Samsung Galaxy A52s Service Manual page 32

8. Level 3 Repair
8-4-9-1. Microphone Part - Main MIC
Check operation of bottom MIC
With *#0*# loopback RCV_1stMic
Check Sub PBA
L1010 Voltage = 1.8V
Check Sub PBA
L1012 MAIN_MIC_P
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YES
YES
YES
END
NO
Swap Main PBA CODEC(U7002)
NO
Swap SUB PBA MIC1001 or L1012