Samsung SCH-211 Service Manual page 41

Troubleshooting
6-1-4 Abnormal Key Data Input
Check initial status.
Scanning signals
output from U101 pins159,
160, 163-167?
Resolder U101
pins 168-170, 172, and 173.
Resolder J101.
Normal key data input?
6-4
N
Y
Y
N
Y
END
Resolder U101 pins 159, 160, and 163-167.
Replace the Keypad assembly.
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