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8. Level 3 Repair
NORMAL CONDITION
Catch the channel?
Check soldering
status(U2009) and the
voltage at
C2008,C2032 =1.0V &
C2013,C2017=1.8V &
C2018=1.2V
8-4-40. GSM 850/900 TX
Yes
No
No
Check RFS 1000
about
≥
23dBm?
Check the ANT, Sub PBA
Yes
Check L1046
≥
23dBm
No
Resolder or change
RFS1000, F1000, C1095, C1002,
C1080
Yes
Check C1070
≥
23dBm
No
Resolder or change
L1046, U1000
Yes
Check component
soldering status ok?
U1014, C1069
Resolder or change
U1014, C1069
No
Receiver is OK?
Resolder or change
UCP500
No
Yes
Yes
Resolder or change
U2009
No
END
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