LG 43LF5900 Service Manual page 57

Standard Repair Process Detail Technical Manual
symptom
Content
<ALL MODELS>
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error
A. Video error_Video error, video lag/stop
TUNER input signal strength checking method
Menu(QUICK SETTING)  Channels
Established
date
Revised
date

Channel Tuning  Manual Tuning  Antenna DTV
When the signal is strong, use the
attenuator (-10dB, -15dB, -20dB etc.)
A6
LGE Internal Use Only