Samsung SCH-211 Service Manual page 40

6-1-3 Abnormal Backlight Operation
Press any button on the phone.
'H' level output from
U101 pin 60?
'H' level
from U101 pin 60 drive Q114
through R189?
Normal Q115 operation?
The voltage
applied to LCD (M101)
pins 31, 32?
Backlight LED on
Samsung Electronics-Contents may change without notice.
N
Y
N
Y
N
Y
N
Y
Check U101 pin 60. Replace if required.
Check R188, R189, and Q114.
Replace if required.
Check R190, R191, R193, R194,
and Q115. Replace if required.
Resolder R186 and R187.
Troubleshooting
6-3