Luminance Sensor - LG GT810h Service Manual

3. TECHNICAL BRIEF

3.16 Luminance Sensor

When ALC sensor turn on, automatically controls brightness of the display backlight.
U502 : Backlight driver IC (BD6095) used I2C interface to MSM7201A
U501 : Luminance Sensor
VREG_MSMP_2.6V
C503
VREG_MSMP_2.6V
4.7u
C512
LCD_BL_EN
BL_I2C_SDA
1u
BL_I2C_SCL
MSM7201A
LGE Internal Use Only
+VPWR
B5
VBATCP
F4
VBAT1
E1
VBATLDO
A5
C3P
A4
C3N
C504 1u B6
C2P
C6
C2N
U502
C506 1u C5
C1P
D6
C1N
C509 1u BD6095GUL
E6
VIO
TP501 C4
RESETB
D4
SDA
D5
SCL
A3
CPGND
E5
SGND
B3
LEDGND
Luminance Sensor Schematic
Luminance Sensor Block Diagram
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
U502
U501
Copyright © 2009 LG Electronics. Inc. All right reserved.
- 66 -
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