LG 55EC9300 Repair Manual page 85

Standard Repair Process
LCD TV
Vertical/Horizontal bar, residual image, light spot
☞A6 A6
Check color condition by input
-External Input
-Component
-HDMI
☞A8
Check Test pattern
External device screen error-Color error
Check S/W Version Check S/W Version
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Only for training and service purposes
Error
symptom
Vertical / Horizontal bar, residual image,
light spot, external device color error light spot, external device color error
Check external
Y
device
Screen
connection
normal?
condition
N N
Replace
module
Check screen
condition by input
-External Input
N N
Check Check
-Component
version
-HDMI/DVI
Y
S/W Upgrade pg
Normal N
screen?
Y
End
A. Video error
☞ A7
Check and
Y
Normal? replace Link
Cable
N
Request repair
for external
device
External
Input
error
Component
error
HDMI/
DVI
5
Established
2013.01.31
date
Revised date
N
Screen
Replace Main B/D
normal?
(adjust VCOM)
For LGD panel
Y Y
Replace Main B/D
End
For other panel
Connect other external
device and cable
Screen
(Check normal operation of
normal?
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
Request repair for
external device
Connect other external
device and cable
Screen
(Check normal operation of (Check normal operation of
normal?
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
5/16
Replace
Module
N
Screen
normal?
Y
End
N
Replace
Main B/D
Y
Y
N
Replace p
Main B/D
LGE Internal Use Only