LG 42LW6500-JA (CHASSIS:LE13E) Service Manual ▷ View online
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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
9/14
LCD TV
Error
symptom
Standard Repair Process
☞
A25
9
2011.01.20
D. General Function Problem
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
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
10/14
LCD TV
Error
symptom
10
2011.01.20
Check technical
information
- Fix information
- S/W Version
information
- Fix information
- S/W Version
N
Y
Technical
information?
Check
input
signal
input
signal
Signal
input?
input?
Y
N
External Input and
Component
Recognition error
Check and fix
external device/cable
external device/cable
RGB,HDMI/
DVI, Optical
Recognition error
Replace Main B/D
Replace Main B/D
Fix in
accordance
with technical
information
D. Function error
External device recognition error
Established
date
Revised date
11/14
LCD TV
Error
symptom
Standard Repair Process
11
2011.01.20
D. Function error
External device recognition error
Established
date
Revised date
12/14
LCD TV
Error
symptom
Standard Repair Process
12
2011.01.20
3D
signal?
N
Y
Check and
Replace
LVDS cable (51p)
Replace
LVDS cable (51p)
Y
N
Error?
Replace
external device
or contents
external device
or contents
End
3D / 2D to 3D video Error
Check
input
signal
input
signal
Check and
Replace
FRC B/D
Replace
FRC B/D
Y
N
Error?
End
Check and
Replace
Main B/D
Replace
Main B/D
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