Sony MDS-JE640 specifications Section Electrical Adjustments, Parts Replacement and Adjustment

Page 20

SECTION 5

ELECTRICAL ADJUSTMENTS

5-1. PARTS REPLACEMENT AND ADJUSTMENT

If malfunctions caused by Optical pick-up such as sound skipping are suspected, follow the following check.

Check before replacement

Start
5-6-2.	NG
Laser Power Check
(See page 23)
OK
5-6-3.	NG
Iop Compare
(See page 23)
OK
5-6-4.	NG	Replace Optical pick-up or MDM-7A
Auto Check		Replace Optical pick-up or MDM-7A
(See page 24)

OK

Other faults are suspected.

Check the threading mechanism, etc.

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Contents Specifications InputsOutputs NEWSupplied accessories SELF-DIAGNOSIS FunctionGeneral Three- or five Digit code Cause/Remedy MessageItems of Error History Mode Items and Contents Table of Contents DisassemblyDiagrams Exploded ViewsSection Service Notes Flexible Circuit Board RepairingJIG for Checking BD Board Waveform IOPRecord Precedure Main Board Component Side Checks Prior to Parts Replacement and AdjustmentsForced Reset Retry Cause Display Mode Bit BinaryHexadecimal t Binary Conversion Table Section General Section Disassembly Front Panel SectionMain Board PT BOARD, VOL-SEL BoardMechanism Deck Section MDM-7A BD BoardSection Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test ModeSelecting the Test Mode Display Details Mark GroupOperating the Continuous Playback Mode MENU/NOTest Mode Displays Mode displayError rate display Functions of Other ButtonsWhen Memory NG is Displayed Meanings of Other DisplaysAutomatic SELF-DIAGNOSIS Function InformationCheck before replacement Section Electrical AdjustmentsParts Replacement and Adjustment Adjustment flow YESPrecautions for Adjustments Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-260B Using the Continuously Recorded Disc Checks Prior to RepairsAuto Check Other ChecksPlay Check MO Error Rate Check CD Error Rate CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Traverse Adjustment Iop NV SaveFocus Bias Adjustment YESError Rate Check Auto Gain Control Output Level AdjustmentCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Section Diagrams For schematic diagramsFor printed wiring boards Circuit Boards LocationMDS-JE640 Block Diagrams BD SectionSignal Path Main Section REC AnalogDisplay Board BD BoardMain Board Printed Wiring Board BD Section SemiconductorPIN PIN Function Printed Wiring Board Main Section Side a IC2 Printed Wiring Board Main Section Side BIC1 PIN MDS-JE640 Schematic Diagram Main /3 See page 47 for IC Block Diagrams Printed Wiring Board Power Section Printed Wiring Board Display Section Schematic Diagram Display Section See page 34 for Waveforms IC Block Diagrams IC101 CXA2523AR BD BoardIC400 LA5643 Main Board IC PIN Functions IC101 CXA2523AR RF Amplifier BD BoardMNT0 FOK Mvci Tfdr IC1 M30805SGP System Control Main Board HLDA/ALE Section Exploded Views Chassis SectionPanel ASSY, Front Black AEP,UK,CIS,SP,MY Panel ASSY, Front SilverMechanism MDM-7A 202 220 201 213 215 216 205 218 207HEAD, Over Light Motor ASSY, SpindleMotor ASSY, Sled Motor ASSY, LoadingSection Electrical Parts List IC TC7WU04FUTE12R Metal ChipIC MC74ACT08DTR2 IC BA033FP-E2Display KEY-SW Main PIN, Connector 3P CONNECTOR, FFC 17PPIN, Connector 4P PLUG, Connector 10P DiodeIC SN74LVU04ANSR AEP,UK,CISTransistor UN2211-TX Transistor UN2111-TXConnector TRANSFORMER, Power CNDTRANSFORMER, Power SP,MY Composition Circuit BlockVOL-SEL Sony Corporation