Denon S-302 Service Manual page 15

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DIAGNOSTICS OF OPTICAL PICKUP 3 7 63 1515 0
AND REPLACING TRAVERSE UNIT
Make failure diagnostics of the Optical Pickup as follows.
If the laser drive current (Iop) becomes more than 1.5 times of
the initial value, the Optical Pickup should be replaced.
The laser drive current initial value is checked by "Iop checked
Method" of next page.
In case of replacing the Pickup, change the whole part of the
Traverse Unit.
No mechanical adjustment is necessary after the replace-
ment.
Disc no read, unsteady playback, etc.
TE
L 13942296513
Laser drive current (Iop) check
HF wave form check
(Refer to WAVE FORMS)
Traverse Unit replacing
www
Laser current (Iop) memorizing after replacement
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http://www.xiaoyu163.com
Laser drive current initial value:
DVD:
CD:
Present value exceeds the ini-
tial value by 1.5 times
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