Lcd Display Trouble - LG GX500 Service Manual

4. TROUBLE SHOOTING
GX500 Operational Description

4.4 LCD display trouble

Check Points
-LCD assembly status ( LCD FPCB, Connector on FPCB)
-EMI filter soldering
-Connector combination
LCD CONNECTOR
EVRC14S03Q030100R
9
DIF_D0 INOUT_B1
8
DIF_D1
INOUT_B2
7
DIF_D2
INOUT_B3
6
DIF_D3
INOUT_B4
DIF_D4
INOUT_A4
4
DIF_D5
INOUT_A3
3
DIF_D6
INOUT_A2
2
DIF_D7
INOUT_A1
1
FL805
Figure 4-9. LCD Connector circuit
Figure 4-10. LCD FPCB Connector
Figure 4-11. Charge Pump
LGE Internal Use Only
LG Electronics
2V85_VFM
FL803
1
INOUT_A1
2
INOUT_A2
3
INOUT_A3
4
INOUT_A4
INOUT_B4
6
INOUT_B3
7
INOUT_B2
8
C817
INOUT_B1
9
1U
EVRC14S03Q030100R
Check signal flow via EMI filter
80/143
CN804
40 1 R817 DNI
39 2
LCD_PWM
38 3
LCD_ID
37 4
MLED
36 5
MLED1
35 6
MLED2
34 7
MLED3
33 8
MLED4
32 9
MLED5
31 10
MLED6
30 11
IF_MODE1
29 12
28 13
27 14
DIF_RESET
26 15
25 16
24 17
DIF_VSYNC
23 18
TP801
22 19
IF_MODE0
21 20
VA804
EVLC14S02050
ENBY0036001
GB042-40S-H10-E3000
Check the connection LCD FPCB Connector
Charge Pump
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Copyright © 2010 LG Electronics. Inc. All right reserved.
Revision A
EVRC14S03Q030100R
1 9
DIF_CD
INOUT_A1 INOUT_B1
2 8
DIF_CS
INOUT_A2 INOUT_B2
3 7
DIF_RD
INOUT_A3 INOUT_B3
4 6
DIF_WR
INOUT_A4 INOUT_B4
FL804
Only for training and service purposes
LGE Property