Samsung SM-G970U, Service Manual, Page: 107 / 112

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8. Level 3 Repair
NORMAL CONDITION
Catch the channel?
Check soldering status(U2102)
and the voltage at
C2081,C2003,C2077=0.8V,
C2002=0.875V,
C2008,C2007=1.7V,
C2086,C2087=1.2V
8-4-37. LTE B14 TX
No
No
Check RFS 1000
about
≥ 23dBm?
Check the ANT, Sub PBA
Yes
Check C1006
≤-65dBm
No
Resolder or change
RFS1000, C1005, L1003, C1006
Yes
Check component
soldering status ok?
U1002
Resolder or change
U1002
No
Yes
Receiver is OK?
Resolder or change
UCP500
Yes
Resolder or change
U2102
No
END
Check C1016
≤-65dBm
Resolder or change
F1000, C1016
No
Check C1031, L1016
≤-65dBm
Resolder or change
C1031, L1016
Yes
No
No
Yes
Yes
Yes
Check component
soldering status ok?
F1002
Resolder or change
F1002
No