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Flow Chart of Troubleshooting
10-9
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10-1-6 Transceiver 3G Rx part
Continuous RX ON
Channel 10700, high gain mode(LNA)
Cell power :-60dBm
YES
NO
Check soldered status of
R116
Check the pin #1 of
MOD101 > -63dBm
YES
Check pin #21 of
MOD101
≥
-64dBm
NO
Resolder or Change
MOD101
OR check C115>1.4V
C116<0.4V,C117<0.4
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
resolder or change
Check F202 & C217,C220
Check pin #2 of
DUF201
≥
-65dBm
Resolder or Change L212,C219
Check or Resolder Q202
OR
Check #1 of Q202
=1.8V
Check soldered status of
C120,C125,L107
Resolder C200
END
Check the pin #1 of F202
>-51dBm
Check pin #5 of
Q202 > -51dBm
Check pin #2 of
Q202
≥
-66dBm
Summary of Contents for SGH-L770
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