User Guide

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SGH-C110 Flow Chart of Troubleshooting

2-11

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8. Key Data Input

'#pad'(See the picture

below) is 'high'(≒

2.8V)

Check the Initial Operation

END

Yes

When one of the key

is pushed, #pad is

'low'

Yes

Check U300

Replace the Dom Sheet or

Check if the V402,403,404 are

opened

Yes

Check the Keypad &

Dom Sheet

Replace or Adjust

the Keypad & Dom Sheet