Image processing apparatus

An image processing apparatus, comprising:

• a movable member relating to an imaging process;
• a solenoid configured to change an attitude of the movable member by receiving an operation current from a power supply;
• a power supply switch element that is a semiconductor element electrically connected in series with the solenoid, and is configured to conduct the operation current upon receiving a control signal in an active state, and cut off the operation current upon receiving the control signal in a negative state;
• a control device configured to, when switching the attitude of the movable member, continuously output the control signal in the active state to the power supply switch element for a predetermined reference time period and then return the control signal to the negative state;
• a current value integrator circuit configured to output an integral signal that increases in level in response to an integral value of the operation current when the operation current is conducted to the solenoid, and decreases in level when the operation current is cut off from the solenoid;
• a state determination circuit configured to output a state determination signal in a negative state when the level of the integral signal does not exceed a predetermined maximum level, and to maintain the state determination signal in an active state when the level of the integral signal exceeds the maximum level;
• and
• a cut-off circuit configured to conduct the operation current when the determination signal in the negative state is input to a power supply line that extends between the power supply and a circuit between the power supply switch element and the solenoid, and to cut off the operation current when the determination signal in the active state is input to the power supply line, wherein
• the maximum level is higher than the level of the integral signal of when the operation current is continuously conducted, for the reference time period, to the power supply switch element and the solenoid that are functioning normally.