Sony MDS-JE530 service manual 8, 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 SERVICE MANUALSupplied accessories MDS-JE530SELF-DIAGNOSISFUNCTION – 2 –Items of Error History Mode Items and Contents Table of Error Codes– 3 – Selecting the Test ModeTABLE OF CONTENTS 6.DIAGRAMSDISASSEMBLY ELECTRICAL ADJUSTMENTSFlexible Circuit Board Repairing Notes on chip component replacement– 5 – ADVARSEL– 6 – JIG FOR CHECKING BD BOARD WAVEFORMDisplay Precedure – 7 –Record Precedure CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS – 8 –– 9 – RETRY CAUSE DISPLAY MODEPrecedure Fig. 1 Reading the Test Mode DisplayReading the Display – 10 –Hexadecimal nBinary Conversion Table SECTION GENERAL – 11 –LOCATION OF CONTROLS This section is extracted from instruction manualPage SECTION DISASSEMBLY – 13 –CASE FRONT PANEL SECTIONMECHANISM DECK SECTTION MDM-5D – 14 –MAIN BOARD BASE UNIT MBU-5D,BD BOARD – 15 –SLIDER CAM – 16 – SW BOARD, LOADING MOTOR M1031. PRECAUTIONS FOR USE OF TEST MODE 2. SETTING THE TEST MODESECTION TEST MODE – 17 –– 18 – 5. SELECTING THE TEST MODE5-3. Non-VolatileMemory Mode EEP MODE – 19 –5-1.Operating the Continuous Playback Mode 7. TEST MODE DISPLAYS – 20 –6. FUNCTIONS OF OTHER BUTTONS – 21 – MEANINGS OF OTHER DISPLAYS– 22 – SECTION ELECTRICAL ADJUSTMENTS1.PARTS REPLACEMENT AND ADJUSTMENT 2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION 4. PRECAUTIONS FOR ADJUSTMENTSLaser power meter – 23 –Checking Procedure 6-2.Laser Power CheckSpecification – 24 –6-5.C PLAY Checking MO Error Rate Check CD Error Rate Check– 25 – 6-4.Focus Bias Check7. INITIAL SETTING OF ADJUSTMENT VALUE 9. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT10. LASER POWER ADJUSTMENT Setting Procedure11. TRAVERSE ADJUSTMENT – 27 –Specification Adjusting ProcedureAdjusting Procedure 12.FOCUS BIAS ADJUSTMENT– 28 – 13.ERROR RATE CHECK 15.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT13-1.CD Error Rate Check 13-2.MO Error Rate CheckAdjustment Location – 30 –– BD BOARDSide A – – BD BOARDSide B –MDS-JE530 SECTION DIAGRAMS 6-1.BLOCK DIAGRAM – MD SERVO Section –– 31 – – 32 –6-2.BLOCK DIAGRAM – MAIN Section – MDS-JE530– 33 – – 34 –Note on Schematic Diagram – 35 –Note on Printed Wiring Board – 36 – • Circuit Boards Location6-4.PRINTED WIRING BOARD – BD Board – – 38 –•See page 36 for Circuit Boards Location •Semiconductor LocationMDS-JE530 – 39 –– 40 – 6-6.SCHEMATIC DIAGRAM – BD Board 2/2 – See• – 41 –– 42 – MDS-JE5306-7.SCHEMATIC DIAGRAM – SW Board – 6-8.PRINTED WIRING BOARD – SW Board –– 43 – – 44 –6-9.PRINTED WIRING BOARD – MAIN Board – See• – 45 –– 46 – page 36 for Circuit Boards Location– 47 – – 48 –MDS-JE530 Page Page 41 PageMDS-JE530 – 49 –– 50 – – 51 – – 52 –MDS-JE530 • Semiconductor Location– 53 – – 54 –MDS-JE530 Page 47 Page•IC Block Diagrams – BD Board – – 55 –– 56 – IC101– 57 – IC310M5293L IC431– 58 – 6-14.IC PIN FUNCTION DESCRIPTION– 59 – •BD BOARD IC121 CXD2656R– 60 – – 61 – – 62 – •MAIN BOARD IC501 M30624MG-207FPSYSTEM CONTROLLER– 63 – – 64 – 1CHASSIS SECTION SECTION EXPLODED VIEWS– 65 – 2FRONT PANEL SECTION 61 64 61 63 61 66 61 6151 53 59 54 52– 67 – 3MECHANISM SECTION MDM-5D 213 207202 201 223 207– 68 – 4BASE UNIT SECTION MBU-5D 252263 270 254 253SECTION ELECTRICAL PARTS LIST – 69 –DISPLAY – 70 –DISPLAY KEY SW– 71 – KEY SW MAIN– 72 – – 73 – MAIN– 74 – MAINMAIN POWER SW– 75 – MDS-JE530 – 76 –Sony Corporation 9-928-824-11
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