LG 42LT770H User Manual

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If an outside antenna or cable system is connected to the 

product, follow the precautions below. 

 

An outdoor antenna system should not be located in the  

vicinity of overhead power lines or other electric light or power 

circuits or where it can come into contact with such power 

lines or circuits as death or serious injury can occur.

 

Be sure the antenna system is grounded so as to provide 

some protection against voltage surges and built-up static 

charges. 

 

Article 810 of the National Electrical Code (NEC) in the U.S.A. 

provides information with respect to proper grounding of the 

mast and supporting structure, grounding of the lead-in wire 

to an antenna-discharge unit, size of grounding conductors, 

location of antenna-discharge unit, connection to grounding 

electrodes, and requirements for the grounding electrode. 

When cleaning, unplug the power cord and wipe gently with 

a soft cloth to prevent scratching. Do not spray water or other 

liquids directly on the TV as electric shock may occur. Do not 

clean with chemicals such as alcohol, thinners or benzene.  

Make sure the TV is turned Off and unplugged and that all 

cables have been removed. It may take two or more people 

to carry larger TVs. Do not press against or put stress on the 

front panel of the TV during transport. 

Install the TV where there is proper ventilation. Do not install 

in a confined space such as a bookcase. Do not cover the TV 

with cloth or other materials (e.g., plastic) while it is plugged 

in. Do not install in excessively dusty places.   

26.  Do not touch the ventilation openings, as they may become 

hot while the TV is operating.  

27.  If you smell smoke or other odors coming from the TV or 

hear strange sounds, unplug the power cord, and contact an 

authorized service center.

28.  Do not press against the front panel of the TV with your 

hand or a sharp object (e.g., a nail, pencil, or pen) or make a 

scratch on it.

29.  Keep the product away from direct sunlight.
30.  Dot Defect

The LCD panel is a high technology product with resolution 

of two million to six million pixels. In a very few cases, you 

could see fine dots on the screen while you are viewing the 

TV. Those dots are deactivated pixels and do not affect the 

performance and reliability of the TV.

“Cracking”: A cracking noise that occurs while the TV is  

On or when it is turned Off is generated by plastic thermal 

contraction due to temperature and humidity. This noise is 

common for products where thermal deformation is required.
Electrical circuit humming/panel buzzing: A low level noise is 

generated from a high-speed switching circuit, which supplies 

a large amount of current to operate a product. It varies  

depending on the product. This generated sound does not 

affect the performance and reliability of the product.

If the TV feels cold to the touch, there may be a small “flicker” 

when it is turned On. This is normal; there is nothing wrong 

with the TV. Some minute dot defects may be visible on the 

screen, appearing as tiny red, green, or blue spots. However, 

they have no adverse effect on the TV’s performance. Avoid 

touching the LCD screen or holding your finger(s) against it for 

long periods of time. Doing so may produce some temporary 

distortion effects on the screen.

Antenna Lead in Wire

Antenna Discharge Unit

(NEC Section 810-20)

Grounding Conductor

(NEC Section 810-21)

Ground Clamps

Power Service Grounding

Electrode System (NEC

Art 250, Part H)

 

Ground Clamp

Electric Service

Equipment