7. key data input – Sharp SGH-F250 User Manual
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Flow Chart of Troubleshooting
9-18
9-7. Key Data Input
Check Initial Operation
Yes
When one of the keys is
pushed,
is it displayed on LCD?
Check the Dome sheet & Key Pad
No
Yes
When one of the keys is
pushed,
KBIO signal is OK?
Replace the Key PBA
No
Yes
END