Only For Training And Service Purposes - LG GT810h Service Manual

3. TECHNICAL BRIEF
3.14.3 LCD backlight LED Driver / Auto Luminous Control
U502(in Main PCB) is a Sub PMIC(LCD Backlight LED Driver, Charge pump DCDC and Auto
Luminous Control). This part is controlled by I2C of MSM7201A.
VREG_MSMP_2.6V
VREG_MSMP_2.6V
C512
LCD_BL_EN
BL_I2C_SDA
1u
BL_I2C_SCL
LGE Internal Use Only
+VPWR
B5
VBATCP
F4
VBAT1
E1
C503 VBATLDO
4.7u
A5
C3P
A4
C3N
C504 1u
B6
C2P
C6
C2N
C506 1u U502
C5
C1P
D6
C1N
BD6095GUL
C509 1u
E6
VIO
TP501 C4
RESETB
D4
SDA
D5
SCL
A3
CPGND
E5
SGND
B3
LEDGND
Figure. Schematic of Sub PMIC
B4
VOUT
D2
LED1 WLED1
C2
LED2 WLED2
C1
LED3 WLED3
B1
LED4 WLED4
B2
LED5 WLED5
A2
LEDFL
F5
SBIAS
F3
SSENS
E4
GC1
E3
GC2
F2
LDO1O
E2
LDO2O
D1
WPWMIN
D3
FLASHCNT
Copyright © 2009 LG Electronics. Inc. All right reserved.
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WLED_PWR
C505
2.2u
luminance Sensor
EUSY0343701
NC2
7
NC1 VCC
4 3
GC1 GND
5 2
GC2 IOUT
6 1
U501 BH1600FVC
R509
120K

Only for training and service purposes