Panasonic SA-AK48, Руководство по обслуживанию

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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).
4.1. 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
4.2. Grounding for electrostatic
breakdown prevention
1. Human body grounding
Use the anti-atatic 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 optical pickup is placed, and ground the sheet.
(sa shown in Fig.2)
Fig.2
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)
4.3. Caution when Replacing the
Traverse Deck
The traverse deck has a short point shorted with solder protect
the laser diode against electrostatic breakbown. Be sure to
remove the solder from the short point before making
connections.
CAUTION:
THIS PRODUCT UNTILIZES A LASER. USE OF
CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF
PROCEDURES
OTHER THAN THOSE SPECIFIED
HEREIN MAY RESULT IN HAZARDOUS RADIATION
EXPOSURE.
4 Handling Precautions for Traverse Deck
4
SA-AK48