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XL-V184BK
XL-V284BK
Maintenance
of Laser
Pickup
(1) Cleaning the pickup lens
Before you replace the pickup, please try to clean the lens with
a alcohol soaked cotton swab.
f - ,
• •
t
(2) Life of the laser diode
RF level (amplitude of eye pattern) is decreased when the life of
laser diode is run out.
Check that the R F level is over 0.7Vp-p and under 1.2V.
The pickup should be exchanged with new one for run out of its
life if the value is 0.7Vp-p below.
(3) Semi-fixed resistor on the APC PC board
The semi-fixed resistor on the APC printed circuit board which
is attached to the pickup is used to adjust the laser power. Since
this adjustment should be performed to match the characteristics
of the whole optical block, do not touch the semi-fïxed resistor.
If the laser power is lower than the specified value, the laser
diode is almost worn out, and the laser pickup should be
replaced.
If the semi-fixed resistor is adjusted while the pickup
is functioning normally, the laser pickup may be
damaged due to excessive current.
^
Replacement
of ~
Laser Pickup
Turn off the power switch and, disconnect the
power cord from the ac outlet.
Replace the pickup wit
(Refer to "Pickup Remo
11 a normal one.
val" on the previous page)
Plug the power cord in, and turn the power on.
At this time, check that the laser emits for
about 3seconds and the objective lens moves
up and down.
Note: Do not observe the laser beam directly.
Play a disc.
Check the eye-pattern T P l
Finish.
1-24 (No. 20503)
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