Sony UK model 4-216-349-3 Australian model 4-216-349-4, Singapore model Forced Reset, Rec/Play

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CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”.

 

Criteria for Determination

Measure if unsatisfactory:

 

(Unsatisfactory if specified value is not satisfied)

 

 

 

 

 

Laser power check

• 0.9 mW power

• Clean the optical pick-up

(5-6-2 : See page 21)

Specified value : 0.84 to 0.92 mW

• Adjust again

 

• 7.0 mW power

• Replace the optical pick-up

 

Specified value : 6.8 to 7.2 mW

 

 

 

 

 

lop (at 7mW)

• Replace the optical pick-up

 

• Labeled on the optical pickup

 

 

Iop value ± 10mA

 

 

 

 

Traverse check

• Traverse waveform

• Replace the optical pick-up

(5-6-3 : See page 21)

Specified value : Below 10% offset

 

Focus bias check

• Error rate check

• Replace the optical pick-up

(5-6-4 : See page 22)

Specified value : For points a, b, and c

 

 

C1 error : Below 220

 

 

AD error : Below 2

 

C PLAY check

• Error rate check

• Replace the optical pick-up

(5-6-5 : See page 22)

Specified value:

 

 

a. When using test disc (MDW-74/AU-1)

 

 

C1 error : Below 80

 

 

AD error : Below 2

 

 

b.When using check disc (TDYS-1)

 

 

C1 error : Below 50

 

Self-recording/playback

• CPLAY error rate check

If always unsatisfactory:

check

Specified value:

• Replace the overwrite head

(REC/PLAY)

C1 error : Below 80

• Check for disconnection of the circuits around the

(5-6-6 : See page 22)

AD error : Below 2

overwrite head

 

 

If occasionally unsatisfactory:

 

 

• Check if the overwrite head is distorted

 

 

• Check the mechanism around the sled

TEMP check

• Unsatisfactory if displayed as T=@@ (##) [NG]”

• Check for disconnection of the circuits around D101

(Temperature

NG

(BD board)

compensation

(@@, ## are both arbitrary numbers)

• Check the signals around IC101, IC121, CN102,

offset check)

 

CN103 (BD board)

(5-6-1 : See page 21)

 

 

 

 

 

Note:

The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments.

When performing adjustments, use the specified values for adjustments.

FORCED RESET

The system microprocessor can be reset in the following procedure.

Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.

Procedure :

Remove the short-pin attached to CN406, and then attach it again.

[MAIN BOARD] (Component Side)

CN406

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Contents Specifications MDS-JE330SELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Flexible Circuit Board Repairing VarnigTable of Contents DisassemblyDiagrams Exploded ViewsSection Servicing Note JIG for Checking BD Board WaveformIOP TEORecord Precedure Checks Prior to Parts Replacement and Adjustments Forced ResetCriteria for Determination Measure if unsatisfactory REC/PLAYRetry Cause Display Mode Bit BinaryHexadecimal Binary Bit When BinaryHigher Bits Lower Bits Hexa Details Front Panel Section GeneralLocation of Parts and Controls Slider CAM Section DisassemblyCase and Front Panel Base Unit MBU-5A and BD Board SW Board and Loading Motor M103Section Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test ModeSelecting the Test Mode GroupOperating the Continuous Playback Mode Non-Volatile Memory Mode EEP ModeMID OUTTest Mode Displays Functions of Other ButtonsMeanings of Other Displays Section Electrical Adjustments Parts Replacement and AdjustmentPrecautions for Checking Laser Diode Emissinon Precautions for USE of Optical PICK- UP KMS-260APrecautions for Adjustments Creating Continuously Recorded DiscTemperature Compensation Offset Check Laser Power CheckChecks Prior to Repairs Specified ValuePlay Checking MO Error Rate Check CD Error Rate CheckFocus Bias Check Self-Recording/playback CheckInitial Setting of Adjustment Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Recording and Displaying the IOP InformationTraverse Adjustment Focus Bias Adjustment Error 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 Circuit Boards LocationBlock Diagrams BD Section MDS-JE330Main Section LD-LOVOFor schematic diagrams For printed wiring boardsWaveforms Display SectionPrinted Wiring Board BD Section Semiconductor LocationSchematic Diagram BD 1/2 Section Schematic Diagram BD 2/2 Section Schematic Diagram Main 1/2 Section Schematic Diagram Main 2/2 Section Printed Wiring Board Main Section Printed Wiring Board Panel Section Schematic Diagram Panel Section BD Section IC101 Schematic Diagram BD Switch Section IC Block DiagramsPrinted Wiring Board BD Switch Section IC121 CXD2654R IC152 BH6511FS-E2IC406 M62016L Main section IC301 UDA1341TS/N2IC381 M5218AL IC441 LB1641 Pin No Pin Name Function IC PIN FunctionsIC101 RF Amplifier CXA2523AR BD board MNT0 FOK MNT1 ShckMNT2 Xbusy MNT3 SlocMvci AsyoAsyi AvddTfdr FfdrFrdr FS4IC501 System Control M30620MC-400FP Main board OPT DEL OPT SEL Mode SEL PB-PREC/PB SDASection Exploded Views Case and Back Panel SectionFront Panel Section 6162Mechanism Section MDM-5A 225 226 206 205Base Unit Section MBU-5A 251 252Section Electrical Parts List ResistorsDisplay Display KEY SW Main PIN, Connector 7P Inductor MDS-JE330 Main SW VOL SEL Vibrator