5-3
B. EDGE GLOW
Edge glow is a br ight area (s ometimes sp arkling) in the outer
portion of the viewing area (see Figure 5-2) . To check for edge
glow, block out all ligh t by cupping a hand over the lens. If the
image tube is displaying edge glow the bright area will still show
up. Return the ATN NVM-14 to the maintainer.
Figure 5-2