LG 55LM6200 (CHASSIS:LA22E) Service Manual ▷ View online
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Normal
voltage?
Check various voltages
of Power Board
( 3.5V,12V,20V or
24V…)
of Power Board
( 3.5V,12V,20V or
24V…)
No Video/
No audio
No audio
Check and
replace
MAIN B/D
replace
MAIN B/D
Y
Replace Power
Board and repair
parts
Board and repair
parts
N
End
Standard Repair Process
A. Video error
No video/ No audio
☞A4
Established
date
Revised date
2/13
LCD TV
Error
symptom
2010. 12 .14
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A. Picture Problem
Picture broken/ Freezing
Y
N
☞ A6
N
Check RF Signal level
Normal
Signal?
Check RF Cable
Connection
1. Reconnection
2. Install Booster
Check
S/W Version
Booster menu
On→Off: Check
Off→On: Check
Off→On: Check
S/W Upgrade
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ DVD Player ,Set-Top-Box, Different maker TV etc`
SVC
Bulletin?
Replace
Main B/D
Check
Tuner soldering
Normal
Picture?
Y
N
Y
Close
Normal
Picture?
Y
Close
■ Menu→Setup →Booster
. By using Digital signal level meter
. By using Diagnostics menu on OSD
. By using Diagnostics menu on OSD
( Menu→ Set up→ Support → Signal Test )
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
- Signal Quality (Normal: over 50%)
Normal
Picture?
Y
Contact with signal distributor
or broadcaster (Cable or Air)
N
N
Normal
Picture?
Y
Close
N
☞ A7
Standard Repair Process
Established
date
Revised date
3/13
LCD TV
Error
symptom
2010. 12 .14
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A. Picture Problem (DVB-S/S2)
Tuning fail, Picture broken/ Freezing
Y
N
☞ A6
Check RF Signal level
Normal
Signal?
Check
S/W Version
S/W Upgrade
SVC
Bulletin?
Normal
Picture?
Y
N
Y
Close
Check RF signal cable (DVB satellite signal or not)
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
(By connecting RF Cable at other equipment)
→ Set-Top-Box, Different maker TV etc
Y
Change satellite setting
(match with installed ANT)
N
Normal
Picture?
Y
Close
N
☞ A7
Standard Repair Process
Established
date
Revised date
3/13
LCD TV
Error
symptom
2011. 01 .24
Check satellite setting.
- Check LNB frequency.
- Check satellite
- Check Satellite connection
- Check LNB frequency.
- Check satellite
- Check Satellite connection
(DiSEqC, motor, etc…)
Normal
setting?
Contact with
signal distributor
or broadcaster
(Cable or Air)
Close
N
Check
Tuner soldering
Replace
Main B/D
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Color
error?
Y
N
※ Check and
replace Link
Cable
(LVDS) and
contact
condition
replace Link
Cable
(LVDS) and
contact
condition
Y
N
Replace Main B/D
Color
error?
Check error
color input mode
color input mode
Check color by input
-External Input
-COMPONENT
-RGB
-HDMI/DVI
-External Input
-COMPONENT
-RGB
-HDMI/DVI
Y
External device
/Cable
normal
External Input/
Component
error
Check
external
device and
cable
external
device and
cable
Y
External device
/Cable
normal
RGB/
HDMI/DVI
error
Check external
device and
cable
device and
cable
Replace Main B/D
Replace Main B/D
N
N
A. Video error
Color error
☞A8
N
Y
End
Replace module
Request repair
for external
device/cable
Color
error?
Check Test pattern
☞A12
☞ A10/ A11
Standard Repair Process
Established
date
Revised date
4/13
LCD TV
Error
symptom
2010. 12 .14
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