LG 55LM860V (CHASSIS:LD23E) Service Manual ▷ View online
→ 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 Power B/D
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 audio
B+ Voltage (24V)
B+ Voltage (24V)
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
9/15
LCD TV
Error
symptom
Standard Repair Process
☞A25
9
2012.01.16
D. Function error
Remote control & Local switch checking
Y
N
1. Remote control(R/C) operating error
Check R/C itself
Operation
Normal
operating?
Normal
operating?
Y
Close
Replace R/C
If R/C operate,
Explain the customer
cause is interference
from light in room.
Check R/C Operating
When turn off light
in room
Check & Replace
Baterry of R/C
Check & Repair
Cable connection
Connector solder
Normal
operating?
Check B+
3.5V
On Main B/D
☞A27
Normal
Voltage?
Close
N
N
Check 3.5v on Power B/D
Replace Power B/D or
Replace Main B/D
(Power B/D don’t have problem)
☞A4
Check IR
Output signal
Normal
Signal?
N
Y
Repair/Replace
IR B/D
N
☞A27
Replace
Main B/D
Y
☞A27
Standard Repair Process
Established
date
Revised date
10/15
LCD TV
Error
symptom
10
2012.01.16
Y
D. Function error
M4 operating checking
Y
N
2. M4(Magic Remocon) operating error
Check M4 itself
Operation
Normal
operating?
Normal
operating?
Y
Close
Check & Replace
Batterry of M4
Is show ok
message?
Press the
wheel
Is show ok
message?
Close
N
N
N
Y
Standard Repair Process
Established
date
Revised date
11/15
LCD TV
Error
symptom
11
2012.01.16
Replace M4
Turn off/on the
set and press
the wheel
Press the back
key about 5sec
Close
* If you conduct the loop at 3times, change the M4.
Y
Check the
INSTART menu
RF Receiver ver
is “00.00”?
Y
Check & Repair
RF assy
connection
N
Down load the Firmware
* INSTART MENU
Æ15.RF
Remocon Test
Æ3. Firmware
download
Y
RF Receiver ver
is “00.00”?
N
Close
☞A28
☞A7
☞A7
D. Function error
Wifi operating checking
3.Wifi operating error
Check the
INSTART menu
Wi-Fi Mac value
is “NG”?
Y
Check & Repair
Wifi cable
connection
N
Check the Wifi wafer
(P4301)_1pin
Standard Repair Process
Established
date
Revised date
12/15
LCD TV
Error
symptom
12
2012.01.16
Change the Wifi
assy
Normal
Voltage?
Close
Y
Y
N
Replace
Main B/D
Wi-Fi Mac value
is “NG”?
N
Close
☞A29
☞A7
☞A7
☞A29
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