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Disc cannot be read .
Disc cannot be read.
Yes
Check the FFC connection
between 24P and the loader.
Yes
Check whether there is
laser voltage (1.9V for CD
and 2.3V for DVD) on
Collector of Q11 &Q10
Yes
Check
U1,
peripheral components are
eroded or badly soldered.
Yes
Check if there is RFO signal
on
the
pin8
normal RFO signal is a clear
reticulated wave)
Yes
Check the connection
between U2
Yes
Replace U2 or loader.
5-3
All manuals and user guides at all-guides.com
No
No
U2,
and
No
No
of
HA1.
(The
No
Trouble shooting chart
Check the loaded circuit
1.Check voltage on pin 23 of U2
varies between 0 and 3.3V:
3.3V for CD
0V for DVD
2.Check
whether
peripheral
components are eroded or defect
Re-solder or replace the defective parts
Check U2 and peripheral components
Correct connection
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