U9500 Maintenance Guide
9 Troubleshooting
Issue 1.2 (2012-6-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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Handling process for types 1 and 2 failures:
Restart the phone, or restore the phone to its factory defaults and then restart it.
If the problem persists, conduct a replacement test to locate the fault. If the fault is on the
camera module, replace the camera module. If the fault is on the PCBA, check the camera
power supply circuit and flashlight driver.
Handling process for type 3 failure:
Replace the camera module.
9.2.16 Phone Audio Failure
Cause
Figure 9-42 shows the components, damage on which can cause the phone audio failure.
Figure 9-42
Components that might be damaged
Handling Process for the Ringing Failure
Figure 9-43 shows the process for handling the ringing failure.
