Philips DVP5980 Service Manual page 16

Only DVD disc or only disc except DVD can be played
Only DVD disc, or only disc
except DVD can be Played.
Check laser voltage (2V)
output on Collector of Q15,
if pin 23 of U5 is at low level.
Check whether pin 1 to pin38
of
components
soldered, defected
Change U5 or the loader.
Go
Check the FFC
connection between
24pin and the loader.
Yes
Yes
Check whether there
is voltage variance on
pin 23 of U5.
Yes
U5 and peripheral
are badly
Yes
Check Q11, Q12, Q13
whether in good
condition
Yes
4-5
No
Check the loaded circuit
Check the solder status on U5 and
No
peripheral components
No
check if bad solder exist on U5 and
peripheral components
No
No
Correct connection
T rouble shooting chart
Replace the bad spare parts