Samsung SM-A507FN Service Manual page 99

8. Level 3 Repair
8-4-23. GSM DCS/PCS, WCDMA B1/2, LTE B1/3 PRx
It is not catching the channel
In normal condition
Check ant path any damage
(ANT9004 ~ ANT9000)
Is it ok? (SUB PBA)
Check RX path any damage
(RFS1000~U1000)
Check U1000, U2004
(Crack, open, etc), is it ok?
Change the board
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YES
)
YES
Is it ok?
YES
any damage
i
YES
YES
END
NO Resolder or change
Antenna path components
NO
Resolder or change
RX path components
NO
Resolder or change
U1000, U2004