7. key data input – Sharp SGH-F250 User Manual

Page 46

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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

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