Huawei U8860 Maintenance Manual page 78

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U8860

Maintenance Manual

The CH0/CH1 receives environment light and generates environment light value by

processing the data internally. Then the system automatically adjusts the LCD brightness

according to the environment light value. The approach sensor is to prevent the phone from

misoperations caused by the contact of the face and touch panel. As a result, if the inferred

emitted by the LED inside the chip is blocked, it will be reflected. Then the sensor will

receive the reflected light through the photodiode and identify the obstacle position. When the

approach status achieves a certain threshold, the system triggers the operation to shut down

the touch panel.

Troubleshooting process

Failure: The approach sensor is faulty.

Solution:

Issue 1.0 (2011-11-14)

Huawei Proprietary and Confidential

9 Principles and Troubleshooting

Table of Contents

Troubleshooting