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3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.13 Key Back-light Illumination
In key back-light illumination, there are 2 white LEDs in Main Board and 4 LEDs in Upper board, which
are controlled by KEY_BACKLIGHT1 and KEY_BACKLIGHT3 each on AD6726,
Figure 3.12 KEY BACK-LIGHT ILLUMINTION
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