1) Safety Screen
-@$  $! , !     
   . H   %    $ "Interval" 
"Second".
H   Scroll (), Pixel (), Bar (:)  Eraser (&) 
  Screen Type (Z ).
   MagicNet  %   MagicNet.
3   * %  1, 2, 3, 4, 5     
10, 20, 30, 40, 50  #,    .
! Maintenance Control ( *)  %  ,
 "   * ON ($).
Maintenance
Video Wall
1. 0  $ "Maintenance"  % ! $.    Maintenance ().
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