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Flow Chart of Troubleshooting
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9-19
9-8. Key Data Input
When one of the keys is
pushed,
Isn't it displayed on LCD?
Check the Dome sheet & Key Pad
END
No
Yes
Yes
Check Initial Operation
When one of the keys is
pushed,
KEYIN(0,2), KEYOUT(0,3),
KEYIO(0,2)
signal is OK?
Replace the PBA
No
Yes