ADV-700
3
DIAGNOSTICS OF OPTICAL PICKUP AND REPLACING TRAVERSE UNIT
Make failure diagnostics of the Optical Pickup as follows.
If the laser drive current becomes more than 1.5 times of the initial value, the Optical Pickup should be replaced.
The laser drive current is registered on the seal attached to the rear of the Mecha. Unit.
In case of replacing the Pickup, change the whole part of the Traverse Unit.
No mechanical adjustment is necessary after the replacement.
Disc no read,
unsteady playback, etc.
Laser drive current check
HF wave form check
(Refer to page 79, 80)
Present value exceeds
the initial value by 1.5 times
Traverse Unit replacing
(See page 9 for details)
Laser current registering
after replacement
Step: Disc playback
Write the measured value
on the seal attached to the Mecha. Unit
* As to the measuring method, refer to page 4
Label Indication of DVD Mechanism
Laser current consumption value
ex) DVD ***mA, CD ***mA
Example:
DVD 30mA
CD 30mA
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1
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5
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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