LG GU280 Service Manual page 114

7. CIRCUIT DIAGRAM
16 15
L
CHARGE PUMP & DUAL LDO
K
J
+VPWR|WLED_PWR
+VPWR
C103
1u
I
H
G
F
KEY_ROW[4]
E
KEY_ROW[0]
KEY_ROW[1]
D KEY_ROW[2]
KEY_ROW[3]
KEY_COL[3]
KEY_COL[4]
C
VA108
EVLC14S02050
VA103
EVLC14S02050
B
A
16 15
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
14 13 12 11 10
<GU280_KEY_REV.1.0>
WLED_PWR
C104 1u C105 1u
7 16
I2C_SCL_BL
SCL LED4
8 17
I2C_SDA_BL SDA LED3 WLED_3
18
LED2 WLED_2
U101
6 19
PVIN LED1 WLED_1
RT9367C 20
VOUT
13
AVIN
9 10
LCD_LDO_EN ENA NC1
15
NC2
C102
1u
C106 C107
1u
1u
19-217UTD_S887-2_TR8
19-217UTD_S887-2_TR8
19-217UTD_S887-2_TR8
19-217UTD_S887-2_TR8
SUB_BACKLIGHT
KEY MAP
M : MENU
N : NAVIGATION
KB111
M_UP_LEFT KB110 M_UP_RIGHT END KEY
KEYPAD_BUTTON
KEYPAD_BUTTON KB101
KEYPAD_BUTTON
KPDPWR_N
M_M_LEFT
KB102 KB104 M_MIDDLE_RIGHT VA106
KEYPAD_BUTTON KEYPAD_BUTTON
EVLC14S02050
N_CENTER
KB108 KB109 M_DOWN_LEFT
KEYPAD_BUTTON KEYPAD_BUTTON
N_LEFT N_RIGHT
KB105 KB107
KEYPAD_BUTTON KEYPAD_BUTTON
KB103 N_UP KB106 N_DOWN
KEYPAD_BUTTON KEYPAD_BUTTON
BACKUP BAT.(SUPER CAP.)
VA107 VA102 VA105
VA101 VA104
EVLC14S02050 EVLC14S02050
VBACK_UP
EVLC14S02050
EVLC14S02050
EVLC14S02050
14 13 12 11 10
9 8 7 6
LCD ZIP CON.(35 PINS)
Pin number is reversed(1 => 35) in REV.A
KEY LED
LD101
LD102
RA101
1 2
3 4
LD103 5 6
7 8
10
LD104
VA109
EVLC14S02050
KEY BAOARD CON.(50 PINS)
LCD_MAKER_ID
EBI2_DATA[15]
EBI2_DATA[14]
EBI2_DATA[13]
EBI2_DATA[12]
EBI2_DATA[11]
EBI2_DATA[10]
EBI2_DATA[9]
EBI2_DATA[8]
LCD_IF[1]
EBI2_OE_N
LCD_RST
+VPWR
SUB_BACKLIGHT
KPDPWR_N
LCD_LDO_EN
VBACK_UP
I2C_SCL_BL
I2C_SDA_BL
M101
R102
4.7K
311HR-VG1
C108 2.2u
9 8 7 6
- 115 -
5 4 3 2 1
LCD_LDO_1.8V
CN102
04-6293-035-000-829
WLED_PWR
WLED_1 35
WLED_2 34
WLED_3
33
32
LCD_IF[2] 31
30
LCD_IF[1] 29
LCD_VSYNC
28
EBI2_OE_N 27
EBI2_WE_N 26
LCD_ADS 25
LCD_RST 24
LCD_CS_N
23
22
EBI2_DATA[15] 21
EBI2_DATA[14] 20
EBI2_DATA[13] 19
EBI2_DATA[12] 18
EBI2_DATA[11]
17
EBI2_DATA[10] 16
EBI2_DATA[9] 15
EBI2_DATA[8] 14
EBI2_DATA[7] 13
EBI2_DATA[6]
12
EBI2_DATA[5] 11
EBI2_DATA[4] 10
EBI2_DATA[3] 9
EBI2_DATA[2] 8
EBI2_DATA[1]
7
EBI2_DATA[0] 6
LCD_MAKER_ID 5
LCD_LDO_1.8V 4
LCD_LDO_2.8V 3
2
1
VA110
EVLC14S02050
CN101
1 50
2 49
EBI2_DATA[7]
3 48
EBI2_DATA[6]
4 47
EBI2_DATA[5]
5 46
EBI2_DATA[4]
6 45
7 44
LCD_VSYNC
8 43
LCD_ADS
9 42
LCD_CS_N
10 41
11 40
EBI2_WE_N
12 39
KEY_ROW[0]
13 38
KEY_ROW[1]
14 37
KEY_ROW[2]
15 36
16 35
KEY_COL[3]
17 34 KEY_COL[4]
18 33 LCD_IF[2]
19 32 EBI2_DATA[3]
20 31
EBI2_DATA[2]
21 30
EBI2_DATA[1]
22 29
EBI2_DATA[0]
23 28 KEY_ROW[3]
24 27 KEY_ROW[4]
25 26
GB042-50S-H10-E3000
5 4 3 2 1
L
K
J
I
H
G
F
E
D
C
B
A
LGE Internal Use Only