Lcd Display Trouble - LG GM360i 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
TP406
DIF_D0
INOUT_A4 INOUT_B4
4
DIF_D1
INOUT_A3 INOUT_B3
3
DIF_D2
INOUT_A2 INOUT_B2
2
DIF_D3
INOUT_A1 INOUT_B1
1
15pF
FL403
DIF_D4
INOUT_A4 INOUT_B4
4
DIF_D5
INOUT_A3 INOUT_B3
3
DIF_D6
INOUT_A2 INOUT_B2
2
DIF_D7
INOUT_A1 INOUT_B1
1
FL405 15pF
LG Electronics
LGE Internal Use Only
VFM_2V9
6
7
8
9
6
7
8
9
C418
1uF
Pin2 : LCD_VSYNC_I
Pin3 : MAKER_ID
Pin11 : IF_MODE(IF1)
Pin18 : OPEN(OTP)
Pin19 : IF_MODE(IF0)
Check signal flow via EMI
filter(FL404,405,403)
71/147
VFM_2V9
MLED
CN402
40 1
R409 DNI
39 2
38 3
LCD_ID
TP400
37 4
36 5
MLED1
35 6
MLED2
34 7
MLED3
33 8
MLED4
32 9
MLED5
31 10
30 11
IF_MODE
29 12
28 13
27 14
DIF_RESET
26 15
25 16
TP407
24 17
DIF_VSYNC
23 18
22 19 TP404
21 20
VA407
Check the connection LCD FPCB
Connector
Charge Pump
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Copyright © 2010 LG Electronics. Inc. All right reserved.
C403
1u
TP405
INOUT_B4 INOUT_A4
TP403
6 4
INOUT_B3 INOUT_A3
TP402
7 3
INOUT_B2 INOUT_A2
TP401
8 2
INOUT_B1 INOUT_A1
9 1
15pF
FL404
LCD Interface Mode
Maker IF Maker ID
SHARP H L
LGIT L H
LGE Property
Only for training and service purposes
DIF_CD
DIF_CS
DIF_RD
DIF_WR