Denon ADV-1000 Service Manual page 3

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3 7 63 1515 0
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.
Example: DVD 30mA
TE
L 13942296513
Label Indication of DVD Mechanism
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.
http://www.xiaoyu163.com
CD 30mA
x ao
y
i
http://www.xiaoyu163.com
8
Disc no read,
unsteady playback, etc.
Laser drive current check
HF wave form check
(Refer to page 76, 77)
Traverse Unit replacing
(See page 10 for details)
Laser current registering
Q Q
3 6 7 1 3
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
u163
.
2 9 9 4 2 8
Present value exceeds
the initial value by 1.5 times
1 5 0 5 8 2 9 9 4
Laser current consumption value
ex) DVD ***mA, CD ***mA
m
co
ADV-1000
9 9
2 8 9 9
3