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Flow Chart of Troubleshooting
9-14
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9-1-5 : Abnormal TOUCH KEY operation
Press Touch Key
U704 pin1
output exist?
Check pin3 in U704
If high, replace U704
NO
YES
NO
Change the TSP Module
END
C726 goes High to
Low for every
20ms?
U710 pin3
output exist?
Replace U710
NO
YES
NO
Check pin 2,3 in U709
If output exist, replace U709
U709 pin 6,7
output exist?
YES
Содержание GT-I8910
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