Receiver Part; Speaker Part - Samsung SGH-U900 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
and R529?
Pin#8 of U502 is Low ?
Check SOC700 and Camera/SPK FPCB.

10-1-6. Speaker Part

There is no sound from the Speaker
Is the terminal of Speaker
Is there any signals at
Is there any signals at L500
Pin#8 of U502 is High?
Check SOC700 and Camera/SPK FPCB.
Yes
O.K ?
Yes
No
R527
Yes
No
Yes
END
Yes
O.K ?
Yes
R505
and R508
Yes
and L501
END
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No
Replace the Receiver
Check UCP300
Check R530
No
Replace the Speaker
No
Check UCP300
No
Check the circuit around
Check R530
10-10
U501