Receiver Part - Samsung SGH-M310 Service Manual

Flow Chart of Troubleshooting

10-1-5. Receiver Part

There is no sound from the Receiver
Is the terminal of Receiver
Is there any signals at the
pin#P11 and pin#R12 of
10-1-6. SPK Part
There is no sound from the Buzzer
Is the terminal of Speaker
Is there any signals at the
pin#R13 and pin#R14 of
Yes
O.K ?
Yes
UCD300 ?
Yes
END
Yes
O.K ?
Yes
UCD300 ?
Yes
END
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No
Replace the Receiver
No
Check U400,R413,R415
No
Replace the Speaker
No
Check UCD300
Check D1, D2 (LCD PCB Part)
10-8