Panasonic SJ-MJ55GH, Service Manual

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Fig. 4
5. Operation Checks and Component Replacement
Procedures
- This section describes procedures for checking the operation of
the major printed circuit boards and replacing the main
components.
- For reassembly after operation checks or replacement, reverse the
respective procedures. Special reassembly procedures are
described only when required.
- After replacing the main components (optical pickup or traverse
motor, etc.) of mechanism unit block, change to the adjust mode,
and then perform the adjustments (Laser power, off-set, ROM/
RAM).
5.1. Checking for the P.C.B.