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G700-U10 Smartphone
Maintenance Manual
10.4.10 Microphone Circuit
Circuit Diagram
Figure 10-45 Microphone circuit
Circuit Analysis
The VMIC power supply output by the MT6589 provides bias voltage for the microphone.
Sound collected by the microphone are converted into MICP0 and MICN0 differential signals
and sent to the CPU for processing. C1120 and C1121 block the DC voltage. R1106 is the
bias resistor. C1110 and C1111 filter the RF interference out.
Issue 1.0 (2013-07-22)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
10 Circuit and Failure Analysis
71
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