Electronic apparatus and control method

A control method of an electronic apparatus:

• the electronic apparatus comprising;
• a power supply that supplies power;
• a driven unit that is driven by the power from the power supply;
• a dummy load that discharge the power supply;
• a switch that connects or disconnects the dummy load to or from the power supply;
• and
• a storage unit that associates and stores both a voltage of the power supply on which no load is imposed and a voltage of the power supply with its internal resistance being a highest allowable value and the dummy load being connected, the highest allowable value of the internal resistance being the highest internal resistance of the power supply that can drive the driven unit when no load is connected;
• a voltage measurement unit that measures voltage of the power supply;
• the control method comprising;
• comparing a first voltage and a second voltage, the first voltage, measured by the voltage measurement unit, being a voltage of the power supply with the dummy load being connected, and the second voltage being the voltage of the power supply with its internal resistance being the highest allowable value and the dummy load being connected and the second voltage being read from the storage unit according to a voltage, measured by the voltage measurement unit, of the power supply with no load being connected;
• determining whether the driven unit can be driven based on the comparison result;
• and
• driving the driven unit when it is determined that driving the driven unit is possible.

An electronic apparatus comprising:

• a power supply that supplies a first power;
• a communication unit that receives power from an external power supply and supplies the power as a second power;
• a driven unit that is driven by the first or the second power;
• a determination unit that determines, when the first power is not sufficient to drive the driven unit, if power is being supplied from the external power supply;
• and
• a drive prohibit unit that, when the first power is not sufficient to drive the driven unit and when the external power supply does not supply enough power to drive the driven unit, prohibits the driven unit from being driven.

A control method of an electronic apparatus:

• the electronic apparatus comprising;
• a power supply that supplies a first power;
• a communication unit that receives power from an external power supply and supplies the power as a second power;
• and
• a driven unit that is driven by the first or the second power;
• the control method comprising;
• determining if, when the first power is not sufficient to drive the driven unit, power is being supplied from the external power supply;
• and
• prohibiting, when the first power is not sufficient to drive the driven unit and when the external power supply does not supply enough power to drive the driven unit, the driven unit from being driven.