WAVEFORM Record Precedure Display PrecedureMAIN BOARD Component Side CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTSFORCED RESET ProcedureReading the Display RETRY CAUSE DISPLAY MODEPrecedure 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 Procedure 1: Press the 4-1.PRECAUTIONS FOR USE OF TEST MODE4-2.SETTING THE TEST MODE Procedure 2: Press the4-5.SELECTING THE TEST MODE 4-5-1.Operating the Continuous Playback Mode 4-5-3. Non-VolatileMemory Mode EEP MODE4-7.TEST MODE DISPLAYS 2. Error rate display4-6.FUNCTIONS OF OTHER BUTTONS 1. Mode displayWhen Lit MEANINGS OF OTHER DISPLAYSContents 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 5-6-2.Laser Power Check 5-6-1.Temperature Compensation Offset CheckChecking Procedure Connection Checking Procedure5-6-4.Focus Bias Check 5-6-5.C PLAY Checking MO Error Rate CheckCD Error Rate Check 5-6-6. Self-Recording/playbackCheck5-10.LASER POWER ADJUSTMENT 5-7.INITIAL SETTING OF ADJUSTMENT VALUE5-9.TEMPERATURE COMPENSATION OFFSET ADJUTMENT Setting ProcedureSpecified Value 5-11.TRAVERSE ADJUSTMENTAdjusting Procedure Connection5-12.FOCUS BIAS ADJUSTMENT Adjusting Procedure5-13-1.CD Error Rate Check 5-13.ERROR RATE CHECK5-15.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT 5-13-2.MO Error Rate CheckBD MD BOARD SIDE A 5-15.ADJUSTING POINTS AND CONNECTING POINTSCD SECTION BD MD BOARD SIDE B6-1.CIRCUIT BOARDS LOCATION HCD-MD373 SECTION DIAGRAMS4040 TUNER UNIT is supplied as the assembled blockHCD-MD373 6-2.BLOCK DIAGRAMS – BD CD SECTION –•SIGNAL PATH CD PageR-chis omitted 4242– BD MD SECTION 1/2 – Siganl pathHCD-MD373 – BD MD SECTION 2/2 –Page PageHCD-MD373 4444– MAIN SECTION – PageWAVEFORMS – BD CD SECTION – For schematic diagramsFor printed wiring boards – BD MD 1/2 SECTION –HCD-MD373 6-3.PRINTED WIRING BOARD – BD CD SECTION –• See page 40 for Circuit Boards Location PageSee page 45 for Waveforms 6-4.SCHEMATIC DIAGRAM – BD CD SECTION –•See page 67 for IC Block Diagrams •See page 69 for IC Pin FunctionsHCD-MD373 6-5.PRINTED WIRING BOARD - BD MD SECTION•Semiconductor Location Page•See page 71 for IC Pin Functions 6-6.SCHEMATIC DIAGRAM – BD MD SECTION 1/2 –•See page 65 for IC Block Diagrams HCD-MD373•See page 66 for IC Block Diagrams 6-7.SCHEMATIC DIAGRAM - BD MD SECTION 2/2•See page 48 for Printed Wiring Board HCD-MD373Page 6-8.SCHEMATIC DIAGRAM - SP SECTION6-9.PRINTED WIRING BOARD – SP SECTION – PageHCD-MD373 6-10.PRINTED WIRING BOARD – MAIN SECTION –•See page 40 for Circuit Boards Location PageHCD-MD373 6-11.SCHEMATIC DIAGRAM – MAIN SECTION 1/3 –• See page 68 for IC Block Diagrams Page•See page 68 for IC Block Diagrams 6-12.SCHEMATIC DIAGRAM – MAIN SECTION 2/3 –•See page 52 for Printed Wiring Board HCD-MD373See page 75 for IC Pin Functions 6-13.SCHEMATIC DIAGRAM - MAIN SECTION 3/3Page Page See page 52 for Printed Wiring BoardHCD-MD373 6-14.SCHEMATIC DIAGRAM – MD DIGITAL SECTION –•See page 67 for IC Block Diagrams PageHCD-MD373 6-15.PRINTED WIRING BOARD – MD DIGITAL SECTION –Page Page Page Page • See page 40 for Circuit Boards LocationPage 6-16.SCHEMATIC DIAGRAM – AMP SECTION –HCD-MD373 PagePage Page 6-17.PRINTED WIRING BOARD – AMP SECTION –HCD-MD373 See page 40 for Circuit Boards Location6-18.SCHEMATIC DIAGRAM - PANEL SECTION HCD-MD373Page HCD-MD373 6-19.PRINTED WIRING BOARD – PANEL SECTION –• Semiconductor Location Page6-20.SCHEMATIC DIAGRAM – POWER SECTION – HCD-MD373Page Page Page 6-21.PRINTED WIRING BOARD – POWER SECTION –HCD-MD373 Page6-24.SCHEMATIC DIAGRAM – LOADING SECTION – 6-22.SCHEMATIC DIAGRAM – BD SWITCH SECTION –6-23.PRINTED WIRING BOARD – BD SWITCH 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 C103 CXA2568M-T6 • BD CD BoardIC101 CXD2587Q • MD DIGITAL Board• MAIN Board 1/3 • MAIN Board 3/3IC171 LB1641 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 54 120 122 123 7-3.MD MECHANISM DECK MDM-5A 113 110 107124 113 111112 117 118 114 103 102 101162 161 7-4.MD BASE UNIT MBU-5A 152 164163 170166 157 152 152214 215 217 214 7-5.CD MECHANISM DECK CDM55A-5SBD32201 204 203 Ver253 7-6.CDBASE UNIT BU-5SBD32255 256 258 251314 314 7-7.CD MECHANISM DECK CDM55C-5BD32315 317 Ver 1.1355 356 7-8.CDBASE UNIT BU-5BD32BU identification: metal turntable without magnet 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-MD3731999.08 HCD-MD373 REVISION HISTORYBU-5BD32 Date