| 摘要 |
PROBLEM TO BE SOLVED: To test effectively the turning on and off of an ordinary symbol dis play, a special symbol storage and display and an ordinary symbol storage and display. SOLUTION: A 7-segment LED constituting an ordinary symbol display is driven by the amplifier of an output circuit 573a that amplifies a signal outputted from an output port 571a. The LEDs of a start winning storage and display, and an ordinary storage and display are drived by the amplifier of an output circuit 573b that amplified a signal outputted from an output port 571b. Signals outputted to output ports 571a and 571b from the output ports 571a and 571b are outputted also to a test signal output circuit 71. |
