Flow Chart of Troubleshooting

9-9. Key Data Input

Check Initial Operation

Yes

When one of the main keys

is pushed,

is it displayed on LCD?

Yes

When one of the Navi keys

is pushed,

dose it work well?

Yes

END

No

No

Check the Dome sheet

Check the Dome sheet and LCD FPCB

9-16

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Sharp SGH-J200 manual Key Data Input