Only For Training And Service Purposes - LG GM730 Service Manual

3.15.3 LCD backlight LED Driver / Auto Luminous Control
U103(in Sub PCB) is a Sub PMIC(LCD Backlight LED Driver, Charge pump DCDC and Auto Luminous Control).
This part is controlled by I2C of MSM7200A.
VREG_MSMP_2.6V
C124
1u
LCD_BL_EN
BL_I2C_SCL
BL_I2C_SDA
BH1600FVC U104
1
IOUT GC2
2
GND GC1
3
VCC NC1
NC2
Luminance Sensor
EUSY0343701
Copyright © 2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

+VPWR
C122
4.7u
B6
VBATCP
F4
VBAT1
F5
VBAT2
D5
VIO
B4
RESETB
C4
SCL
D4
SDA
B3
WPWMIN
R?
F3
100K
SBIAS
E1
SSENS
F2
SGND
D3
GC2
E2
GC1
6
5
4
7
C131 R118
1%
1u 30K
Figure. Schematic of Sub PMIC
1
10V 10V
2
3
D6
VOUT
A2
LED1
B1
LED2
B2
LED3
C2
LED4
U103
D1
LED5
D2
LED6
BD6083GUL
VGA_DVDD_1.8V
C1
LEDGND
E6
LDO1O
E5
LDO2O
E4
LDO3O
E3
LDO4O
C132
- 65 -
3. TECHNICAL BRIEF
Add ESD protrction Diode
REV D
D206
6
5
4
VSMF05LCC
WLED1 C123
WLED2 2.2u
WLED3
WLED4
WLED5
PM_CAM_AF_2.8V
CAM_DVDD_1.8V
VGA_AVDD_2.8V
VGA_IOVDD_2.8V
FB106
C134
C133 C135
1u
1u 1u 1u
LGE Internal Use Only
WLED_PWR
Delete C136
REV C