Lcd Display Trouble - LG KC780 Service Manual

5.4 LCD display trouble

Check Points
- LCD assembly status ( LCD FPCB, Connector on FPCB)
- EMI filter and connector soldering
- Connector combination
B-to-B Socket (SLIDE FPCB), 1.0T, AXT554124
ICVE10184E150R101FR FL303
9 1
DIF_CD INOUT_B1 INOUT_A1
8 2
DIF_CS
INOUT_B2 INOUT_A2
7 3
DIF_WR INOUT_B3 INOUT_A3
6 4
DIF_RD
INOUT_B4 INOUT_A4
Check
connection of
F-LCD
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
VIO_2V62
TP4
ENBY0044701
CN301
G1 G2
1 54
2 53
3 52
4 51
KP_IN(5)
5 50
KP_IN(6)
6 49
KP_OUT(0)
7 48
KP_OUT(1)
8 47
KP_OUT(2)
9 46
KP_OUT(3)
TP3
10 45
KP_OUT(4)
11 44
12 43
TP2
13 42
14 41
TP1
15 40
DIF_VSYNC
16 39
DIF_RESET
17 38
BL_RESETB
18 37
I2C_SDA
19 36
I2C_SCL
20 35
FLASHCNT
21 34
DTX0
22 33
DTX1
23 32
DTX3
24 31
25 30
26 29
27 28
G3 G4
C314
FL303
TP1 TP2 TP3
VBAT VRTC_2V0
UPPER_KEY_BL
LCD_ID
END_KEY
SPK_EAR_N
SPK_EAR_P
C316
1u
TP4
- 77 -
5. TROUBLE SHOOTING
FB301
ICVE10184E150R101FR
DIF_D(0)
INOUT_B4 INOUT_A4
6 4
DIF_D(1)
INOUT_B3 INOUT_A3
7 3
INOUT_B2 INOUT_A2 DIF_D(2)
8 2
INOUT_B1 INOUT_A1 DIF_D(3)
9 1
FB303
ICVE10184E150R101FR
DIF_D(4)
INOUT_B4 INOUT_A4
6 4
INOUT_B3 INOUT_A3 DIF_D(5)
7 3
INOUT_B2 INOUT_A2 DIF_D(6)
8 2
DIF_D(7)
INOUT_B1 INOUT_A1
9 1
FB309
ICVE10184E150R101FR
DIF_D(8)
INOUT_B4 INOUT_A4
6 4
INOUT_B3 INOUT_A3 DIF_D(9)
7 3
INOUT_B2 INOUT_A2 DIF_D(10)
8 2
DIF_D(11)
INOUT_B1 INOUT_A1
9 1
FL304
ICVE10184E150R101FR
INOUT_B4 INOUT_A4 DIF_D(12)
6 4
INOUT_B3 INOUT_A3 DIF_D(13)
7 3
DIF_D(14)
INOUT_B2 INOUT_A2
8 2
DIF_D(15)
INOUT_B1 INOUT_A1
9 1
LGE Internal Use Only