Handling Precautions For Traverse Deck - Panasonic SA-PM27E Service Manual

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6 Handling Precautions For Traverse
Deck
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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).
Handling of traverse deck (optical pickup)
1. Do not subject the traverse deck (optical pickup) to static electricity as it is extremely
sensitive to electrical shock.
2. To prevent the breakdown of the laser diode, an antistatic shorting pin is inserted into the
flexible board (FFC board).
3. Take care not to apply excessive stress to the flexible board (FFC board). When removing
or connecting the short pin, finish the job in as short time as possible.
4. Do not turn the variable resistor (laser power adjustment). It has already been adjusted.
Grounding for electrostatic breakdown prevention
1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity from your body.
2. Work table grounding.
Put a conductive material (sheet) or steel sheet on the area where the traverse deck (optical
pickup) is place, and ground the sheet.
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).
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