Philips PET717 Service Manual page 18

Only DVD disc or only disc except DVD can be played
Only DVD disc, or only disc
except DVD can be Played.
Go
Check the
connection between
24pin and the loader.
Yes
Check laser voltage
output on Collector of Q18
Yes
Check whether pins of U3 and
peripheral components are
badly soldered, defected
Yes
Check whether Q18
in good condition
Yes
Change U3 or the loader.
FFC
No
(2.3V)
No
No
No
Correct connection
5-4
Check the loaded circuit
Check the solder status on U3 and
peripheral components
Replace the bad spare parts
Trouble shooting chart