Panasonic SJ-MJ75 Service Manual page 6

4.2. Caution for Replacement of Mechanism Unit (Optical
Pickup)
If you remove the flexible P.C.B. of the optical pickup from the connector of
main P.C.B., perform it after shorting with a solder build-up the short land to
protect the breaking down by static electricity.
The optical pickup that is supplied as replacement parts is shorted with a solder
build-up the short-land of flexible P.C.B. to protect the breaking down by static
electricity.
After connecting the flexible P.C.B. of the optical pickup to the connector of
main P.C.B., remove the solder build-up on the short-land and confirm that is
opened. (As shown in Fig.1)
4.3. Grounding for electrostatic breakdown prevention
1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity from your
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