LG KS360 - LCD Display Trouble

LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. Trouble shooting
- 72 -
5.4 LCD display trouble
Check Points
-LCD assembly status ( LCD FPCB, Connector on FPCB)
-EMI filter soldering
-Connector combination
Check the connection LCD FPCB connector
Check signal flow via EMI filter
The LCD backlight enable signal
(SUB PCB)
Socket
MAIN To FPCB Connector
ICVE10054E250R201FRFL402
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
VBAT
3
4
INOUT_A4
9
INOUT_B1
INOUT_B2
8
7
INOUT_B3
INOUT_B4
6
FL404 ICVE10054E250R201FR
G1
5
G2
10
INOUT_A1
1
2
INOUT_A2
INOUT_A3
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
FL403 ICVE10184E150R101FR
C41227p C40827p C41027p C41127p C40627p
27p C409 27p C407
2V62_VIO
6
FL400 ICVE10054E250R201FR
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
C40527p
ICVE10054E250R201FRFL401
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
2V8_VVIB
27
28
29
30
31
32
33
34
35
36
37
38
39
22
40
23
24
25
26
14
15
16
17
18
19
2
20
3
4
5
6
7
8
9
21
CN400
1
10
11
12
13
KEY_COL7
KEY_COL6
KEY_COL5
KEY_ROW6
KEY_ROW5
KEY_ROW4
SUB_KEY_BL
KEY_COL4
END_KEY
RCV_P
RCV_N
DIF_WR
DIF_RD
DIF_D(7)
DIF_D(6)
DIF_D(5)
DIF_D(4)
DIF_VSYNC
DIF_RESET
LCD_ID
IF_MODE3
TOUCH_SCL
DBB_BL_PWM
TOUCH_SDA
TOUCH_INT DIF_D(3)
DIF_D(2)
DIF_D(1)
DIF_D(0)
DIF_CS
DIF_CD