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5-7
SGH-Q208 Flow Chart of Troubleshooting and Circuit Diagrams
5-7. Key Data Input
Check initial operation
Y
Y
N
Y
When one of the keys is
pushed, one of pin [2,4,6,8,10]
of CN202 is “High”?
Check the U601
N
Y
When one of the keys is
pushed, one of pin [1,3,5,7,9] of
CN202 is “High”?
Resloder CN202 or replace
the key PCB
END
Check the connection between
CN202 and LCD module PCB