| 摘要 |
PURPOSE: A circuit for preventing a screen shake in screen erase is provided to make a microcomputer output a low signal to an eraser operation output terminal according to an erase operation input signal to turn off the drive of a relay, and to supply alternating current(AC) to an erase coil to erase the screen. CONSTITUTION: A user inputs an erase operation signal to an eraser operation input terminal(D) to operate an erase key. A microcomputer(10) outputs a low signal to an eraser operation output terminal(A) by the inputted erase operation signal. A transistor(TR) is turned off by the low signal. A relay(20) flows AC to an erase coil(2) and a thermistor(30) by the turnoff of the transistor(TR). |
