Samsung SGH-C110 Service Manual page 13

SGH-C110 Flow Chart of Troubleshooting
7. Speaker
* Play on 16-poly melody before testing.
Receiver does not work
Check the pin1 of
U500's clock ≒ 3.9MHz
Check the pin17 & 18
of U500 is around
audio signal ≒ 2V
Check the wave of pin3
& 9 of U502
Check the wave of
C412 & C421
Is Speaker working ?
Yes
Yes
Yes
Yes
Yes
END
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No
No
No
Check U502 and soldering
No
Check the path from U502 to
No
Replace the Speaker
2-10
Check U200
Check U500
SPK400