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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. 

 
 
 

Summary of Contents for LED284K

Page 1: ...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...

Page 2: ...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 Sele...

Page 3: ...s 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 maint...

Page 4: ...use 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 conne...

Page 5: ...rmance 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 tr...

Page 6: ...Support USB update DP INPUT Display Port Attention Please turn off the power of the external device and the product when connecting Main Menu Main Menu To activate press the menu button on the bottom...

Page 7: ...to change the selected function in OSD menu item D Rightward button Press the button to move the cursor to the needed function Press the button to change the selected function in OSD menu item E Left...

Page 8: ...olume calibration surround sound EQ and sound mode Press button to adjust value when item is selected press menu button to exit Option Menu Option menu can adjust OSD language set restore the unit to...

Page 9: ...een Menu Screen menu can adjust the H position V position clock phase and auto adjust the position of the image within the unit Press button to adjust value when item is selected press menu button to...

Page 10: ...the clean soft towel Wipe dry after cleaning it 3 Rubbing or scrapping the housing with fingernails or other hard objects might scratch the housing Troubleshooting Before consulting service staff ple...

Page 11: ...by other electric appliance may be present 5 Adjust fine tuning setting 6 Adjust luminance setting 7 Adjust contrast ratio setting 8 Adjust color setting 9 Check whether the system is set up properly...

Page 12: ...11 Dimensions...

Page 13: ...t o Selectable 16 9 or 4 3 in OSD Pixel Pitch 0 16 mm x 0 16 mm Color Depth 1 073G Brightness 250 cd m2 Contrast o 1000 1 Viewing Angle H V 178 178 Response Time 5 5ms Auto Adjustment Yes CE FCC UL La...

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