| 摘要 |
PURPOSE:To enable trouble classification display with a simple constitution, by utilizing the CPU output terminal to be turned off on detection of troubles. CONSTITUTION:Output terminal 10 of CPU 100 is used as a trouble detection output terminal of a signal for producing warning buzzer sound, and output termnals 11-14 are used as output ports for controlling a copying process and for displaying trouble classification. When a detection signal is provided from terminal 10, buzzer drive circuit 21 acts to send logical signal 1 to AND circuits A5-A8, lighting circuit 26-29 act by output signals from terminals 11-14, and the panel on which trouble characters are displayed is illuminated for indication. |
