Wrecked Audio/ Discontinuation/Noise - LG 42LB5800 Service Manual

Standard Repair Process
Error Error
LCD TV
symptom
→ abnormal audio/discontinuation/noise is same after "Check input signal" compared to No audio
Check input
signal
Signal Signal
-RF
normal?
-External Input
signal
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C. Audio error C. Audio error

Wrecked audio/ discontinuation/noise

Y
N
(When RF signal is not
received)
R Request repair to external t i t t l
cable/ANT provider
(In case of External
Input signal error)
Check and fix
external device
Established
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/ W k d di /
Discontinuation/
Noise only
for Analog
Wrecked audio/
Discontinuation/
Noise only
for External Input
Connect and check
other external device
11 / 97
2014 1 2 2014.1.2
d t date
☞A25
Check audio
B+ Voltage (24V)
Y
Normal
voltage?
N
Replace Power B/D
Replace Main B/D R l M i B/D
N
Normal
audio?
Y
Check and fix external device
9/13
End End
LGE Internal Use Only