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5-7
SGH-Q100 Flow Chart of Troubleshooting and Circuit Diagram
5-7. Key Data Input
Check initial operation
Y
Y
N
Y
When one of the keys is
pushed, one of pin [11:15] of
CN201 is “High”?
Check the U601
N
Y
When one of the keys is
pushed, one of pin [6:10] of
CN201 is “High”
Resloder CN201 or replace
the key PCB
END
Check the connection between
CN201 and LCD-Key PCB
