Samsung SM-A526B Service Manual page 44

8. Level 3 Repair
8-4-16. MST
MST not working
Check ANT contact Any damage.
ANT3002,ANT3003
Check (crack, open, etc)
C3009,TA3000,C3042,C3001
C3006,C3010,U3001,C3011
Check U3002 any damage
Change the board
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YES
YES
YES
NO
YES
END
NO
Antenna path components.
NO
C3009,TA3000,C3042,C3001
C3006,C3010,U3001,C3011
NO
Resolder or Replace the U3002
Re-solder or change
Re-solder or change
components