Philips DVP6600, Руководство по обслуживанию

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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 44 of U4 varies
between 0 and 3.3V:
Æ 3.3V for VCD
Æ
0V for DVD
2.Check whether peripheral components
are eroded or defect
Check the FFC connection
between 24P and the loader.
Check U4 and peripheral components
Re-solder or replace the defective parts
Check the connection
between U4
Correct connection
Replace U4 or loader.
Yes
Check whether there is laser
voltage (2V for VCD and 2.2V for
DVD) on Collector of
Q6
ǃ
Q5.
Check if there is RFO signal on
pin8 of CN2. (The normal RFO
signal is a clear reticulated wave)
Trouble shooting chart
Check U4, U5, and
peripheral components are
eroded or badly soldered.