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SGH-Z320i Flow Chart of Troubleshooting and Circuit Diagrams
2-
29
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2-2-5. UMTS Receiver
Continuous RX ON
RF Input : 10700 CH
AMP : -40dBm
NORMAL
CONDITION
Catch the channel ?
YES
NO
RFS800 Check
Pin #3
≥
-45dBm ?
U800 Check
Pin #20
≥
-45dBm ?
U700 Check
Pin#18
≥
-65dBm ?
Check antenna contack
RFS800 Resolder or Change
U800 Resolder or Change
THE END
NO
NO
YES
YES
YES
U700 Resolder or change
DUF600 Check
Pin #3
≥
-45dBm ?
DUF600 Resolder or change
NO
YES
NO
F701 Resolder or change
Change the path of F701
and U700
U700 check
pin#8,9
≥
-65dBm
F701 check
pin#3,4
≥
-65dBm?
YES
YES
NO
NO