LG KS20 Operating Instructions Manual page 60

3. TECHNICAL BRIEF
3.11.6. LED(KEY/Indicator) Light
There are 4 White LEDs in Main key backlight circuit, which are driven by KPD_DR_N line from
PM7540.
[Figure1.26] Schematic of Power Keypad back light circuit
In addition, there is 1 RGB LED in LED Notification-RGB backlight circuit, which are driven by
KEBY_BACKLIGHT line from MSM7200 GPIO78/84/85.
LGE Internal Use Only
Power Keypad LED
100ohm R100
VPWR
100ohm R101
100ohm R102
100ohm R103
LED Notification-RGB
LEMC-S11G
BLUE
LEDCB1
RED
LEDCR1
GREEN
LEDCG1
[Figure1.27] Schematic of KEY back light circuit
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LD101
SSC-TWH104-HLS
LD102
KPD_DRV_N
SSC-TWH104-HLS
LD103
SSC-TWH104-HLS
LD104
SSC-TWH104-HLS
D107
PRSB6.8C
VPWR
LD100
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