Philips DVP3880K/55 Service Manual page 21

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 (2.4V) output
on L10, if pin10 of U20 is at low
level.
Yes
Check whether there
is voltage variance on
pin 17 of U20.
Yes
Check whether pins of U20
and peripheral
are badly soldered, defected
Yes
Check Q5,
whether in
condition
Yes
Change U20 or the loader.
FFC
No
No
No
components
No
Q7
good
4-5
Check the loaded circuit
Check the solder status on U20 and
peripheral components
check if bad solder exist on U20 and
peripheral components
No
Replace the bad spare parts
Correct connection
Trouble shooting chart