4-4
Disc cannot be read.
No
Yes
No
Yes
No
Yes
Yes
No
No
Yes
Disc cannot be read.
Check the loaded circuit
1.Check voltage on pin 112 of U2 varies
between 0 and 3.3V:
Æ3.3V for VCD
Æ0V for DVD
2.Check whether peripheral components
are eroded or defect
Check the FFC connection
between 24P and the loader.
Check U2 and peripheral components
Re-solder or replace the defective parts
Check the connection
between U2
Correct connection
Replace U2 or loader.
Yes
Check whether there is laser
voltage (2V for VCD and 2.2V for
DVD) on Collector of Q6 &Q5
Check if there is RFO signal on
pin17 of CN2. (The normal RFO
signal is a clear reticulated wave)
CheckU2,U3,andperipheral
components are eroded or
badly soldered.
Trouble shooting chart
Remark: Trouble shooting chart for
DVP3160K/XX
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