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NOTES REGARDING
COMPACT DISC PLAYER
1) Preparations
1)
2)
Compact disc players incorporate
a great many ICS as
well as the pickup (laser diode). These components
are
sensitive to, and easily affected by, static electricity. If
such static electricity is high voltage, components
can be
damaged, and for that reason components
should be
handled with care.
The pickup is composed of many optical components
and
other high-precision
components.
Care must be taken,
therefore, to avoid repair of storage where the
temperature
of humidity is high, where strong magnetism
is present, or where there is excessive dust.
2) Notes for repair
1)
2)
3)
Before replacing a component
part, first disconnect the
power supply lead wire from the unit.
All equipment,
measuring
instruments and tools must be
grounded.
The workbench should be covered with a conductive
sheet and grounded.
When removing the laser pickup from its conductive bag,
do not place the pickup on the bag. (This is because there
is the possibility of damage by static electricity.)
REPAIRS (CD SECTION)
4)
5)
6)
7)
To prevent AC leakage, the metal part of the soldering iron
should be grounded.
Workers should be grounded by an arm band (1 M S2).
Care should be taken not to permit the laser pickup to
come in contact with clothing, in order to prevent static
electricity changes in the clothing to escape from the arm
band,
The laser beam from the pickup should NEVER be directly
facing the eyes or bare skin.
A
\
h [
Resistor
-
(lMfl)
—
/
/
1 / /
Sheet
–3-
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