Wcdma Receiver - Samsung SGH-J750 Service Manual

9-15. WCDMA Receiver

RF input : CH center freq : +67.7kHz
RX ON
Amp : -50dBm
Yes
C131
>= -53dBm
Yes
C120=2.5V,
C127, C128= 1.5V
C121 =0V
C118
>= -60dBm Yes
L336
Yes
>= -60dBm
C353
>=2.75V
Yes
C319
>= -50dBm
C237,C239
>= -53dBm
Resolder
U200(TRANCEIVER)
END
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Resolder RFC100(RF CN)
No
Check U402(PMIC)
No
Resolder RFS100(ASM)
No
Resolder DUF302(Duplexer)
No
Check U402(PMIC)
Resolder U301(LNA)
Resolder F202(SAW)
9-23
Flow Chart of Troubleshooting