SL-SX475EG, SL-SX475EB, SL-SX475E2, SL-SX480EG, SL-SX482EE - Panasonic Audio Service Manual (repair manual). Page 3

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The laser diode in the traverse deck (optical pickup) may break
down due to potential difference caused by static electricity of
clothes or human body.
So, be careful of electrostatic breakdown during repair of the
traverse deck (optical pickup).

1. The traverse deck (optical pickup) is an extremely high-

precision construction and must not be subjected to
impact, excessive vibration, or other types of rough han-
dling.

2. To protect the laser diode against electrostatic break-

down, be sure that the short land A and B of the flexible
board (FFC board) should be short-circuit by solder
before pulling out the FFC. Then inserting a short pin or
similar object intothetip of the flexible board.
(Refer to Fig.1)

3. Handle the flexible circuit boards with care; excessive

force could cause them to be broken.

4. Do not turn the pre-set variable resistor (for adjustment of

the laser power); it has been adjusted at the factory.
(as shown in Fig.1)

Fig.1

The new traverse deck short-circuits by the short pin, the foil
(C) and short lands to protect the laser diode against electro-
static breakdown. Be sure to replace to new one following pro-
cedures.

1. Remove the short pin from the FFC, and then connect it

to the connector.

2. Cut the foil (C). (Refer to Fig.1) (Take care not to make

contact with cutting point each other.)

3. Unsolder the short lands. (Refer to Fig.1)

1. Human body grounding

Use the anti-static wrist strap to discharge the static elec-
tricity from your body. (as shown in Fig.2)

2. Work table grounding

Put a conductive material (sheet) or steel sheet on the
area where the optical pickup is placed, and fround the
sheet. (as shown in Fig.3  )

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.2

Fig.3