Read Panasonic RM-V53GAE / RM-V53GAEA Service Manual online
The laser diode in the traverse deck (optical pick-up) may break
down due to potential difference caused by static electricity of
clothes or human body.
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 pick-up).
traverse deck (optical pick-up).
3.1. Handling of traverse deck
(optical pick-up)
1. Do not subject the optical pick-up to static electricity as it is
extremely sensitive to electrical shock.
2. To protect the laser diode against electrostatic breakdown,
be sure that the short land of the flexible board (FFC board)
should be short-circuit by solder before inserting a short pin
or similar object into the tip of the flexible board.
(Referto Fig. 3-1. )
should be short-circuit by solder before inserting a short pin
or similar object into the tip of the flexible board.
(Referto Fig. 3-1. )
3. Take care not to apply excessive stress to the flexible board
(FFC board).
4. Do not turn the variable resistor (laser power adjustment). It
has already been adjusted. (Refer to Fig. 3-1. )
Fig. 3-1.
3.2. Caution when replacing
traverse deck
The traverse deck short-circuits the foil (B) to protect the laser
diode against electrostatic breakdown. Be sure to cut the foil
(B) before making connection. Take care not to make contact
with cutting point each other. (Refer to Fig. 3-1. )
diode against electrostatic breakdown. Be sure to cut the foil
(B) before making connection. Take care not to make contact
with cutting point each other. (Refer to Fig. 3-1. )
3.3. Grounding for electrostatic
breakdown prevention
3.3.1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity
from your body. (Refer to Fig. 3-2. )
from your body. (Refer to Fig. 3-2. )
Fig. 3-2.
3.3.2. Work table grounding
Put a conductive material (sheet) or steel sheet on the area
where the traverse deck (optical pick-up) is placed, and ground
the sheet. (Refer to Fig. 3-3. )
where the traverse deck (optical pick-up) is placed, and ground
the sheet. (Refer to Fig. 3-3. )
Fig. 3-3.
Caution:
The static electricity of your clothes will not be grounded
through the wrist strap.
through the wrist strap.
So take care not to let your clothes touch the traverse deck
(optical pick-up).
(optical pick-up).
2 Precaution of Laser Diode
Caution:
This product utilizes a class 1 laser. Invisible laser radiation is emitted from the optical pick-up lens when the unit is turned on:
1. Do not look directly into the pick-up lens.
2. Do not use optical instruments to look at the pick-up lens.
3. Do not adjust the preset variable resister on the optical pick-up.
4. Do not disassemble the optical pick-up unit.
5. If the optical pick-up is replaced, use the manufacture’s specified replacement pick-up only.
6. Use of control or adjustments or performance of procedures other than those specified herein may result in hazardous
radiation exposure.
3 Handling Precautions for Traverse Deck
4
RM-V53GAE / RM-V53GAEA
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