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3.8.13. 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 .
3.8.14. LCD Illumination
There are 3 LEDs in the LCD module for LCD backlighting. MLED and SLED is connected driver ic of
LCD module.
Figure 17. Keypad Back-light Scheme
Figure 18. LCD Back-light Scheme
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