LG KF700Q Service Manual page 102

C104( TOUCH_PENIRO_N)
C102( VREG_LDO_TOUCH_2. 8V)
U508
1
TOUCH_LDO_EN STBY
2
GND
3
+VPWR VIN
C526
470n
C102(V REG_LDO_TOUCH_2.8V)
VREG_LDO_TOUCH_2.8V
C102 C103
1u 0.1u
U100
A1
AUX
A2
VDD_REF
A3
X+
B1
TOUCH_PENIRQ_N PENIRQ-
B2
A0
B3
Y+
X+
Y+
X-
Y-
C104
0.1u
C104(TOUCH_PENIRO_N)
TOUCH SCREEN DRIVER IC
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
VREG_LDO_TOUCH_2.8V
BH28PB1WHFV
5
SEL
6
BGND
4
VOUT
C527
470n
TSC2007IYZGR
C1
SDA TOUCH_I2C_SDA Rev.1.0
C2
A1
C3
X-
D1
SCL TOUCH_I2C_SCL
D2
TOUCH_I2C_SDA
GND
D3
Y- TOUCH_PENIRQ_N
[Fig. 4.12] Schematic of TOUCH part
- 103 -
4. TROUBLE SHOOTING
R301( TOUCH_I2C_SDA)
R302( TOUCH_I2C_SCA)
R301( TOUCH_I2C_SDA) &
R302( TOUCH_I2C_SCA)
CN301
G1
1
2
3
LCD_DATA(15)
4
LCD_DATA(14)
5
LCD_DATA(13)
6
LCD_DATA(12)
7
LCD_DATA(11)
8
LCD_DATA(10)
9
LCD_DATA(9)
10
LCD_DATA(8)
11
LCD_DATA(7)
12
LCD_DATA(6)
13
LCD_DATA(5)
14
LCD_DATA(4)
15
LCD_DATA(3)
16
LCD_DATA(2)
17
LCD_DATA(1)
18
LCD_DATA(0)
19
LCD_IF_MODE
20
EBI2_ADDR(11)
21
LCD_CS_N
22
LCD_RESET_N
23
EBI2_OE_N
24
EBI2_WE_N
25
LCD_VSYNC_OUT
R306 51 26
VGA_CAM_PWDN
27
LCD_MAKER_ID
28
29
TOUCH_I2C_SCL
30
31
32
G3
MAIN PCB TO LCD FPCB
G2
64
CAM_VSYNC
63
CAM_HSYNC
62
CAM_DATA(7)
61
CAM_DATA(6)
60
CAM_DATA(5)
59
CAM_DATA(4)
58
CAM_DATA(3)
57
CAM_DATA(2)
56
CAM_DATA(1)
55
CAM_DATA(0)
54
53
CAM_PCLK
52
51
CAM_MCLK
50
VGA_CAM_RESET_N
49
I2C_SCL
48
I2C_SDA
47
46
45
WLED_PWR
44
MLED1
43
MLED2
42
MLED3
41
MLED4
40
MLED5
39
MLED6
38
37
MOTOR+
36
MOTOR-
35
34
SPK_RCV+
33
SPK_RCV-
G4
LGE Internal Use Only