| 摘要 |
PROBLEM TO BE SOLVED: To prevent spot burning of a CRT(cathode-ray tube), even if the power supply of a device is inputted with a deflection yoke connector left forgotten uninserted. SOLUTION: This CRT display 1 stops the drive of a high pressure generating means 5, when the duty of a flyback pulse is an upper limit value or more and starts the drive when it is less than the upper limit value. Also, it stops the drive of the means 5, when the both end voltages of an S condenser is less than an upper limit value and starts the drive, when they are the upper limit value or more. Further, it notifies an operator that a deflection yoke connector has been forgotten and left uninserted. |
