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3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.11.6. LED(KEY/Indicator) Light
There are 4 White LEDs in Main key backlight circuit, which are driven by KPD_DR_N line from
PM7540.
In addition, there is 1 RGB LED in LED Notification-RGB backlight circuit, which are driven by
KEBY_BACKLIGHT line from MSM7200 GPIO78/84/85.
[Figure1.26] Schematic of Power Keypad back light circuit
[Figure1.27] Schematic of KEY back light circuit
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