Receiver Part; Speaker Part - Samsung SGH-C300 Service Manual

3-1-5. Receiver Part

There is no sound from the Receiver
Is the terminal of Receiver
Is there any signals at the
pin#A11 and pin#N12 of
UCP100 ?

3-1-6. Speaker Part

There is no sound from the Buzzer
Is the terminal of Speaker
Is there any signals at the
pin#A13 and pin#N12 of
UCP100 ?
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Yes
O.K ?
Yes
Yes
END
Yes
O.K ?
Yes
Yes
END
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No
Replace the Receiver
No
Check UCP100
Check R106,R107 (LCD PCB Part)
No
Replace the Speaker
No
Check U300,R338,R342
3-12
Flow Chart of Troubleshooting