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Only For Training And Service Purposes - LG GM750 Service Manual

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3.12.5. LED(KEY/Indicator) Light
There are 2 White LEDs in sub 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 MSM7200A GPIO90/89/88.
Copyright © 2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

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Figure. Schematic of Power Keypad back light circuit
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Figure. Schematic of KEY back light circuit
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3. Technical Brief
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LGE Internal Use Only

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