LG 32LN5700 / 32LN5730 (CHASSIS:LT33B) Service Manual ▷ View online
6 / 97
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
-AV
-HDMI/DVI
-External Input
-COMPONENT
-AV
-HDMI/DVI
Y
External device
/Cable
normal
External Input/
Component/ AV
error
Check
external
device and
cable
external
device and
cable
Y
External device
/Cable
normal
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
Established
date
Revised date
4/13
LCD TV
Error
symptom
2012. 12 .21
Standard Repair Process
7 / 97
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, AV
and HDMI/DVI by connecting Jig,
pattern Generator ,Set-top Box
etc.
and cable
(Check normal operation of
External Input, Component, AV
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
-AV
-HDMI/DVI
condition by input
-External Input
-Component
-AV
-HDMI/DVI
Request repair for
external device
external device
Component/AV
error
HDMI/
DVI
Connect other external device
and cable
(Check normal operation of
External Input, Component, AV
and HDMI/DVI by connecting
Jig, pattern Generator ,Set-top
Box etc.
and cable
(Check normal operation of
External Input, Component, AV
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
-AV
-HDMI/DVI
-External Input
-Component
-AV
-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
2012. 12 .21
Standard Repair Process
8 / 97
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 or Logo Light ON
. Operating : off
. Operating : off
※
Close
2012. 12 .21
Standard Repair Process
9 / 97
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.
Click the below Hyper_link
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
2012. 12 .21
Standard Repair Process
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