Philips DVP 5980, Руководство по обслуживанию, Страница: 15 / 45

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 U5
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 U5 and peripheral components
Re-solder or replace the defective parts
Check the connection
between U5
Correct connection
Replace U5 or loader.
Yes
Check whether there is
laser voltage (2V for VCD
and 2.2V for DVD) on
Collector of Q15 &Q16
Check if there is RFO signal
on pin17 of HA1. (The
normal RFO signal is a clear
reticulated wave)
CheckU5,U6,andperiph
eral components are
eroded or badly
soldered.
Trouble shooting chart