LG GB220 - KEY BACLKLIGHT LED Interface

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3.14 KEY BACLKLIGHT LED Interface
Key Backlight LED is controlled by switch (Q500, Q200). If KEY_BL_EN is high, Current is flowing from VBAT to
LED. Then Light emitted from The LED.
Figure 3-14-1 Key Backlight Block
Key Backlight LED
D201
DNI_VARISTER_1005
100K
R212
R211
1.2K
R209
20
LD200
1
KTC4075E
EQBN0007601
2
3
Q200
20
R210
LD201
LEWWS47PAZ
EDLH0013403
D200
DNI_VARISTER_1005
VBAT
KEY_BL_EN