LG PRADA KE850 - LCD Display Trouble

5. Trouble shooting
- 81 -
5.4 LCD display trouble
Check Points
-LCD assembly status ( LCD FPCB, Connector on Sub PCB)
-EMI filter soldering
-Connector combination
IM3
IM0
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
FL105ICVE10184E150R101FR
1u
C137
3
4
INOUT_A4
9
INOUT_B1
INOUT_B2
8
7
INOUT_B3
INOUT_B4
6
FL101ICVE10184E150R101FR
G1
5
G2
10
INOUT_A1
1
2
INOUT_A2
INOUT_A3
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
ICVE10184E150R101FR FL104
NAR133
EVL5M02200
VA106
2V85_IO
8
9
28
29
3
30
31
32
33
34
35
4
5
6
7
12
13
14
15
16
17
18
19
2
20
21
22
23
24
25
26
27
CN103
1
10
11
0R134
R135 0
R129
0
0.1u
C138
VA105
INOUT_B1
INOUT_B2
8
7
INOUT_B3
INOUT_B4
6
FL103ICVE10184E150R101FR
G1
5
G2
10
INOUT_A1
1
2
INOUT_A2
INOUT_A3
3
4
INOUT_A4
9
INOUT_A1
INOUT_A2
2
3
INOUT_A3
INOUT_A4
4
INOUT_B1
9
8
INOUT_B2
INOUT_B3
7
6
INOUT_B4
ICVE10184E150R101FR FL102
5
G1
10
G2
1
R132 NA
DIF_RESET
DIF_VSYNC
MLED
MLED4
MLED3
MLED2
MLED1
LCD_ID
DIF_CS1
DIF_ADS
DIF_WR
DIF_RD
DIF_D7
DIF_D8
DIF_D9
DIF_D10
DIF_D11
DIF_D12
DIF_D13
DIF_D14
DIF_D15
DIF_D0
DIF_D2
DIF_D1
DIF_D3
DIF_D4
DIF_D5
DIF_D6
At first check the LCD
back light enable signal
Check signal flow via EMI
filter
Check the connection LCD FPCB
to SUB PCB