| 摘要 |
PROBLEM TO BE SOLVED: To turn the power to a system off safely without placing the system into an abnormal state, even when a microcomputer for power supply sequence control falls into an abnormal state.SOLUTION: An image formation device 1, equipped with a plurality of power supply systems, comprises: a sequence control microcomputer 102 for outputting a power supply control signal to start and stop each of the plurality of power supply systems in order; a power supply on/off control circuit 104 for individually starting and stopping each of the plurality of power supply systems in accordance with each power supply control signal given; a buffer circuit 103 for conveying the power supply control signal outputted from the sequence control microcomputer 102 to the power supply on/off control circuit 104; and a main control unit 101 for switching the buffer circuit 103 to a state in which the power supply control signal is not conveyed to the power supply on/off control circuit 104 after the plurality of power supply systems are started by the output of the power supply control signal from the sequence control microcomputer 102.SELECTED DRAWING: Figure 3 |
