LG GW620 - Page 166

- 167 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
1) Measurement : Main U25 LCD_FPCB U2
-. U2 (SSENS)
-. BL_I2C_SDA / SCL : data / CLK pulse (R97, R98)
TP3 (U2)
TP1 (R98)
TP2 (R97)
TP2 (R97)
TP1 (R98)
TP3
BH1621FVCU2
6
43
2
51
VCC IOUT
GND1
GC1 GC2
2DNG
GAIN2GAIN1
SBIAS SSENS
K01361R
VREG_MOTOR_3.0V
VREG_5M_2.8V
1u
C134
FU131C
1UF
C12
1UF
C11
BD6083GUL
U25
3A
6F 1A 1F
6A
E3
E2
E4D3
E5F2
E6E1
F3
C1
B3
D2D4
D1C4
C2B4
B2D5
B1
A2
F5
F4
D6B6
5A
6
C
5B
5C
4A
N1C
P1C
N2
C
P2C
DNGPC
VBATCP VOUT
VBAT1
VBAT2
LED1
LED2
VIO LED3
RESETB LED4
SCL LED5
SDA LED6
WPWMIN
LEDGND
SBIAS
SSENS LDO1O
SGND LDO2O
GC2 LDO3O
GC1 LDO4O
2
T
4T 1T
3T
1DNG
+VPWR
4.7u
C117
VREG_MSMP_2.7V
1UF
C3
smhoK7.4
79R
smhoK7.4
89R
1UF
C7
1UF
C9
VREG_5M_AVDD_2.8V
4.7u
C116
BL_I2C_SCL
BL_I2C_SDA
WLED1
WLED2
WLED3
WLED4
WLED5
WLED6
WLED_PWR
LCD_BL_EN
GAIN2
GAIN1
SBIAS
SSENS
LCD_PWM
CHARGE PUMP
TP3
TP1 (R98)
TP2 (R97)