Table of Contents
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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 (2V for VCD and 2.2V for
DVD) on Collector of Q8 &Q9
Yes
Check
U3,
peripheral components are
eroded or badly soldered.
Yes
Check if there is RFO signal on
pin8 of CN2. (The normal RFO
signal is a clear reticulated wave)
Yes
Check the connection
between U3
Yes
Replace U3 or loader.
All manuals and user guides at all-guides.com
4-4
No
No
U6,
and
No
No
No
Check the loaded circuit
1.Check voltage on pin 44 of U3 varies
between 0 and 3.3V:
3.3V for VCD
0V for DVD
2.Check whether peripheral components
are eroded or defect
Re-solder or replace the defective parts
Check U3 and peripheral components
Correct connection
Trouble shooting chart
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