Advertisement
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 Q10 &Q7
Yes
Check
peripheral components are
eroded or badly soldered.
Yes
Check if there is RFO signal
on
the
pin17
normal RFO signal is a clear
reticulated wave)
Yes
Check the connection
between U5
Yes
Replace U5 or loader.
U1,
U5,
and
of
J4.
(The
5-3
No
Check the loaded circuit
1.Check voltage on pin 15 of U1
varies between 0 and 3.3V:
No
3.3V for CD
0V for DVD
2.Check
whether
components are eroded or defect
No
Re-solder or replace the defective parts
No
Check U5 and peripheral components
No
Correct connection
Trouble shooting chart
peripheral
Advertisement
