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8. Level 3 Repair
Check soldering status(U2102) and the
voltage at C2081,C2003,C2077=0.8V,
C2002=0.875V, C2008,C2007=1.7V,
C2086,C2087=1.2V
8-3-33. LTE 39/41 DRX
Check L2046
≤
-65dBm ?
Check L2015
≤
-65dBm ?
Check component soldering status OK at
U2100, C2144 ?
Resolder or change
ANT2004, C2072, C2017,L2046
Resolder or change
F2004, L2015
Resolder or change
U2100, C2144
Resolder or change
C2144, U2100
Resolder or change
F2006, C2145, L2063
Resolder or change
C2145, L2092, F2006
No
No
No
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Check C2145,L2092
≤
-65dBm ?
Check C2144
≤
-65dBm ?
Check component soldering status OK at
F2006, C2145 ?
No
Resolder or change
C2139
No
Check C2139
≤
-65dBm ?
No
Resolder or change
U2102
Receiver is O.K?
No
Resolder or change
UCP500
END
Yes
Yes
Yes
NORMAL CONDITION
catch the channel?