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6-4
Troubleshooting
6-1-4 Abnormal Key Data input
Check initial status
Scanning signals
output from U101, C5, B4, D5, A5
C6, A5, D6
Check U101
Check U101 A2, A3, C4, B5, E5
Check J103
Normal key data input?
Replace the key pad assembly
END
Yes
Yes
Yes
Yes
No
No