Huawei Ascend G300 Maintenance Manual

U8815
Maintenance Manual
9 Principles and Failure Analysis
Issue 1.0 (2012-02-13)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
52
Table 9-10 Audio output
Signal
Description
Reference Measurement or
Wave Form
EAR1_AMP_1_OP
The signal is output to the
receiver.
None
EAR1_AMP_1_ON
The signal is output to the
receiver.
None
SPK_OUT_L_P
This signal is output to the
speaker through the power
amplifier.
None
SPK_OUT_L_M
This signal is output to the
speaker through the power
amplifier.
None

Troubleshooting process
Failure: After a call is established, no sound can be heard by the other party.
Solution:
Figure 9-40 shows the troubleshooting process for sound failure.

Huawei Ascend G300 Specifications

General

Brand	Huawei
Model	Ascend G300
Category	Cell Phone
Language	English