LG KG290 - Key Back-Light Illumination

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3. TECHNICAL BRIEF
3.13 Key Back-light Illumination
In key back-light illumination, there are 12 Blue LEDs in Main Board, which are driven by
KEY_BACKLIGHT signal from AD6721.
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Only for training and service purposes
KEY BACKLIGHT
VBAT
47
R348
R344
47
EVL5M02200
VA311
LD303
EVL5M02200
VA312
VA310
NA
LD305LD302
R345
47
R347
47
R346
47
LD300 LD304
R349
47
LD301
LED_KEY
Figure 3-15. KEY BACK-LIGHT ILLUMINTION