LG GS290 - LCD Display Trouble

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Only for training and service purposes
4. TROUBLE SHOOTING
GS290 Operational Description Revision B
LG Electronics 69/136 LGE Property
4.4 LCD display trouble
Check Points
-LCD assembly status ( LCD FPCB, Connector on FPCB)
-EMI filter soldering
-Connector combination
Charge Pump
Check signal flow via EMI filter
Check the connection LCD FPCB
Connector
ICVE10184E150R101FR FL400
01
5
64
73
82
91
INOUT_A1 INOUT_B1
INOUT_A2 INOUT_B2
INOUT_A3 INOUT_B3
INOUT_A4 INOUT_B4
1
G
2
G
TP400
R400
DNI
ICVE10184E150R101FR FL401
01 5
6 4
7 3
8 2
9 1
INOUT_A1INOUT_B1
INOUT_A2INOUT_B2
INOUT_A3INOUT_B3
INOUT_A4INOUT_B4
1G 2G
VA402
EVLC14S02050
TP408
TP409
TP410
VFM_2V9
ICVE10184E150R101FR FL402
0
1
5
6 4
7 3
8 2
9 1
INOUT_A1INOUT_B1
INOUT_A2INOUT_B2
INOUT_A3INOUT_B3
INOUT_A4INOUT_B4
1G 2
G
TP411
TP412
C420
1u
TP413
VFM_2V9
CN402
GB042-40S-H10-E3000
21 20
22 19
23 18
24 17
25 16
26 15
27 14
28 13
29 12
30 11
31 10
32 9
33 8
34 7
35 6
36 5
37 4
38 3
39 2
40 1
TP414
IF_MODE
LCD_ID
DIF_VSYNC
DIF_WR
DIF_RESET
DIF_D7
DIF_D6
DIF_D5
DIF_D4
DIF_D3
DIF_D2
DIF_D1
DIF_D0
DIF_CS
DIF_CD
DIF_RD
MLED
MLED5
MLED4
MLED3
MLED2
MLED1
LCD Connector
L
H
Maker ID
H
L
IF
Pin11 : IF_MODE(IF1)
Pin18 : OPEN(OTP)
SHARP
LGIT
Maker
LCD Interface Mode
Pin19 : IF_MODE(IF0)
Pin2 : LCD_VSYNC_I
Pin3 : MAKER_ID