Philips DVP3000K - Page 14

4-4
Disc cannot be read.
No
Yes
No
Yes
No
Yes
Yes
No
No
Yes
Disc cannot be read.
C heck the loaded circuit
1.C heck voltage on pin 44 of U3 varies
betw een 0 and 3.3V:
Æ3.3V for VCD
Æ0V for DVD
2.C heck w hether peripheral com ponents
are eroded or defect
C heck the FFC connection
betw een 24P and the loader.
C heck U3 and peripheral com ponents
Re-solder or replace the defective parts
C heck the connection
betw een U3
Correct connection
R eplace U3 or loader.
Yes
C heck w hether there is lase
r
voltage (2V for V C D and 2.2V fo
r
DVD) on Collector of Q8 &Q 9
C heck if there is R FO signal on
pin8 of CN2. (The normal RFO
signal is a clear reticulated wave)
Trouble shooting chart
C heck U 3, U6, and
peripheral com ponents are
eroded or badly soldered.
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