LG 42LW5400 Service Manual page 53

Standard Repair Process Detail Technical Manual
symptom
LCD TV
<ALL MODELS>
Copyright © 2011 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Error
A. Video error_Video error, video lag/stop
TUNER input signal strength checking method
Content
Established
date
Revised
date
MENU - red key(customer support -
- select channel
When the signal is strong, use the
attenuator (-10dB, -15dB, -20dB etc.)
A6
A6
signal test
LGE Internal Use Only