CRT OF REMAIN MAGNET FLUX DEGAUSSING METHOD

摘要

The present invention relates to a method of removing residual flux of CALTI, and in the related art, when residual flux removal is manually performed while CALTI is turned on, the screen of CALTI is slack, causing a visual confusion of the user. . In order to overcome this problem, the present invention, when the residual flux removal is manually performed by the user in the state that the CRT is turned on, the control means such as a microcomputer recognizes that the residual flux removal is performed, so that the screen of the CRT By making it black, the user's visual confusion can be prevented.