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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
8-4-35. GSM1800/1900, CDMA BC1, WCDMA 1/2/4, LTE B1/2/3/4/7/25/30/38/40/66 DRX
END
Resolder or change
ANT2002, ANT2003, V2010
Resolder or change
F2503
Resolder or change
L2015
Resolder or change
U22000
Resolder or change
UCP500
No
No
No
No
No
No
NO
Yes
Yes
Yes
Yes
Yes
Receiver is O.K?
No
Yes
Yes
Check V2010
≤
-65dBm ?
Check C2008
≤
-65dBm ?
Check component
soldering status ok?
F2503
Check L2015
≤
-65dBm ?
Check component soldering status OK at
U2100
Resolder or change
C2072, L2044, C2008
Resolder or change
U2100
NORMAL CONDITION
Catch the channel?