HUAWEI TECHNOLOGIES CO., LTD.
Page 29
4.8 Troubleshooting Transmitter Faults
4.8.1 Transmitter Circuit
The microphone circuit consists of C524, R509, B506, D507, C525, R506, R512 and C526, The
MICBIASP outputted by U100 forms the offset voltage circuit of the microphone after impedance
splitting. The AD signals are transmitted to U100 through two blocking capacitors.
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