46 / 90

Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes LGE Internal Use Only

→ 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
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
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
normal?
(When RF signal is not
received)
Request repair to external
cable/ANT provider
Y
Check audio
B+ Voltage (24V)
Replace Main B/D
(In case of External
Input signal error)
Check and fix
external device
Replace Main B/D
N
End

Established

date

Revised date

LCD TV Error

symptom

Standard Repair Process

A25

2012. 12 .06