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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 & C2018=1.2V &
C2013, C2017=1.8V
8-4-30. GSM 850/900, CDMA BC0/10, WCDMA B5/8, LTE
B5/8/12/13/17/18/19/20/26/28/29 RX
No
Yes
Yes
Check RFS 1000
≤
-65dBm
Check the ANT, Sub PBA
No
Check L1050
≤
-65dBm
Yes
Resolder or change
RFS1000, C1002, C1080
No
Check L1070
≤
-65dBm
Yes
Resolder or change
F1000, L1046
No
Check component
soldering status ok?
U1000, C1083
Resolder or change
U1000, C1083
No
No
Receiver is OK?
Resolder or change
UCP500
No
Yes
Yes
Yes
Resolder or change
U2009
No
END
Check L1058
≤
-65dBm
Resolder or change
C1083, U1000
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