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SGH-C100 Flow Chart of Troubleshooting
4-
10
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7. Speaker
* Play on 16-poly melody before testing.
Check the pin1 of
U500's clock ≒ 3.9MHz
Receiver does not work
Check the pin17 & 18
of U500
is around
audio signal ≒ 2V
Check U200
Check U500
Is Speaker working ?
END
No
Yes
Yes
No
Replace the Speaker
Yes
No
Check the wave of pin3
& 9 of U502
Check U502 and soldering
No
Yes
Check the wave of
C412 & C421
Check the path from U502 to
SPK400
No
Yes