LG KT520 Service Manual page 183

7. CIRCUIT DIAGRAM
1 2 3
A
PDI_D0
PDI_D1
PDI_D2
PDI_D3
PDI_D4
PDI_D5
PDI_D6
PDI_D7
LCD_RD
LCD_VSYNC
LCD_RES_n
LCD_WR
B LCD_RS_n
LCD_CS_n
APP_GP10_BL_CTRL
APP_GP15_CAM_LDO_CTRL
R134
ESD9X5.0ST5G
NA
40 pin OJ key Connector
C
VDDE_1V8
B1
D APP_GP04_OJ_MISO
A1
APP_GP05_OJ_MOSI
B2
APP_GP06_OJ_SCLK
A2
APP_GP07_OJ_MOTION_n
B3
APP_GP11_OJ_CS_n
A5
B4
B5
E
Optical Joystick Level Shifter
F
SOFT100
LEFT
G
CALL
H
1 2 3
LGE Internal Use Only
4 5 6
CN100
G1 G2
1 40
2 39
3 38
4 37
5 36
ACC_GP12_KEY_LED_ON
6 35
APP_GP11_OJ_CS_n
7 34
APP_GP07_OJ_MOTION_n
8 33
APP_GP04_OJ_MISO
9 32
APP_GP05_OJ_MOSI
10 31
APP_GP06_OJ_SCLK
11 30
12 29
KEYIN3
13 28
KEYIN4
14 27
KEYIN5
15 26
KEYOUT1
16 25
KEYOUT2
17 24
KEYOUT3
18 23
KEYOUT4
19 22
ONSWA_n
20 21
G3 G4
AXK7L40227G (0.9T Socket)
LCD_VSYNC
VDD_BACKLIGHT
VDDG_2V75
IC? NLSX3013
C1
I_OVL1 I_OVCC1 APP_GP04_OJ_MISO_2V75
D1
I_OVL2 I_OVCC2 APP_GP05_OJ_MOSI_2V75
C2
I_OVL3 I_OVCC3 APP_GP06_OJ_SCLK_2V75
D2
I_OVL4 I_OVCC4 APP_GP07_OJ_MOTION_n_2V75
C3
I_OVL5 I_OVCC5 APP_GP11_OJ_CS_n_2V75
D5
I_OVL6 I_OVCC6
C4
I_OVL7 I_OVCC7
APP_GP11_OJ_CS_n_2V75
C5
I_OVL8 I_OVCC8 APP_GP04_OJ_MISO_2V75
APP_GP05_OJ_MOSI_2V75
APP_GP06_OJ_SCLK_2V75
R109
10K
UP SOFT101
KEYOUT1
ACC_GP12_KEY_LED_ON
RIGHT
KEYOUT2
HOT DOWN CANCEL
KEYOUT3
END
ONSWA_n
KEYOUT4
OJ KEY PAD
4 5 6
7 8 9
VDDE_1V8 VDDG_2V75
CN101
1
2
3
4
TP100 5
6
7
8
9
10
11
12
13
PDI_D0 14
PDI_D1 15
PDI_D2 16
PDI_D3 17
PDI_D4 18
PDI_D5 19 APP_GP10_BL_CTRL
PDI_D6 20
PDI_D7 21
22 APP_GP15_CAM_LDO_CTRL
LCD_RES_n 23
LCD_WR 24
LCD_RD 25
LCD_CS_n 26
ESD9X5.0ST5G
LCD_RS_n 27
R100 INSTPAR
28
10K ZD101
29
30
LCD_BL5 31
LCD_BL4 32
LCD_BL3 33
LCD_BL2 34
LCD_BL1 35
ESD9X5.0ST5G
INSTPAR
ZD102
LCD_Connector(35pin)
04-6293-035-000-829
VDDG_2V75
CN102
G1 G2
1 10
2 9 R118 100K
3 8
APP_GP07_OJ_MOTION_n_2V75
4 7
KEYIN4
5 6
KEYOUT2
G3 G4
ZD103
ZD104 ZD100
ESD9X5.0ST5G ESD9X5.0ST5G ESD9X5.0ST5G
INSTPAR INSTPAR INSTPAR
10pin Optical Joystick Connector
AXK7L10227G (0.9T socket)
VBAT
R120
2.2K
R129
27
Q100
1 2 3
EMX18
R131
27
6 5 4
UPPER KEY LED
7 8 9
- 184 -
10 11 12
VBAT
U100 MAX8631XETI
1 23
PIN C1P
2
IN C100
C101 1u
22
10u C1N
3 26
GND C2P
24
PGND C102
29
BGND 1u
27
C2N
25
OUT VDD_BACKLIGHT
20
ENM1
19
ENM2
21 16
ENF M1 LCD_BL1
18 15
ENLDO M2 LCD_BL3
28 14
P1 M3 LCD_BL5
17 13
P2 M4
12
F1 LCD_BL2
11
F2 LCD_BL4
8 10
SETM F3
9
F4
7
SETF
4
LDO1 VDD_CAM_2V8
6 5
REFBP LDO2 VDD_CAM_1V8
C103 C104 C105 C106
0.01u 1u 1u 10u
BACKLIGHT CHARGE PUMP
C107
0.1u
G
10 11 12
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
A
B
C
D
E
F
H