Panasonic SJ-MJ55GH, Service Manual

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Fig. 2
4.2. Grounding for electrostatic breakdown prevention
1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity
from your body. (as shown in
Fig. 3 )
2. Work table grounding
Put a conductive material (sheet) or steel sheet on the area where
the traverse deck (optical pickup) is placed, and ground the sheet.
(as shown in
Fig. 4 )
Caution
The static electricity of your clothes will not be grounded through
the wrist strap.
So, take care not to let your clothes touch the traverse deck (optical
pickup).
Fig. 3