Chapter 4  MAINTENANCE 
4.2  MAINTENANCE ON EACH UNIT 
4-5 
4 
INSTRUCTION MANUAL 
4.2.2  DISPLAY UNIT NCD-2237 
WARNING
 
 
When cleaning the display screen, do not wipe it too strongly with 
a dry cloth. Also, do not use gasoline or thinner to clean the 
screen. 
Failure to comply will result in damage to the screen surface. 
 
Dust accumulated on the screen will reduce clarity and darken the video. 
For cleaning it, wipe it with a piece of soft cloth (flannel or cotton). Do not wipe it 
strongly with a piece of dry cloth nor use gasoline or thinner.