Philips DVP5980 Service Manual page 15

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 Q15 &Q16
Yes
CheckU5,U6,andperiph
eral components are
eroded or badly
soldered.
Yes
Check if there is RFO signal
on pin17 of HA1. (The
normal RFO signal is a clear
reticulated wave)
Yes
Check the connection
between U5
Yes
Replace U5 or loader.
4-4
No
Check the loaded circuit
1.Check voltage on pin 112 of U5
varies between 0 and 3.3V:
No
2.Check
components are eroded or defect
No
Re-solder or replace the defective parts
No
No
Correct connection
T rouble shooting chart
3.3V for VCD
0V for DVD
whether peripheral
Check U5 and peripheral components