Earphone
Does waveform at
TP3 & 4 fluctuate?
YES
Does waveform at
TP5 & 6 fluctuate?
YES
Change another Ear-Mic set
and Try again.
NO
Check U401 (MT6226AT)
status
Check component status
NO
(C1115, C1114, R1106, R1108, R1125,
R1126,U1101,B1101,B1102)
82