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SGH-Z510 Flow Chart of Troubleshooting and Circuit Diagrams
2-2-2. DCS Receiver
Rx On
RF Input: 698 CH
Cell Power:-50dBm
YES
RFS800( RF Connector)
Pin #3 ≥ -60dBm ?
YES
U800
(Antena Switch Module)
Pin#3 ≥ -60dBm ?
YES
F801(DCS Rx Saw )
Pin #3,4 ≥ -60dBm ?
YES
U600
(RTR6250 DCSINP,INM)
Pin #34,35 ≥ -60dBm ?
YES
Check R103 & R104
(RX IQ signal) ≥ 1V
NO
Check UCP100(MSM6250A)
YES
END
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Resolder or Change
NO
NO
NO
Check C812,L808
Resolder or Change F801
NO
Resolder or Change
YES
Check U600(RTR6250 VDDA)
V_2.85TX,RX,OSC≒ 2.85V ?
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RFS800
YES
Resolder or Change
U800
Pin#26=L Pin27=H
Pin28=H?
Check Antenna Switch
NO
U600
YES
Check& Resolder
R614,R617,C630,C631
Check& Resolder
VDDA of U600
NO
2-27
U800
Control Path
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