Huawei Ascend - Page 44

Y210 Mobile Phone
Maintenance Manual
9 Principles and Failure Analysis
Issue 1.0 (2012-11-28)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
39
Figure 9-11 LCD backlight circuit
Backlight
signals
Anode of the backlight LED
LED_A
Anode of the
backlight LED
Cathode of the backlight LED
LED_K
Cathode of the
backlight LED
Brightness control signals from the
LCD
PWM_OU
T
Reserved
Brightness control signals from the
phone's main chip
LCD_BL_
PWM
GPIO1 (PM8029)