Lcd Display Trouble - LG KF350 Service Manual

4. TROUBLE SHOOTING

4.4 LCD display trouble

Check Points
-LCD assembly status ( LCD FPCB, Connector on FPCB)
-EMI filter soldering
-Connector combination
MAIN TO LCD CONNECTOR
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
FL302
ICVE10184E150R101FR
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
FL304
ICVE10184E150R101FR
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
LGE Internal Use Only
2V9_VFM
2V11_RTC VBAT
CN30
1
2
3
4
5
6
LED_CNT
7
_LED_RESET
8
VIB_EN
9
10
AUDIO_IN
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
DIF_VSYNC
28
LCD_ID
29
_DIF_RESET
30
C317 C318 GB042-60S-
VA309
ICVN0505X150FR 1u 1u
VA310
ICVN0505X150FR
Check signal flow via EMI
filter
- 70 -
LCD CONNECTOR
2V9_VFM
LCD_ID
DIF_D0
DIF_D1
DIF_D2
DIF_D3
DIF_D4
DIF_D5
DIF_D6
DIF_D7
_DIF_RESET
_DIF_WR
DIF_RD
DIF_MAIN_CS
DIF_CD
DIF_VSYNC
MLED5
MLED4
MLED3
MLED2
MLED1
MLED
C119
1u
Check the connection LCD FPCB
Connector
Charge Pump
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2V9_VFM
CN104
1
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
32
33
34
35
GF032-35S-E2000