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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 Q6 &Q5
Yes
Check U2,U3,andperipheral
components are eroded or
badly soldered.
Check if there is RFO signal on
pin17 of CN2. (The normal RFO
signal is a clear reticulated wave)
Yes
Check the connection
between U2
Yes
Replace U2 or loader.
Yes
4-14
Remark: Trouble shooting chart for
No
Check the loaded circuit
1.Check voltage on pin 112 of U2 varies
between 0 and 3.3V:
No
3.3V for VCD
0V for DVD
2.Check whether peripheral components
are eroded or defect
No
Re-solder or replace the defective parts
No
Check U2 and peripheral components
No
Correct connection
Trouble shooting chart
DVP5166K/XX, DVP5168K/XX
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