LG KG920 - Lcd Interface

(GPIO_23)
CHARGE PUMP
C408
1u
FB403
FB404
1K
R414
1u
C407
C412
27p
C410
1u
FB402
ISINK3
12
1
ISINK4
5
OUTCP
13
PGND
3
C1+
C1-
4
6
C2+
C2-
7
2
EN_SET
GND
9
8
IN
ISINK1
10
11
ISINK2
R415
U405 AAT3152IWP
10K
C409
1u
VBAT
FB405
VMLED
VMLED
MLED1
MLED2
MLED3
LCD_BACKLIGHT
Figure 4-54.
Figure 4-55.
4. TROUBLE SHOOTING
- 106 -
CIRCUIT
LCD INTERFACE
(100ohm,7.5pF)
(100ohm,7.5pF)
(100ohm,7.5pF)
LCD_IFMODE
LCD_RD
(GPIO_15)
(100ohm,7.5pF)
(100ohm,7.5pF)
C406
FB401
0.1u
R413 100K
C405
1u
9
8
INOUT_B2
INOUT_B3
7
6
INOUT_B4
ICVE10184E070R101FR
FL404
5
G1
10
G2
1
INOUT_A1
2
INOUT_A2
3
INOUT_A3
INOUT_A4
4
INOUT_B1
6
2V8_MM
100K
R418
FL403
ICVE10184E070R101FR
G1
5
G2
10
INOUT_A1
1
2
INOUT_A2
INOUT_A3
3
4
INOUT_A4
9
INOUT_B1
INOUT_B2
8
7
INOUT_B3
INOUT_B4
100
R417
2V8_MM
INOUT_B4
ICVE10184E070R101FR
FL400
5
G1
10
G2
1
INOUT_A1
2
INOUT_A2
3
INOUT_A3
INOUT_A4
4
INOUT_B1
9
8
INOUT_B2
INOUT_B3
7
6
100K R419
0.1u
C411
5
G1
10
G2
1
INOUT_A1
INOUT_A2
2
3
INOUT_A3
INOUT_A4
4
INOUT_B1
9
8
INOUT_B2
INOUT_B3
7
6
INOUT_B4
5
6
7
8
9
ICVE10184E070R101FR
FL401
23
24
25
26
27
28
29
3
30
31
32
33
34
35
4
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
CN400
FL402
ICVE10184E070R101FR
G1
5
G2
10
INOUT_A1
1
2
INOUT_A2
INOUT_A3
3
4
INOUT_A4
9
INOUT_B1
INOUT_B2
8
7
INOUT_B3
INOUT_B4
6
2V8_MM
R416 47
L_DATA04
L_DATA07
L_DATA06
L_DATA05
L_DATA00
LCD_VSYNC
LCD_RESET
VMLED
MLED2
MLED1
MLED3
LCD_RD
LCD_WR
LCD_RS
LCD_CS
L_DATA15
L_DATA14
L_DATA13
L_DATA12
L_DATA11
L_DATA10
L_DATA09
L_DATA08
L_DATA03
L_DATA02
L_DATA01