The laser diode in the traverse deck (optical pickup) may break
down due to potential difference caused by static electricity of
1. Do not subject the traverse deck (optical pickup) to static
electricity as it is extremely sensitive to electrical shock.
2. The short land between the No. 5 (GND) and No. 4 (LD)
pins on the flexible board is shorted with a solder build-up
to prevent damage to the laser diode. (As shown in Fig. 1.)
To connect to the PC board, be sure to open by removing
the solder build-up, and finish the work quickly.
3. Take care not to apply excessive stress to the flexible board
(FFC).
4. Do not turn the variable resistor (laser power adjustment). It
has already been adjusted. (As shown in Fig. 1.)
1. Human body grounding
Use the anti-static wrist strap to discharge the static
electricity from your body. (As shown in Fig. 2.)
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.
Caution
Caution
Caution
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).
clothes
or
human
body.So,
be
careful
of
electrostatic
breakdown during repair of the traverse deck (optical pickup).
Fig. 1
Fig. 2
5
5
5
5 Handling
Handling
Handling
Handling Precautions
Precautions
Precautions
Precautions for
for
for
for Traverse
Traverse
Traverse
Traverse Deck
Deck
Deck
Deck
5.1.
5.1.
5.1.
5.1. Handling
Handling
Handling
Handling of
of
of
of traverse
traverse
traverse
traverse deck
deck
deck
deck (optical
(optical
(optical
(optical pickup)
pickup)
pickup)
pickup)
5.2.
5.2.
5.2.
5.2. Grounding
Grounding
Grounding
Grounding for
for
for
for electrostatic
electrostatic
electrostatic
electrostatic breakdown
breakdown
breakdown
breakdown prevention
prevention
prevention
prevention
5
SL-
SL-
SL-
SL-HD50
HD50
HD50
HD505
5
5
5