LG KG190 Service Manual page 46

LCD and KEYPAD
C309
C304
100n
2.2u (0603)
B301 GND
1 2 7
VBATBB VIN
0R(0603 1/10W)
1
GPIO3_LCM_BL_EN
EN
2 CTRL0
3 CTRL1
LCM_BL_PWM
5 ISET
4 AGND
LCM_D0
LCM_D1
LCM_D2
LCM_D3
LCM_D4
LCM_D5
LCM_D6
LCM_D7
LRSTB
LCM_CS
LCM_A0
VDD
LCM_RD
LCM_WE R304
0R
R305
ADC5_LCM_ID
0R
C303
R306
1u (0603)
GPIO3_LCM_BL_EN
n.m(0R)
GND
4.7u (0603) 4.7u (0603)
C301
C302
C1P
C1N C2P C2N B302
6
1 2
VOUT
0R(0603 1/10W)
U302
RT9362
16
LED1
15
LED2
14
LED3
13
LED4
GND
GND
GND
GND
LKC34TMH1YT
26
NC
25
VSS
24
LED2-
23
LED1-
22
LED+
21
LED+
20
VSS
19
D0
18
D1
17
D2
16
D3
15
D4
14
D5
13
D6
12
D7
11
/RST
10
/CS
9
RS
8
/RD
7
/WR
6
VSS
5
VDD2
4
VDD
3
ID
2
VSS
1
NC
U301
GND
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2
1
3 5
4 6
6 4
5 3
GND
T303
2
1
GND
GND
GND
6 4
5 3
2
KBR1 1
T304
ESD367
GND
KBC0 KBC1 KBC2
KBR0
S302
1 2
ESD303
KBR1
S303 S304
ESD316
2 1 2
ESD315
KBR2
ESD321
S310 S307
1 2 1 2
ESD324
ESD323
KBR3
S314 S311
1 2
2 1
ESD332
ESD333
KBR4
S315 S316
1 2
2 1
ESD342
ESD343
KBC2
KBR0
KBC3
T301
T302
GND
GND
GND
GND GND
GND
KBC4
KBC3 KBC4
S305 S306
ESD317
2
1 2 1
1
ESD318
S308 S309
1 2 1 2
ESD325
ESD326
S312 S313 S301
1 2 1 2
2 1
ESD334 ESD335
ESD336
S317 S318 S319
1 2 1 2 1 2
ESD344
ESD345 ESD346
GND