Northern LED284K User manual

LED284K
28” 4K Widescreen LED Security Monitor – Metal Housing
Rev. 101717
3625 Cincinnati Avenue, Rocklin, CA 95765 ♦855-388-7422 ♦www.northernvideo.com
USER MANUAL
LED284K

1
Contents
Important Information ..................................................................................................................... 2
Safety Warning.............................................................................................................................. 2
Notes............................................................................................................................................. 3
Introduction to the Product ............................................................................................................. 3
Product Appearance ..................................................................................................................... 4
Performance Features................................................................................................................... 4
External Connections ....................................................................................................................... 5
Main Menu....................................................................................................................................... 6
Main Menu.................................................................................................................................... 6
Picture Menu ................................................................................................................................ 7
Sound Menu.................................................................................................................................. 7
Option Menu................................................................................................................................. 8
Screen Menu................................................................................................................................. 8
Channel Selection ......................................................................................................................... 8
How to Clean Product ...................................................................................................................... 9
Troubleshooting ............................................................................................................................... 9

2
Important Information
Safety Warning
To use the product safely, correctly, and to keep users from suffering injury or property loss,
please observe the following safety precautions when installing, using or maintaining.
Please read this handbook before operating the product and keep the handbook for future
reference.
Notice and observe all the warnings and illustrations.
Do not adjust, maintain or modify if you do not have appropriate qualifications.
Do not open or remove the rear cover, box or cover board of the product. Please contact the
dealer or after-sales service center when in need of adjustment or maintenance.
Do not place any items on the product. The product may be damaged if foreign objects
enter the internal unit.
Do not tread on or squeeze the power line, especially the plug or connection point of the
power line to the product.
Do not put the product in flammable or corrosive gaseous environment, which may cause
fire or damage the product. Placing the product in proximity to flammable gas can easily
result in a dangerous explosion.
Please turn off power or unplug the power cable immediately if there is smoking, off-odor,
or abnormal noise. Contact the after-sales service center for maintenance after confirming
there is no more smoke or odor. Further use could result in fire.
Only qualified service people can maintain. If the product gets any kind of damage, such as
damage to the plug, foreign matter or liquid into the unit, exposure to rain or humidity, loss
of function, or dropped, please contact dealer or after-sales service center.
Do not expose the product to rain or chemicals. If the product is moist, allow to fully dry
before plugging in or turning on power.
Turn off the power when cleaning the product.
Failure to properly secure all screws during installation can result in a fall of the product.
Ensure all mounting hardware and other installation accessories are properly secured during
installation.
Do not touch any fixed components inside the product. Failure to do so can result in damage
to the product or person.
Be careful during maintenance of product even if the power is off. Some components are
equipped with UPS, and can continue to supply power which is dangerous to people.

3
Notes
Please put the product in a flat, stable and dry place. Avoid direct sunlight, high temperature,
humidity, dust, and corrosive gas.
If the product is installed on the wall, please make sure the wall’s load bearing capacity is
sufficient. To avoid falling and injuring people, install according to the included instructions
with mounting hardware.
The LCD may experience image distortion or color decay when the temperature variation is
too large. Wait for a moment (with power on) and the distortion should disappear.
Do not block the ventilation opening. Install the product according to this handbook.
Do not install the product near any heat source such as a radiator, heat register or stove.
Do not use uncertified connecting lines, which might cause equipment failure.
Do not press, stretch or heat the connecting lines, which might cause damage to it.
Please firmly grasp the plug of the connecting line when inserting and removing. Pulling the
connecting line might cause damage to it.
Cut off power and the connecting line immediately and contact the after-sales service
center if the product or the connecting line is damaged for some reason. Continued use
without maintenance might cause smoking or off-odor.
Do not hang or lean on the product. Doing so can cause the product to fall or become
damaged. It may also cause injury to people. Pay special attention when children are nearby.
Please turn off power for safety if not using the product for a long time.
Do not let the connecting line get squeezed, buckled, pulled or twisted.
Make sure the power is turned off and the connecting lines are removed when moving the
product.
Avoid collisions with the product. This may cause equipment failure.

4
Introduction to the Product
Product Appearance
（Photos are for reference only）
Performance Features
Supports 3D comb-filter and 3D de-interlace.
Low energy consumption, long service life.
High contrast ratio and high luminance.
Automatically eliminates ghosting.
Rapid response times, no trailing image.
Thin and light.
Full-HD LCD panel with top-ranking video processing chip.