4-5
Only DVD disc or only disc except DVD can be played
No
No
Yes
Only D V D disc, or only dis
exce
t DVD can be Pla
ed.
C heck the FFC
connection betw een
24pin and the loader.
C heck the loaded circuit
C heck the solder status on U 3 and
peripheral com ponents
C heck w hether there
is voltage variance on
in 22 of U3.
check if bad solder exist on U 3 and
peripheral com ponents
R eplace the bad spare parts
C heck w hether pin 1 to pin38
of U 3 and peripheral
com ponents are badly
soldered, defected
C heck Q 5, Q6, Q8
whether in good
Yes
Yes
Yes
Go
Correct connection
C hange U3 or the loader.
No
No
Yes
C heck laser voltage (2V ) outpu
on Collector of Q8, if pin 22 of U3
is at low level.
Trouble shooting chart
No
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