Philips PD7010, Service Manual, Page: 13 / 36

5-3
Disc cannot be read
.
No
Yes
No
Yes
No
Yes
Yes
No
No
Yes
Disc cannot be read.
Check the loaded circuit
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 and U5
Correct connection
Replace U5 or loader.
Yes
Check whether there is
laser voltage (1.9V for CD
and 2.3V for DVD) on
Collector of Q9 &Q10
Check if there is PUHRF signal
on the pin96 of U4. (The
normal PUHRF signal is a clear
reticulated wave)
Check U4, U5, and
peripheral components are
eroded or badly soldered.
Trouble shooting chart