Panasonic SA-AK640PL Service Manual

Contents

Panasonic SA-AK640PL Service Manual Manual pdf 6 page image

3 Handling Precautions For Traverse DeckThe laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by the static electricity ofclothes or our human body.So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).· Way of handling the 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. Do not to apply excessive stress to the flexible board (FFC board). When removing or connecting the short pin, finish the jobin as short time as possible.4. Do not turn the variable resistor for laser power adjustment. (It is pre-adjusted during production time)Grounding for electrostatic breakdown prevention1. Human body groundingUse the anti-static wrist strap to discharge the static electricity from your body.2. Work table groundingPut a conductive material (sheet) or steel sheet on the area where the traverse deck (optical pickup) is place, and ground thesheet.Caution :The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let your clothes touch thetraverse deck (optical pickup).Caution when replacing the Traverse DeckThe traverse deck has a short point shorted with solder to protect the laser diode against electrostatics breakdown. Be sure toremove the solder from the short point before making connections.6SA-AK640PL