Samsung Galaxy A52s Service Manual page 33

8. Level 3 Repair
8-4-9-2. Microphone Part - Sub(2nd) MIC
Check operation of Top MIC
with *#0*# loopback SPK_2ndMic,
Check Main PBA
C7003 Voltage = 1.8V
Check Main PBA
L7003 SUB_MIC_P
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YES
YES
YES
END
NO
Swap Main PBA CODEC(U7002)
NO
Swap Main PBA MIC7000 or L7003