user manual

4-24 Service Tests
HP DesignJet 430, 450C and 455CA Printers
Electrical Test
               
  !
THIS TEST HAS BEEN FOUND TO BE VERY UNSTABLE DUE TO
SOME INTERACTIONS BETWEEN SOME OF THE COMPONENTS
OF THE ELECTRONICS MODULE. IT IS SOMETIMES IMPOSSIBLE
TO EXIT THIS TEST WITHOUT SWITCHING OFF THE PRINTER.
      #
1  "  2  Electrical Test   $
2   #       #        
3        #     %  
       $ !  !