Philips DVP3136/94 Service Manual page 17

Only DVD disc or only disc except DVD can be played
Only DVD disc, or only disc
except DVD can be Played.
Go
Check
connection between
24pin and the loader.
Yes
Check laser voltage (2.3V) output
on Collector of Q2, if pin181 of
U1is at low level.
Yes
Check whether there
is voltage variance on
pin 182 of U1.
Yes
Check whether pins of U1 and
peripheral components
badly soldered, defected
Yes
Check Q2 whether
in good condition
Yes
Change U1 or the loader.
the FFC
are
No
4-5
No
Check the loaded circuit
Check the solder status on U1 and
No
peripheral components
No
check if bad solder exist on U1 and
peripheral components
No
Replace the bad spare parts
Correct connection
Trouble shooting chart