Figure 9-38 Call Reception Circuit Diagram 4; Figure 9-39 7227A Audio Processing Diagram - Huawei U8815 Maintenance Manual

U8815
Maintenance Manual

Figure 9-38 Call reception circuit diagram 4

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Figure 9-39 shows the 7227A audio processing diagram.

Figure 9-39 7227A audio processing diagram

U8815 provides three audio outputs:
1.
2.
3.
Table 9-10 describes the three audio outputs.
Issue 1.0 (2012-02-13)
Analysis
Receiver output, outputting signal through PM8029.
Speaker output, output by PM8029 to the speaker through the power amplifier.
Headset output. U8815 adopts binaural headset.
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9 Principles and Failure Analysis
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