Philips SDV434/19, Service Manual

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4-5
Only DVD disc or only disc except DVD can be played
No
No
Yes
Only DVD disc, or only disc
except DVD can be Played.
Check the FFC
connection between
24pin and the loader.
Check the loaded circuit
Check the solder status on U3 and
peripheral components
Check whether there
is voltage variance on
pin 22 of U3.
check if bad solder exist on U3 and
peripheral components
Replace the bad spare parts
Check whether pin 1 to pin38
of U3 and peripheral
components are badly
soldered, defected
Check Q5, Q6, Q8
whether in good
condition
Yes
Yes
Yes
Go
Correct connection
Change U3 or the loader.
No
No
Yes
Check laser voltage (2V) output
on Collector of Q8, if pin 22 of U3
is at low level.
Trouble shooting chart
No