LG KM710 Service Manual - Page 63

LCD Display Trouble shooting

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4. Trouble Shooting 4.5 LCD Display Trouble shooting z LCD Control signals from Main Board - The signal of DBB is ELCD_DATA(16BIT), ELCD_CS/WR/ADS, ELCD_CS, - LCD MODULE POWER SOURCE and LCD reset. - The signal of TCC are composed of LCD_DATA(16BIT) and LCD_CS/WR/ADS ELCD_DATA(15:0) MM_INT FM_RESET LCD_CS MM_RESET ELCD_ADS ELCD_WR ELCD_RD BPEN GATED_IOEN SLCD_RST ELCD_DATA(0) ELCD_DATA(1) ELCD_DATA(2) ELCD_DATA(3) ELCD_DATA(4) ELCD_DATA(5) ELCD_DATA(6) ELCD_DATA(7) ELCD_DATA(8) ELCD_DATA(9) ELCD_DATA(10) ELCD_DATA(11) ELCD_DATA(12) ELCD_DATA(13) ELCD_DATA(14) ELCD_DATA(15) D21 F18 E19 G18 F20 H18 G19 H20 H19 H21 J20 J18 J21 J19 K21 N18 R18 V21 ELCD_DATA_0 ELCD_DATA_1 ELCD_DATA_2 ELCD_DATA_3 ELCD_DATA_4 ELCD_DATA_5 ELCD_DATA_6 ELCD_DATA_7 ELCD_DATA_8 ELCD_DATA_9 ELCD_DATA_10 ELCD_DATA_11 ELCD_DATA_12 ELCD_DATA_13 ELCD_DATA_14 ELCD_DATA_15 ELCD_DATA_16 ELCD_DATA_17 M14 M15 ELCD_NCS0 ELCD_NRESET L15 K15 ELCD_DNC ELCD_RNW D20 K14 ELCD_ESTRB ELCD_TE Y16 GPIO_10 V19 GPIO_18 GPIO 5 (INT) GPIO 63 GPIO 0 GPIO 7 z Check Point - The Assembly status of the LCD Module - The Soldering of connector - The FPCB which connects the LCD Module z Trouble Shooting Setup - Connect PIF Jig, and Power on LGE Internal Use Only - 64 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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- 64 -
4. Trouble Shooting
4.5 LCD Display Trouble shooting
z
LCD Control signals from Main Board
- The signal of DBB is ELCD_DATA(16BIT), ELCD_CS/WR/ADS, ELCD_CS,
- LCD MODULE POWER SOURCE and LCD reset.
- The signal of TCC are composed of LCD_DATA(16BIT) and LCD_CS/WR/ADS
z
Check Point
- The Assembly status of the LCD Module
- The Soldering of connector
- The FPCB which connects the LCD Module
z
Trouble Shooting Setup
- Connect PIF Jig, and Power on
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
GPIO 63
GPIO 7
GPIO 5 (INT)
GPIO 0
V19
GPIO_18
Y16
GPIO_10
ELCD_DATA_8
H19
H21
ELCD_DATA_9
ELCD_DNC
L15
ELCD_ESTRB
D20
M14
ELCD_NCS0
ELCD_NRESET
M15
K15
ELCD_RNW
ELCD_TE
K14
D21
ELCD_DATA_0
ELCD_DATA_1
F18
ELCD_DATA_10
J20
J18
ELCD_DATA_11
ELCD_DATA_12
J21
J19
ELCD_DATA_13
K21
ELCD_DATA_14
N18
ELCD_DATA_15
ELCD_DATA_16
R18
V21
ELCD_DATA_17
E19
ELCD_DATA_2
ELCD_DATA_3
G18
ELCD_DATA_4
F20
H18
ELCD_DATA_5
ELCD_DATA_6
G19
H20
ELCD_DATA_7
MM_INT
SLCD_RST
ELCD_ADS
FM_RESET
LCD_CS
MM_RESET
ELCD_WR
BPEN
GATED_IOEN
ELCD_RD
ELCD_DATA(15:0)
ELCD_DATA(4)
ELCD_DATA(5)
ELCD_DATA(6)
ELCD_DATA(7)
ELCD_DATA(8)
ELCD_DATA(9)
ELCD_DATA(0)
ELCD_DATA(1)
ELCD_DATA(10)
ELCD_DATA(11)
ELCD_DATA(12)
ELCD_DATA(13)
ELCD_DATA(14)
ELCD_DATA(15)
ELCD_DATA(2)
ELCD_DATA(3)