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LGE Internal Use Only
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
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LGE Property
3.9 Keypad back-light illumination
There are 4 snow white color LEDs on Qwerty Key and 2 snow white color LEDs on slide Key for keypad
illumination. Slide Keypad Back-light is controlled by SGold3 PWM port which has a duty control function.
And Qwerty Key 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.
Содержание GT350
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