C. Audio error
Wrecked audio/ discontinuation/noise
Established
date
Revised date
9/13
LCD TV
Error
symptom
Standard Repair Process
2013. 11 .30
2014. 02 .04
→
Abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
Wrecked audio/
Discontinuation/
Check and replace
Check audio
☞
A25
Discontinuation/
Noise for
all audio
speaker and
connector
Wrecked audio/
Discontinuation/
Y
Normal
voltage?
Check input
signal
-RF
-External Input
signal
Signal
normal?
Y
Check audio
B+ Voltage (24V)
Replace Main B/D
N
Noise only
for D-TV
Wrecked audio/
Discontinuation/
Noise only
Replace Power B/D
N
voltage?
signal
Replace Main B/D
N
o se o y
for Analog
Wrecked audio/
Discontinuation/
Noise only
(When RF signal is not
received)
Request repair to external
cable/ANT provider
Replace Main B/D
End
Noise only
for External Input
Connect and check
other external device
N
Y
Normal
audio?
(In case of External
Input signal error)
Check and fix
external device
Check and fix external device
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Summary of Contents for 42LB700T
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