Microphone Part (Main Mic) - Samsung GT-P3100 Servise Manual

8-3-6. Microphone Part (Main MIC)

Check main microphone function
in voice call receiver mode
or in Voice Recording mode
Check Sub-PCB module
where main MIC is placed
for any damage (Tear in FPC,
etc)
Check the voltage at
C412 = 2.8V
Check component soldering
statuses of C420, C421
END
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Yes
Yes
Yes
Yes
No
Change the Sub-PCB module
No
Resolder or replace U402
No
Resolder or replace C420, C421
8-13
Level 3 Repair