Sony MDS-JE630 service manual Section Electrical Adjustments, Parts Replacement And Adjustment

SECTION 5

ELECTRICAL ADJUSTMENTS

1.PARTS REPLACEMENT AND ADJUSTMENT

• Check and adjust the MDM and MBU as follows. The procedure changes according to the part replaced

•Temperature compensation offset check

•Laser power check

•Traverse check

•Focus bias check

•C PLAY check

•Self-recording/playback check

OK

NG

Parts Replacement and Repair

Has the OWH been replaced? YES

NO

Has OP, IC171, IC101, or

IC121 been replaced?

YES

Initial setting of the adjustment value

NO

Has OP or IC171 been replaced? NO

YES

IOP information recording (IOP value labeled on OP)

Has IC171 or D101 been replaced?

YES NO

Temperature compensation offset adjustment

•Laser power adjustment

•Traverse adjustment

•Focus bias adjustment

•Error rate adjustment

•Focus bias check

•Auto gain adjustment

• Abbreviation

OP : Optical pick-up

OWH : Overwrite head

Check the sled and spindle mechanisms.

Other causes can be suspected.

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