![background image](http://html2.mh-extra.com/html/samsung/sm-g970u/sm-g970u_service-manual_4751085109.webp)
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document
without Samsung’s written authorization is strictly prohibited.
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
8-4-39. CDMA BC1, GSM 1800/1900, WCDMA B1/2/4, TDSCDMA B34/39, LTE
B1/2/3/4/25/66 TX
Yes
Yes
No
Yes
Yes
Check RFS 1000
≤ -65dBm
Check the ANT, Sub PBA
No
Check C1006
≤-65dBm
Yes
Resolder or change
RFS1000, C1005, L1003, C1006
No
Check L1000
≤-65dBm
Yes
Resolder or change
F1000, L1000
No
Check component
soldering status ok?
U1004
Resolder or change
U1004
No
No
Receiver is OK?
Resolder or change
UCP500
No
Yes
Yes
Yes
Resolder or change
U2102
No
END
Check L1041
≤-65dBm
Resolder or change
L1041