Umts Receiver - Samsung SGH-Z620 Service Manual

9-2-7. UMTS Receiver

Continuous RX ON
RF Input : 10700 CH
AMP : -40dBm
NORMAL CONDITION
Catch the channel ?
CN800 Check
Pin #2,3 ≥ -45dBm ?
D800 Check
Pin #4 ≥ -45dBm ?
DUF700 Check
Pin #5 ≥ -45dBm ?
U700 Check
Pin#18 ≥ -65dBm ?
F702 check
pin#3,4 ≥ -65dBm ?
U700 check
pin#8,9 ≥ -65dBm
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YES
YES
YES
YES
YES
YES
YES
THE END
Flow Chart of Troubleshooting and Circuit Diagrams
NO
NO
Resolder or Change
NO
NO
Resolder or change
NO
NO
NO
Change the path of F702
9- 30
Check antenna
contack
CN800
D800 Resolder or
Change
DUF700
U700 Resolder or
change
F702
Resolder or change
and U700