LG G5500 Manual page 36

3.4.13. Keypad back-light Illumination
There are 12 Deep Blue LEDs in Main Board for Keypad Backlight.
Keypad Back-light is driven by 'LEDB' line from IOTA .
3.4.14. LCD Illumination
There are 3 LEDs in the LCD module for LCD backlighting. DC-DC converter is mounted in LCD
module.
Figure 17. Keypad Back-light Scheme
Figure 18. LCD Back-light (LED_EN) Scheme
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