Samsung GT-i8910 Service Manual page 51

Flow Chart of Troubleshooting
9-1-5 : Abnormal TOUCH KEY operation
Press Touch Key
U704 pin1
NO
Check pin3 in U704
output exist?
If high, replace U704
YES
NO
C726 goes High to
Low for every Change the TSP Module
20ms?
YES
U710 pin3
NO
Replace U710
output exist?
YES
NO
Check pin 2,3 in U709
U709 pin 6,7
If output exist, replace U709
output exist?
END
9-14
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