Figure 9-31 Display Screen Circuit Diagram 3 - Huawei U8815 Maintenance Manual

U8815
Maintenance Manual

Figure 9-31 Display screen circuit diagram 3


The U8815 adopts TFT4.0 LCD with a resolution of 800 x 480 pixels.
The LCD of the U8815 employs the MIPI interface. It requires only two pairs of low voltage
differential signal (LVDS) cables and a pair of power cables, and supports 60 Hz refreshment
rate. With frame synchronization function, the LCD uses MDP_VSYNC of GPIO_097 as the
data transmission synchronization signal to avoid LCD breakage.

Failure: The handset can be powered on, but its LCD is blank.
Solution: Check the LCD.
Figure 9-32 shows the troubleshooting process for no LCD display.
Issue 1.0 (2012-02-13)
Analysis
Troubleshooting Process
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
9 Principles and Failure Analysis
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