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Standard Repair Process
LCD TV
→ abnormal audio/discontinuation/noise is same after "Check input signal" compared to No audio
Check input
signal
-RF
-External Input
signal
Copyright © 2011 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
C. Audio error
Error
symptom
Wrecked audio/ discontinuation/noise
Y
Signal
normal?
N
(When RF signal is not
received)
Request repair to external
cable/ANT provider
(In case of
External Input
signal error)
Check and fix
external device
Established
date
Revised date
Wrecked audio/
Check and replace
Discontinuation/
speaker and
Noise for
connector
all audio
Wrecked audio/
Discontinuation/
Replace Main B/D
Noise only
for D-TV
Wrecked audio/
Discontinuation/
Noise only
for Analog
Wrecked audio/
Connect and check
Discontinuation/
other external
Noise only
device
for External Input
10
2010. 12 .14
10/14
☞A25
Check audio
B+ Voltage (24V)
Y
Normal
voltage?
N
Replace Power B/D
N
Normal
Replace Main B/D
audio?
Y
Check and fix external device
End
LGE Internal Use Only
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