If the power is not
Supplied 2
A
Does
an output of
IC50, B4pin and B5pin work
normally?
Yes
Does an
output of Q90~Q908
pin work normally?
Yes
Normal
Samsung Electronics
No
Does an output of IC50
Refer to Wave pattern image
of Table12-2
No
Replace IC90
Refer to Wave pattern image
of Table12-2
No
work normally?
Yes
Check IC50
Troubleshooting
Replace IC50
4-9