Huawei Y300 Maintenance Manual page 66

Y300 Maintenance Manual
Figure 9-39 Receiver circuit diagram (1)
Figure 9-40 Receiver circuit diagram (2)
The Y300 provides three kinds of audio output:
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Troubleshooting
Fault symptom: After a call is established, no voice is received.
Handling: Troubleshoot the fault according to the process shown in Figure 9-41.
Issue 1.0 (2013-01-24)
Receiver output: Signals are delivered by the CPU.
Speaker output: Signals are delivered by the PM8029 to the PA and then the speaker.
Headset output: The Y300 provides the two-channel headset.
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9 Principles and Failure Analysis
61