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8. Level 3 Repair
8-4-34. GSM 850/900 TX
NORMAL CONDITION
Catch the channel?
Check RFS1000
about ≥ 23dBm?
Check C1006 ≥ 23dBm
Check C1016 ≥ 23dBm
Check component
soldering status ok?
U1010,U1002
Check soldering status(U2102)
and the voltage at
C2081,C2003,C2077=0.8V,
C2002=0.875V,
C2008,C2007=1.7V,
C2086,C2087=1.2V
Receiver is OK?
END
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No
No
No
No
Yes
Yes
Yes
Yes
Check the ANT1000
Yes
Resolder or change
RFS1000,C1006,L1003,C1005
Yes
Resolder or change
F1000, C1016
No
Resolder or change
U1010,U1002
No
Resolder or change
U2102
No
Resolder or change
UCP500
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