Sony MDS-JE630 service manual Checks Prior to Parts Replacement and Adjustments

Page 8

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

(6-2 : See page 24)

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

(6-3 : See page 24)

Specified value : Below 10% offset

 

 

 

 

Focus bias check

• Error rate check

• Replace the optical pick-up

(6-4 : See page 25)

Specified value : For points a, b, and c

 

 

C1 error : About 200

 

 

AD error : Above 00

 

 

 

 

C PLAY check

• Error rate check

• Replace the optical pick-up

(6-5 : See page 25)

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

(6-6 : See page 25)

C1 error : Below 80

• Check for disconnection of the circuits around the

 

AD error : Below 2

overwrite head

 

 

 

 

 

 

 

If occasionally unsatisfactory:

 

 

 

• Check if the overwrite head is distorted

 

 

 

• Check the mechanism around the sled

 

 

 

Temperature

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

• Check for disconnection of the circuits around

NG

 

D101 (BD board)

compensation

 

(@@, ## are both arbitrary numbers)

• Check the signals around IC101, IC121, CN102,

offset check

 

 

CN103 (BD board)

(6-1 : See page 24)

 

 

 

 

 

 

 

 

 

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.

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Contents Specifications MDS-JE520MDM-5D MBU-5DSELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Section Servicing Notes Table of ContentsDiagrams Flexible Circuit Board Repairing JIG for Checking BD Board Waveform IOPRecord Procedure Checks Prior to Parts Replacement and Adjustments Criteria for Determination Measure if unsatisfactoryRetry Cause Display Mode ProcedureHexadecimal nBinary Conversion Table Front Panel Rear Panel Section GeneralLocation of Controls Page Front Panel Section Section DisassemblyCase Main Board Mechanism Deck Section MDM-5DSlider CAM Base Unit MBU-5D, BD BoardSW BOARD, Loading Motor M103 Section Test Mode Precautions for USE of Test ModeSetting the Test Mode Releasing the Test ModeSelecting the Test Mode Display Contents Mark 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 Emission Precautions for USE of Optical PICK-UP KMS-260APrecautions for Adjustments Laser power meterTemperature Compensation Offset Check Laser Power CheckCheck Prior to Repairs Traverse CheckPlay Check MO Error Rate Check CD Error Rate CheckFocus Bias Check Self-Recording/playback CheckInitial Setting of Adjustment Value Temperature Compensation Offset AdjustmentLaser 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 AdjustmentAdjustment Location Section Diagrams Block Diagram Servo Section∙ Signal Path MDS-JE630Block Diagram Main Section REC AnalogPlay Analog OUT Circuit Boards Location Semiconductor Location Printed Wiring Board BD BoardSee page 36 for Circuit Boards Location MDS-JE630 Schematic Diagram BD Board 2/2 See 43 for Waveforms. See page 56 for IC Block DiagramsSchematic Diagram SW Board Printed Wiring Board SW BoardWaveforms BD Board Main BoardPrinted Wiring Board Main Board See 36 for Circuit Boards Location Semiconductor LocationSchematic Diagram Main Board 1/2 See page 43 for Waveforms Line with mark !are critical for safety Ref. No Location D757 IC761 IC771 Q757 Q781 Q782 Schematic Diagram Panel Section See page 43 for Waveform IC152 BH6511FS-E2 IC Block Diagrams BD Board IC101IC121 CXD2656R IC471 LB1641 Main Board IC310 M5293L IC431 LA5632IC321 AK4524 IC PIN Function Description Xlat SrdtSens XrstXras XWEAsyo AsyiSrdr SfdrSprd SpfdAder ByteCnvss RSTSTB ChackLdin LD-LOWSCL SctxClock SET0 Clock SET1Section Exploded Views Chassis Section17 #1 12 A-4724-696-A Main BOARD, Complete65 A-4724-698-A Display BOARD, Complete 67 A-4724-697-A KEY SW BOARD, CompleteMechanism Section 216 207 203 222 223 225 202 201226 206 204 209 4-988-466-21 Spring ELECTROSTATIC, LeafBase Unit Section MBU-5D Section Electrical Parts List Display Display HP KEY KEY SW KEY SW Main Ground Plate TC74HCU04APGP1F38R Digital in OPT1 GP1F38R Digital in OPT2Ferrite Bead Inductor Line FilterMain Power SW SW MANUAL, Instruction ENGLISH, French Accessories & Packing MaterialsCORD, Connection Audio
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MDS-JE630 specifications

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