LG 47LM6690 (CHASSIS:LT22E) Service Manual ▷ View online
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A. Video error
Vertical / Horizontal bar, residual image,
light spot, external device color error
light spot, external device color error
Established
date
Revised date
5/13
LCD TV
Error
symptom
External device screen error-Color error
External
Input
error
Connect other external device
and cable
(Check normal operation of
External Input, Component, RGB
and HDMI/DVI by connecting Jig,
pattern Generator ,Set-top Box
etc.
and cable
(Check normal operation of
External Input, Component, RGB
and HDMI/DVI by connecting Jig,
pattern Generator ,Set-top Box
etc.
N
Y
Replace
Main B/D
Main B/D
Screen
normal?
Check screen
condition by input
-External Input
-Component
-RGB
-HDMI/DVI
condition by input
-External Input
-Component
-RGB
-HDMI/DVI
Request repair for
external device
external device
Component
error
RGB
error
HDMI/
DVI
Connect other external device
and cable
(Check normal operation of
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
and cable
(Check normal operation of
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
Replace
Main B/D
Main B/D
Screen
normal?
N
Y
Check S/W Version
Y
N
Check
version
S/W Upgrade
Y
N
Normal
screen?
End
Screen
normal?
N
Y
Check external
device
connection
condition
device
connection
condition
Y
N
Check and
replace Link
Cable
replace Link
Cable
Normal?
Y
N
Screen
normal?
Replace Main B/D
(adjust VCOM)
(adjust VCOM)
Replace
module
module
Check color condition by input
-External Input
-Component
-RGB
-HDMI/DVI
-External Input
-Component
-RGB
-HDMI/DVI
End
Vertical/Horizontal bar, residual image, light spot
Request repair
for external
device
for external
device
☞A12
Y
N
Replace Main B/D
For LGD panel
Replace
Module
Module
Screen
normal?
End
☞A8
☞ A10/ A11
Check Test pattern
☞ A28
For other panel
2010. 12 .14
Standard Repair Process
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B. Power error
No power
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
was inserted properly
was inserted properly
Check
Power LED
Power LED
Replace
Power
B/D
Power
B/D
Measure voltage of each output of Power B/D
N
Y
Normal
voltage?
Replace Main B/D
N
Y
OK?
Replace Main B/D
N
Y
Normal?
Check ST-BY 3.5V
Replace Power B/D
N
Y
Normal
voltage?
Replace Power
B/D
B/D
Y
☞A17
☞A18
☞A19
☞A4
Established
date
Revised date
6/13
LCD TV
Error
symptom
. Stand-By: Red
. Operating: white
. Operating: white
※
Close
2010. 12 .14
Standard Repair Process
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Status
Power off List
Explanation
Normal
"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"
Power off by ON TIMER
"POWEROFF_RS232C"
Power off by RS232C
"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"
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
B. Power error
Off when on, off while viewing, power auto on/off
※ Caution
Check and fix exterior
of Power B/D Part
of Power B/D Part
Established
date
Revised date
7/13
LCD TV
Error
symptom
* Please refer to the all cases which
can be displayed on power off mode.
Error?
N
Y
Check Power Off
Mode
Mode
Fix A/C cord & Outlet
and check each 3
phase out
and check each 3
phase out
Check A/C cord
Check for all 3- phase
power out
Check outlet
Replace Main B/D
CPU
Abnormal
(If Power Off mode is
not displayed)
Check Power B/D
voltage
not displayed)
Check Power B/D
voltage
Y
N
Replace Main B/D
Normal
voltage?
Replace Power B/D
Replace Power B/D
N
Y
Normal?
End
☞A22
☞A19
Abnormal
1
2010. 12 .14
Standard Repair Process
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No audio
Screen normal
Screen normal
Check user
menu >
Speaker off
menu >
Speaker off
Off
N
Y
Cancel OFF
Check audio B+ 24V
of Power Board
of Power Board
Normal
voltage
voltage
Y
N
Replace Power Board and repair parts
Check Speaker
disconnection
disconnection
N
Y
Replace Speaker
Replace MAIN Board
End
C. Audio error
No audio/ Normal video
☞A24
☞A25
Disconnection
Established
date
Revised date
8/13
LCD TV
Error
symptom
2010. 12 .14
Standard Repair Process
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