Section Electrical Adjustments | Sony MDS-JE640 manual

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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Image 20

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

Contents

Specifications InputsOutputs NEW Supplied accessories SELF-DIAGNOSIS FunctionGeneral Three- or five Digit code Cause/Remedy Message Items of Error History Mode Items and Contents Table of Contents DisassemblyDiagrams Exploded Views Section Service Notes Flexible Circuit Board Repairing JIG for Checking BD Board Waveform IOP Record Precedure Main Board Component Side Checks Prior to Parts Replacement and AdjustmentsForced Reset Retry Cause Display Mode Bit Binary Hexadecimal t Binary Conversion Table Section General Section Disassembly Front Panel Section Main Board PT BOARD, VOL-SEL Board Mechanism Deck Section MDM-7A BD Board Section Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test Mode Selecting the Test Mode Display Details Mark Group Operating the Continuous Playback Mode MENU/NO Test Mode Displays Mode displayError rate display Functions of Other Buttons When Memory NG is Displayed Meanings of Other DisplaysAutomatic SELF-DIAGNOSIS Function Information Check before replacement Section Electrical AdjustmentsParts Replacement and Adjustment Adjustment flow YES Precautions for Adjustments Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-260B Using the Continuously Recorded Disc Checks Prior to Repairs Auto Check Other Checks Play Check MO Error Rate Check CD Error Rate Check Laser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Traverse Adjustment Iop NV Save Focus Bias Adjustment YES Error Rate Check Auto Gain Control Output Level AdjustmentCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level Adjustment Adjusting Points and Connecting Points Section Diagrams For schematic diagramsFor printed wiring boards Circuit Boards Location MDS-JE640 Block Diagrams BD SectionSignal Path Main Section REC Analog Display Board BD BoardMain Board Printed Wiring Board BD Section Semiconductor PIN 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 Board IC400 LA5643 Main Board IC PIN Functions IC101 CXA2523AR RF Amplifier BD Board MNT0 FOK Mvci Tfdr IC1 M30805SGP System Control Main Board HLDA/ALE Section Exploded Views Chassis Section Panel ASSY, Front Black AEP,UK,CIS,SP,MY Panel ASSY, Front Silver Mechanism MDM-7A 202 220 201 213 215 216 205 218 207 HEAD, Over Light Motor ASSY, SpindleMotor ASSY, Sled Motor ASSY, Loading Section Electrical Parts List IC TC7WU04FUTE12R Metal ChipIC MC74ACT08DTR2 IC BA033FP-E2 Display KEY-SW Main PIN, Connector 3P CONNECTOR, FFC 17PPIN, Connector 4P PLUG, Connector 10P Diode IC SN74LVU04ANSR AEP,UK,CISTransistor UN2211-TX Transistor UN2111-TX Connector TRANSFORMER, Power CNDTRANSFORMER, Power SP,MY Composition Circuit Block VOL-SEL Sony Corporation