DOWNLOAD LG 42LW5500-ZE / 42LW550T-ZE / 42LW550W-ZE / 42LW551C-ZE / 42LW5590-ZE (CHASSIS:LD12C) Service Manual ↓ Size: 9.69 MB | Pages: 70 in PDF or view online for FREE

Model
42LW5500-ZE 42LW550T-ZE 42LW550W-ZE 42LW551C-ZE 42LW5590-ZE (CHASSIS:LD12C)
Pages
70
Size
9.69 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lw5500-ze-42lw550t-ze-42lw550w-ze-42lw551c-ze-42.pdf
Date

LG 42LW5500-ZE / 42LW550T-ZE / 42LW550W-ZE / 42LW551C-ZE / 42LW5590-ZE (CHASSIS:LD12C) Service Manual ▷ View online

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)
→ 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 
4/14
LCD  TV
Error
symptom
4
2011. 01 .24
Check satellite setting.
-
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
Color
error?
Y
N
※ Check 
and replace 
Link Cable
(LVDS) and 
contact 
condition
Y
N
Replace Main B/D
Color
error?
Check error 
color input 
mode
Check color by input
-External Input
-COMPONENT
-
RGB
-
HDMI/DVI
Y
External device
/Cable
normal
External Input/
Component
error
Check 
external 
device and
cable
Y
External device
/Cable
normal
RGB/
HDMI/DVI
error
Check external 
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 
5/14
LCD  TV
Error
symptom
5
2010. 12 .14
Screen
normal?
N
Y
Check external 
device 
connection 
condition
Y
N
Check and 
replace Link 
Cable
Normal?
Y
N
Screen
normal?
Replace Main B/D
(adjust VCOM)
Replace 
module
Check color condition by input
-External Input
-Component
-
RGB
-
HDMI/DVI
End
Vertical/Horizontal bar, residual image, light spot
Request repair 
for external 
device
A. Video error
Vertical / Horizontal bar, residual image, 
light spot, external device color error 
A12
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. 
N
Y
Replace 
Main B/D
Screen
normal?
Check screen 
condition by 
input
-External Input
-Component
-
RGB
-
HDMI/DVI
Request repair for 
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. 
Replace 
Main B/D
Screen
normal?
N
Y
Check S/W Version
Y
N
Check
version
S/W Upgrade
Y
N
Normal
screen?
End
Y
N
Replace Main 
B/D
For LGD panel
Replace
Module
Screen
normal?
End
Established
date 
Revised date 
6/14
LCD  TV
Error
symptom
Standard Repair Process
A8
☞ A10/ A11
Check Test pattern
☞ A28
6
For other panel
2010. 12 .14
B. Power error
No power
Power 
LED On?
Y
N
DC Power on
by pressing Power Key 
On Remote control
Y
N
Normal 
operation?
Check Power 
On ‘”High”
Check Power cord
was inserted properly
Check 
Power LED
Replace 
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
Y
A17
A18
A19
A4
Standard Repair Process
Established
date 
Revised date 
7/14
LCD  TV
Error
symptom
7
. Stand-By: Red
. Operating: white
Close
2010. 12 .14
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