Handling Precautions For Traverse Deck - Panasonic SA-DK3 Service Manual

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outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.
Note:
When the protection circuitry functions, the unit will not operate
unless the power is first turned off and then on again.
4. Accessories

5. Handling Precautions for Traverse Deck

The laser diodes 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).
5.1. Handling 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 handling.
2. In order to prevent static electricity damage to the laser diode, use
a short pin or similar tool to short the optical pickup's flexible
circuit boards after they have been disconnected from the main
circuit board.
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
6

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