Endoscope with first and second voltage comparing portions

An endoscope, comprising:

• an image pickup device that is mounted in a distal end portion of an insertion portion;
• wiring that transmits a power supply having a plurality of different power supply voltages for driving the image pickup device, a drive signal that drives the image pickup device, an image pickup signal that is outputted from the image pickup device that is driven by the drive signal, and a ground level;
• a substrate on which a connector that relays the wiring is provided;
• a first voltage comparing portion that compares the plurality of different power supply voltages;
• a power supply generation portion that, based on the plurality of different power supply voltages, generates a plurality of second power supply voltages that are respectively different from the plurality of different power supply voltages;
• a second voltage comparing portion that compares the plurality of second power supply voltages;
• and
• a power supply control portion that controls a supply of power to the image pickup device based on a comparison result of the first voltage comparing portion and a comparison result of the second voltage comparing portion, wherein
• the first voltage comparing portion is provided on the substrate, and the first voltage comparing portion outputs a comparison result regarding whether or not each power supply voltage is within a normal voltage range by comparing the plurality of power supply voltages and respective predetermined threshold values, and
• the power supply control portion is provided on the substrate, and the power supply control portion controls so as to supply power to the image pickup device in a case where the comparison result of the first voltage comparing portion is within the normal voltage range, and controls so as to stop supply of power to the image pickup device in a case where the comparison result of the first voltage comparing portion is outside the normal voltage range.