5. Trouble shooting
5.4 LCD display trouble
Check Points
MAIN To FPCB Connector
END_KEY
SUB_KEY_BL
KEY_ROW4
KEY_ROW5
KEY_ROW6
KEY_COL4
KEY_COL5
KEY_COL6
KEY_COL7
TOUCH_SCL
TOUCH_SDA
TOUCH_INT
DBB_BL_PWM
RCV_P
RCV_N
27p C405
27p C406
27p C407
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| C408 |
| C409 |
| C410 |
| C411 |
| C412 |
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| 27p |
| 27p |
| 27p |
| 27p |
| 27p |
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FL403 ICVE10184E150R101FR
19
INOUT_A1 INOUT_B1
28
INOUT_A2 INOUT_B2
37
INOUT_A3 INOUT_B3
46
INOUT_A4 INOUT_B4
G1 | G2 |
5 | 10 |
VBAT | 2V62_VIO 2V8_VVIB |
CN400
140
239
338
437
536
635
734
833
932
1031
1130
1229
1328
1427
1526
1625
1724
1823
1922
2021
Socket
FL400 ICVE10054E250R201FR
19
INOUT_A1 | INOUT_B1 | 8 |
| IF_MODE3 |
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2 | INOUT_B2 |
| LCD_ID | |
INOUT_A2 | 7 |
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3 | INOUT_B3 |
| DIF_RESET | |
INOUT_A3 | 6 |
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4 | INOUT_B4 |
| DIF_VSYNC | |
INOUT_A4 |
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G1 | G2 |
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5 | 10 |
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FL401 ICVE10054E250R201FR
19
INOUT_A1 | INOUT_B1 | 8 |
| DIF_RD |
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2 | INOUT_B2 |
| DIF_WR | |
INOUT_A2 | 7 |
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3 | INOUT_B3 |
| DIF_CD | |
INOUT_A3 | 6 |
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4 | INOUT_B4 |
| DIF_CS | |
INOUT_A4 |
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G1 | G2 |
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5 | 10 |
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FL402 ICVE10054E250R201FR
19
INOUT_A1 | INOUT_B1 | 8 |
| DIF_D(0) |
2 | INOUT_B2 |
| DIF_D(1) | |
INOUT_A2 | 7 |
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3 | INOUT_B3 |
| DIF_D(2) | |
INOUT_A3 | 6 |
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4 | INOUT_B4 |
| DIF_D(3) | |
INOUT_A4 |
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G1 | G2 |
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5 | 10 |
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FL404 ICVE10054E250R201FR
19
INOUT_A1 | INOUT_B1 | 8 |
| DIF_D(4) |
2 | INOUT_B2 |
| DIF_D(5) | |
INOUT_A2 | 7 |
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3 | INOUT_B3 |
| DIF_D(6) | |
INOUT_A3 | 6 |
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4 | INOUT_B4 |
| DIF_D(7) | |
INOUT_A4 |
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G1 | G2 |
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5 | 10 |
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Check the connection LCD FPCB connector
Check signal flow via EMI filter
The LCD backlight enable signal (SUB PCB)
LGE Internal Use Only | - 72 - | Copyright © 2008 LG Electronics. Inc. All right reserved. |
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| Only for training and service purposes |
