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6-1-3 Abnormal Backlight Operation
Press and button on the phone
'H' level output from
U101 L7 to J105 pin 19?
Normal U139 operation?
6-3
Yes
'H' level input to
U139 pin 4,5?
Yes
Yes
Normal EL?
Yes
EL ON
No
No
Check U139, L201, Q139
and its neighboring circuits.
No
No
SAMSUNG Proprietary-Contents may change without notice
Check U101 L7.
Replace if required
Check FPC.
Replace if required
Replace if required
Check EL.
Replace if required
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