LG 32LN52XX / 32LN520B (CHASSIS:LD36M) Service Manual ▷ View online
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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
Adapter
Adapter
Measure DC 24V from Adapter
N
Y
Normal
voltage?
Replace Main B/D
Y
OK?
Replace Main B/D
N
Y
Normal?
Check ST-BY 3.5V
Replace Adapter
N
Normal
voltage?
Replace Adapter
Y
☞A11
☞A12
☞A13
☞A4
Standard Repair Process
Established
date
Revised date
7/14
LCD TV
Error
symptom
. Stand-By : Red
※
Close
2013. 01 .09
8 / 36
B. Power error
Off when on, off while viewing, power auto on/off
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
power out
Check outlet
Replace Main B/D
CPU
Abnormal
(If Power Off mode is
not displayed)
Check Adapter
voltage
not displayed)
Check Adapter
voltage
Y
N
Replace Main B/D
Normal
voltage?
Replace Adapter
Replace Adapter
N
Y
Normal?
End
※ Caution
Check and fix exterior
of Power B/D Part
Check and fix exterior
of Power B/D Part
☞A14
☞A13
Established
date
Revised date
8/14
LCD TV
Error
symptom
Standard Repair Process
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_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
* Please refer to the all cases which
can be displayed on power off mode.
can be displayed on power off mode.
Abnormal
1
2013. 01 .09
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No audio
Screen normal
Screen normal
Check user
menu >
Speaker off
menu >
Speaker off
Off
N
Y
Cancel OFF
Check DC24V from
Adapter
Adapter
Normal
voltage
voltage
Y
N
Replace Adapter
Check Speaker
disconnection
disconnection
N
Y
Replace Speaker
Replace Main B/D
End
C. Audio error
No audio/ Normal video
☞A15
☞A4
Disconnection
Established
date
Revised date
9/14
LCD TV
Error
symptom
Standard Repair Process
2013. 01 .09
10 / 36
-
abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
C. Audio error
Wrecked audio/ discontinuation/noise
Wrecked audio/
Discontinuation/
Noise for
all audio
Check and replace
speaker and
connector
speaker and
connector
Wrecked audio/
Discontinuation/
Noise only
for D-TV
Wrecked audio/
Discontinuation/
Noise only
for Analog
Wrecked audio/
Discontinuation/
Noise only
for External Input
Connect and check
other external
device
other external
device
N
Y
Normal
audio?
Check and fix external device
Replace Adapter
N
Y
Normal
voltage?
Check input
signal
-RF
-External Input
signal
signal
-RF
-External Input
signal
Signal
normal?
(When RF signal is not
received)
Request repair to external
cable/ANT provider
received)
Request repair to external
cable/ANT provider
Y
Check DC24V
From Adapter
From Adapter
Replace Main B/D
(In case of
External Input
signal error)
Check and fix
external device
External Input
signal error)
Check and fix
external device
Replace Main B/D
N
End
Established
date
Revised date
10/14
LCD TV
Error
symptom
Standard Repair Process
☞A4
2013. 01 .09
☞A7
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