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8. Level 3 Repair
Check soldering status(U22000)
and the voltage at
C22045,C22021,C22001=0.8V,
C22028=0.875V,
C22019,C22008=1.7V,
C22043,C22031=1.2V
C22042=1.8V
C22042=1.8V
8-4-34. CDMA BC0/10, GSM 850/900, WCDMA B5/8, LTE
B5/8/12/13/14/18/19/20/26/28/29/48/71 DRX
Receiver is O.K?
END
Resolder or change
ANT2000, ANT2007, V2007, C2004,
C2005
Resolder or change
C2094, F2000
Resolder or change
L2009, F2001
Resolder or change
U22000
No
No
No
No
No
NO
Yes
Yes
Yes
Yes
Resolder or change
INT13001
No
Yes
Yes
NORMAL CONDITION
Catch the channel?
Check C2004
≤
-65dBm ?
Check C2503
≤
-65dBm ?
Check C2094
≤
-65dBm ?
Check L2009
≤
-65dBm ?
Resolder or change
C2503, L2023
Check component soldering status OK at
U2091?
Resolder or change
U2091,
No
Check component soldering status OK at
INT13001?
Yes
Yes
Resolder or change
UCP500
No
