Samsung SGH-N625, Service Manual

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Flow chart of trouble shooting 5-12
5-7 Key Data Input
Check Initial operation
Replace the PBA
Are
the pin 1, 3, 5 and 7
of CN211 low?
When
one of the keys is pushed,
one of pin 1, 3, 5 and 7 of CN211
is high ?
Key PCB is OK ?
Resolder pin 1, 3, 5 and 7
of CN211
END
Replace the Key PCB
Yes
No
Yes
Yes
Yes
No
No