Mic - Huawei Y511-U030 Repair Manual

XXXX The basic version Repair Manual

9.4.5 Mic


Circuit Principle Diagram

Circuit analysis:
A circuit connected with the outside of a microphone, when in normal work, power supply chip
provides a bias voltage to the microphone, the microphone to pickup, signal through a coupling
capacitor into the power chip.

Fault analysis and treatment process:
No words can check whether the normal pathway of MIC welding, voice input signal
AU_VIN0_P, AU_VIN0N and power supply chip. Bad welding or replace the relevant device
according to the chip, power supply, MIC peripheral circuit, etc..
2013-09-25
V1.0
华为机密，未经许可不得扩散
internal public
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