Fm Radio Part - Samsung SGH-U900 Service Manual

Flow Chart of Troubleshooting

10-1-8. FM RADIO Part

FM Radio does not work
Turn on the Radio.
Yes
No
check the Voltage at C127
Check U400
(2.6V) and C128 (2.6V) ?
Yes
No
Is there any signal at R620? Check the Earphone and U100
Yes
No
Is there any signal at C123
Resolder the U100
and C125?
Yes
No
Check UCP300
Replace the UCP300
Yes
Check the EAR/SPEAKER Path.
10-16
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