4-5
Only DVD disc or only disc except DVD can be played
No
No
Yes
Only DVD disc, or only disc
exce
t DVD can be Pla
ed.
Check the FFC
connection between
24pin and the loader.
Check the loaded circuit
Check the solder status on U20 and
peripheral components
Check whether there
is voltage variance on
in 17 of U20.
check if bad solder exist on U20 and
peripheral components
Replace the bad spare parts
Check whether pins of U20
and peripheral components
are badly soldered, defected
Check Q5, Q7
whether in good
Yes
Yes
Yes
Go
Correct connection
Change U20 or the loader.
No
No
Yes
Check laser voltage (2.4V) output
on L10, if pin10 of U20 is at low
level.
Trouble shooting chart
No