![background image](http://html.mh-extra.com/html/samsung/sm-g975f/sm-g975f_service-manual_1191996131.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
8-4-43. WCDMA B1/2/4, TDSCDMA B34/39, LTE B1/2/3/4/25/34/39 Tx
Check L1023
: About 0dBm ?
Resolder or change
U3000 or L1023 or C1031 or C1028
YES
NO
Check C1050
: About 33dBm ?
Resolder or change
C1050
NO
YES
Check component soldering status OK at
U1005 ?
Resolder or change
U1005
NO
YES
Check component soldering status OK at
F1000 ?
Resolder or change
F1000
NO
YES
Check L1004
: About 33dBm ?
Resolder or change
L1004 or C1013 or C1010 or L1006
NO
YES
Check RFS100
: About 33dBm ?
Resolder or change
RFS100
NO
YES
ANT is O.K?
END
Change
Coaxial cable or mechanical material
YES
NO