LG 55EA9800-SA (CHASSIS:EJ34D) Service Manual ▷ View online
A. Video error
Color error
Standard Repair Process
Established
date
Revised date
4/16
LCD TV
Error
symptom
2013.01.31
Color error
Revised date
4/16
Color
Y
※
Check
and replace
Link Cable
Link Cable
Y
Replace Main B/D
Color
Check color by input
-External Input
-External Input
COMPONENT
☞
A6
Y
Replace module
Color
☞
A7
error?
N
(EPI) and
contact
condition
contact
condition
N
Replace Main B/D
error?
Check error
-COMPONENT
-AV
-HDMI
-AV
-HDMI
N
End
Replace module
error?
color input
mode
mode
Y
External device
/C bl
External Input/
C
t
Check
external
external
R l
M i B/D
Ch k T t
tt
☞
A8
/Cable
normal
Component
error
external
device and
cable
device and
cable
Replace Main B/D
N
Request repair
Check Test pattern
Y
External device
Check external
N
for external
device/cable
External device
/Cable
normal
HDMI
error
device and
cable
cable
Replace Main B/D
4
A. Video error
Vertical / Horizontal bar, residual image,
Established
date
Revised date
5/16
LCD TV
Error
symptom
Standard Repair Process
2013.01.31
Vertical/Horizontal bar, residual image, light spot
light spot, external device color error
Replace
Module
Module
Revised date
5/16
Screen
normal?
Y
Check external
device
connection
device
connection
Y
Check and
replace Link
Cable
replace Link
Cable
Normal?
N
Screen
normal?
Replace Main B/D
(adjust VCOM)
(adjust VCOM)
Check color condition by input
-External Input
-Component
-External Input
-Component
HDMI
N
Module
Screen
normal?
☞
A6
☞
A7
N
condition
N
Cable
Y
(adjust VCOM)
Replace
module
module
-HDMI
End
Request repair
for external
for external
☞
A8
Y
Replace Main B/D
For LGD panel
End
device
A8
External device screen error-Color error
Check Test pattern
For other panel
External
Input
error
Connect other external
device and cable
device and cable
N
Replace
Screen
Check screen
condition by input
-External Input
-Component
-HDMI/DVI
condition by input
-External Input
-Component
-HDMI/DVI
Check S/W Version
N
Check
version
(Check normal operation of
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
Y
Replace
Main B/D
Main B/D
normal?
Request repair for
Component
error
Y
S/W Upgrade
external device
HDMI/
DVI
Connect other external
device and cable
device and cable
(Check normal operation of
E t
E t
l I
t C
t
Replace
Main B/D
Main B/D
Screen
normal?
N
Y
N
Normal
screen?
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
Main B/D
normal?
Y
End
5
B. Power error
No power
Standard Repair Process
Established
date
Revised date
6/16
LCD TV
Error
symptom
2013.01.31
No power
DC Power on
N
R l
☞
A17
☞
A18
Revised date
6/16
Power LED
On?
Y
N
DC Power on
by pressing Power Key
On Remote control
by pressing Power Key
On Remote control
Y
N
Normal
operation?
Check Power
On ‘”High”
On ‘”High”
Check Power cord
Check
Logo LED
Logo LED
Replace
Power
B/D
Power
B/D
Y
OK?
Replace Main B/D
. Stand-By: Red or Turn Off
. Operating: Turn Off
. Operating: Turn Off
Check Power cord
was inserted properly
was inserted properly
Measure voltage of each output of Power B/D
Replace Main B/D
N
Normal?
☞
A18
Y
Normal
voltage?
Replace Main B/D
Y
Y
※
N
g
Check ST-BY 3.5V
Replace Power B/D
N
Y
Normal
voltage?
☞
A18
Close
Replace Power
B/D
B/D
6
B. Power error
Off when on off while viewing power auto on/off
Established
date
Revised date
7/16
LCD TV
Error
symptom
Standard Repair Process
2013.01.31
Off when on, off while viewing, power auto on/off
Check outlet
☞
A19
Revised date
7/16
Error?
N
Check Power Off
Mode
Mode
Check A/C cord
Check for all 3- phase
Replace Main B/D
CPU
Abnormal
N
Y
Normal?
End
Y
Fix A/C cord & Outlet
and check each 3
and check each 3
Check for all 3- phase
power out
(If Power Off mode
Replace Power B/D
☞
A18
Abnormal
1
phase out
(If Power Off mode
is not displayed)
Check Power B/D
voltage
is not displayed)
Check Power B/D
voltage
Y
N
Replace Main B/D
Normal
voltage?
※
Caution
Ch k
d fi
i
Replace Power B/D
Check and fix exterior
of Power B/D Part
of Power B/D Part
Status
Power off List
Explanation
"POWEROFF REMOTEKEY"
P
ff b REMOTE CONTROL
* Please refer to the all cases which
N
l
"POWEROFF_REMOTEKEY"
Power off by REMOTE CONTROL
"POWEROFF_OFFTIMER"
Power off by OFF TIMER
"POWEROFF_SLEEPTIMER"
Power off by SLEEP TIMER
"POWEROFF_INSTOP"
Power off by INSTOP KEY
"POWEROFF_AUTOOFF"
Power off by AUTO OFF
"POWEROFF ONTIMER"
P
ff b ON TIMER
can be displayed on power off mode.
Normal
"POWEROFF_ONTIMER"
Power off by ON TIMER
"POWEROFF_20V_DET"
Power off by AC OFF
"POWEROFF_RESREC"
Power off by Reservated Record
"POWEROFF_RECEND"
Power off by End of Recording
"POWEROFF_SWDOWN"
Power off by S/W Download
"POWEROFF UNKNOWN"
P
ff b
k
t t
t li t d
7
"POWEROFF_UNKNOWN"
Power off by unknown status except listed case
Abnormal
"POWEROFF_ABNORMAL1"
Power off by abnormal status except CPU trouble
"POWEROFF_CPUABNORMAL"
Power off by CPU Abnormal
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