Keypad Back-Light Illumination - LG KP550 Service Manual

3. TECHNICAL BRIEF

3.9 Keypad back-light illumination

There are 2 snow white color LEDs on Key FPCB for keypad illumination. Keypad Back-light is
controlled by SM-Power Flash LED port which has constant current control function. The whole
configuration of the SM-POWER Flash LED drivers is shown in below Figure11.
LGE Internal Use Only
Figure 11 Keypad Back-light LEDs
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