Panasonic DVD-S52E Manual page 45

11.4.1.3. Check after adjustment
Play test disc or any other disc to make sure there is no picture degradation in the inner, middle
and outer peripheries, and no audio skipping. After adjustment is finished, lock each adjustment
screw in position using screw lock.
11.4.1.4. Procedure for screw lock
Please perform a screw lock in which by the side of the tip or head of an adjustment screw.
<When a screw lock is performed to the tip part side of an adjustment screw>
1. After adjustment, remove top panel.
2. After pulling out a tray to the position which does not become
obstructive,remove clamper plate.
3. Fix adjustment screw with screw lock.
4. After fixing, reassemble clamper plate and top panel.
<When a screw lock is performed to the head side of an adjustment screw>
1. After adjustment, remove top panel, front panel, rear panel and
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