Lcd Display Trouble - LG GD310 Service Manual

5.4 LCD display trouble

Check Points
-LCD assembly status ( LCD FPCB, Connector on FPCB)
-EMI filter soldering
-Connector combination
FL302
1 9
DIF_D0
INOUT_A1 INOUT_B1
2 8
DIF_D1 INOUT_A2 INOUT_B2
3 7
DIF_D2
INOUT_A3 INOUT_B3
4 6
DIF_D3 INOUT_A4 INOUT_B4
ICVE10184E150R101FR
FL300
1 9
DIF_D4 INOUT_A1 INOUT_B1
2 8
DIF_D5
INOUT_A2 INOUT_B2
3 7
DIF_D6 INOUT_A3 INOUT_B3
4 6
DIF_D7
INOUT_A4 INOUT_B4
ICVE10184E150R101FR
FL306
_DIF_WR INOUT_B4 INOUT_A4
6 4
DIF_RD
INOUT_B3 INOUT_A3
7 3
DIF_MAIN_CS INOUT_B2 INOUT_A2
8 2
DIF_CD
INOUT_B1 INOUT_A1
9 1
ICVE10184E150R101FR
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
VBAT
2V9_VFM
2V11_RTC
CN301
1
2
3
4
5
6
LED_CNT
7
_LED_RESET
8
VIB_EN
9
10
LED_INT
11
LCD_IF1
12
LCD_IF2
13
14
15
16
17
18
19
20
21
22
LCD_BACKLIGHT_EN
23
24
25
26
27
DIF_VSYNC
28
LCD_ID
29
_DIF_RESET
30
GB042-60S-H10-E300
Check signal flow via EMI
filter
Charge Pump
- 73 -
RENESAS HIMAX
LCD_ID (PIN27) H L
LCD_IF1 (PIN3) H H
LCD_IF2 (PIN4) L H
LCD_IF1
LCD_IF2
DIF_VSYNC
DIF_RD
60
_DIF_WR
59
DIF_CD
58
DIF_MAIN_CS
57
56
55
54
53
52
51
50
49
48
DIF_D7
47
46 DIF_D6
45
DIF_D5
44
DIF_D4
43
DIF_D3
42
DIF_D2
41
DIF_D1
40
DIF_D0
39
LCD_ID
38
37
36
35
_DIF_RESET
34
33
32
31
Check the connection LCD FPCB
Connector
5. TROUBLE SHOOTING
2V9_VFM
CN101
1
TP105
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
MLED5 32
MLED4 33
MLED3 34
MLED2 35
MLED1 36
MLED 37
C105
04-6293-037-001-829
1uF
LGE Internal Use Only