LG 65UF6790 Service Manual page 78

Standard Repair Process Detail Technical Manual
symptom
Content
<ALL MODELS>
Copyright 2015 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
Established
date
Revised
date
Advanced Channels
Manual Tuning
A3

Channel Tuning
When the signal is strong,
use the attenuator (-10dB, -
15dB, -20dB etc.)
LGE Internal Use Only
A3