3.12.5 LED(KEY/Indicator) Light
There are 2 White LEDs in Main key backlight circuit, which are driven by KPD_DR_N line from
PM7540.
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
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 52 -
Figure. Schematic of Power Keypad back light circuit
KEY BACKLIGHT LEDs(White LED)
Rev 1.0
SSC-TWH104-HLS
LD601
+VPWR
ZD602
PRSB6.8C
100ohm
R614
R613
100ohm
LD602 SSC-TWH104-HLS
KPD_DRV_N
Figure. Schematic of KEY back light circuit
LED Notification-RGB
D
G
S
KTK5132E
Q601
R617
100K
R616
100K
R611
10K
D
G
S
KTK5132E
Q603
6.8K
R610
R612
1.5K
G
S
Q602
KTK5132E
D
LEMC-S11G
1
2
3
4
LD603
+VPWR
100K
R615
LEDR
LEDG
LEDB
Summary of Contents for CT815
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