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SGH-P510 Flow Chart of Troubleshooting and Circuit Diagrams
2-
12
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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 U301
No
Replace the Dome Sheet OR
Check if the V403,404,405 are opened
No
Yes
Check the Keypad &
Dome Sheet
Replace or Adjust
the Keypad & Dome Sheet