4-5
Only DVD disc or only disc except DVD can be played
No
No
Yes
Only DVD disc, or only disc
exce
p
t DVD can be Pla
y
ed.
Check the FFC
connection between
24pin and the loader.
Check the loaded circuit
Check the solder status on U1 and
peripheral components
check if bad solder exist on U1 and
peripheral components
Replace the bad spare parts
Check whether pins of U1 and
peripheral components are
badly soldered, defected
Check Q103, Q104
whether in good
condition
Yes
Yes
Yes
Go
Correct connection
Change U1 or the loader.
No
No
Yes
Check whether there is laser
voltage (1.9V for CD and 2.4V for
DVD) on L101(R35) and
L102(R32).
Trouble shooting chart
No
Whether voltage on pin14/pin15 of U1
varies between 2.4V and 3.3V (PIN14
=2.4V and PIN15=3.3V for CD;
PIN14=3.3V and PIN15=2.4V for DVD)