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SECTION 5
ELECTRICAL ADJUSTMENTS
5-1. On Part Replacement and Adjustment
• Perform the checks and adjustments of the MDM and MBU blocks following the procedure below .
The procedure is changed depending on the replaced part.
•
Temperature compensation
offset check
•
Laser power check
•
Traverse check
•
Focus bias check
•
C PLAY check
•
Self record/playback check
NG
Part Replacement and repairing
OWH is replaced ?
NO
Either OP, IC171, IC101, or
IC121 is replaced ?
NO
YES
NO
YES
YES
NO
Initial setting of adjustment value
OP or IC171 is replaced ?
Either IC171 or D101 is replaced ?
Recording the IOP information
(IOP value that is recorded in OP)
Temperature compensation offset adjustment
• Traverse adjustment
• Focus bias adjustment
• Error rate adjustment
• Auto gain adjustment
OK
YES
The error occurs by other cause.
Perform the mechanism check of
the sled and spindle system, etc.
• Abbreviation
OP : Optical pick-up
OWH : Overwrite head
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