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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. Technical Brief
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.
Figure. Schematic of Power Keypad back light circuit
Figure. Schematic of KEY back light circuit
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Содержание Vodafone GM750
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