LG 65UB930T Service Manual

C. Audio error
Wrecked audio/ discontinuation/noise
Established
date
Revised date
9/16
LCD TV
Error
symptom
Standard Repair Process
2013.01.31
→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
Wrecked
audio/
discontinuation/noise
Revised
date
9/16
☞
A21+A18
Wrecked audio/
Discontinuation/
Noise for
all audio
Check and replace
speaker and
connector
Y
Check input
signal
-
RF
Signal
Y
Check audio
B+ Voltage (24V)
☞
A21+A18
Wrecked audio/
Discontinuation/
Noise only
for D-TV
N
Normal
voltage?
-
RF
-External Input
signal
normal?
Replace Main B/D
N
Wrecked audio/
Discontinuation/
Noise only
for Analog
Replace Power B/D
(When RF signal is not
received)
Wrecked audio/
Discontinuation/
Noise only
for External Input
Connect and check
N
Normal
received)
Request repair to external
cable/ANT provider
Replace Main B/D
(In case of
End
Connect
and
check
other external
device
Y
Normal
audio?
Check and fix external device
External Input
signal error)
Check and fix
external device
Check
and
fix
external
device
9
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LG 65UB930T Specifications

General

Brand	LG
Model	65UB930T
Category	LED TV
Language	English