Abstract: Disclosed is an auxiliary power source circuit having an ultra-low standby power consumption, including a transformer, a PWM control chip, a battery power source, a first switch tube, a voltage division adjustment module, adjustment modules, and a control module. The control module selects an under-charge voltage of the battery on the basis of the minimum under-charge voltage of the battery and a power source voltage of the battery. Module parameters of the adjustment modules are adjusted, such that the power supply time of the control module can last until a power supply voltage of the PWM control chip is dropped. Therefore, an auxiliary power source circuit can be prevented from frequently performing self-start-up, thereby truly reducing the standby power consumption of a system and greatly reducing the current loss.

Abstract: A power supply apparatus generates an output voltage. A boost circuit boosts a voltage supplied from a reference voltage source and generates a first power supply voltage. A processor controls switching the boost circuit on and off. A first transistor is connected to the first power supply voltage. A second transistor is connected to a collector of the first transistor. A resistance element is connected to a collector of the second transistor. A voltage source is connected to the resistance element and generates a second power supply voltage. A collector voltage, which is an output voltage, of the second transistor is controlled by controlling an amount of base current of the first transistor.

Abstract: An image forming apparatus includes an image forming unit, a first rotary member, a second rotary member, a web, a feed roller, a winding roller, a contact member, a detection unit, and a control unit. In a state where the apparatus is turned from a first power-ON state to a second power-ON state through a power-OFF state after the contact member reached a notch, if a difference between a diameter of a web at an end of the first power-ON state and the diameter of the web at a start of the second power-ON state is equal to or greater than a predetermined value, the control unit controls the image forming unit not to form a toner image. In the state after the contact member reached the notch, if the difference is smaller than the predetermined value, the control unit permits the image forming unit to form a toner image.

Abstract: A fixing device includes a cylinder, a heater, a contact body, and a soaking member. The heater has a first surface and an opposing second surface. The heater includes a heating element extending along a longitudinal direction of the heater. The first surface engages with an inner surface of the cylinder. The contact body is configured to engage with the inner surface of the cylinder. The contact body is configured to be heated at a first position along the longitudinal direction at a first temperature increase rate and at a second position along the longitudinal direction at a second temperature increase rate that is lower than the first temperature increase rate. The soaking member is positioned to engage with the opposing second surface of the heater. The soaking member has a second thermal capacity lower than a first thermal capacity at the respective second and first positions.

Abstract: A controller obtains a first duty cycle of a first current to be supplied to a first heater and a second duty cycle of a second current to be supplied to a second heater and controls the first switch and the second switch after the reduction control period, such that the temperature of a fixing unit maintains a target temperature for fixing the image by the fixing unit.

Abstract: A post-processing apparatus to perform a post-processing for a sheet conveyed from an image forming apparatus includes a punching unit, first and second motors, and a control unit. The punching unit includes a punch that is rotated by the first motor to punch the sheet, and a moving unit moved by the second motor to move the punch in a width direction intersecting with a sheet conveying direction. The control unit controls at least the first motor. In a first section from a first position in which the punch starts punching the sheet to a second position in which the punching ends, the control unit sets a current value for driving the first motor to a first current value. In a second section other than the first section, the control unit can set the first motor driving current value to a second current value lower than the first current value.

Abstract: An image forming apparatus connected to a user terminal includes: an apparatus side connecting part; a connection detecting part; an apparatus side mode switching part; and an apparatus side mode setting part. The apparatus side connecting part connects to the user terminal and outputs connection information. The connection detecting part detects whether or not the apparatus side connecting part is connected to the user terminal based on the connection information and outputs detection information. The apparatus side mode switching part outputs, based on the detection information, mode information indicating a mode to which a consumption amount of a resource consumed by the image forming apparatus is allocated. The apparatus side mode setting part sets, based on the mode information, an energy saving mode in which the consumption amount is reduced as compared with the consumption amount when the apparatus side connecting part and the user terminal are connected.

Abstract: A synchronous rectifier control circuit, used with a synchronous rectification circuit having a primary switch and a synchronous rectifier, having: a drain-source threshold setting circuit, configured to provide a dynamic drain-source voltage threshold based on a drain-source voltage across the synchronous rectifier; a primary switch detecting circuit, configured to provide a primary switch state indicating signal based on a comparison result of the drain-source voltage and the dynamic drain-source voltage threshold; and an on-control circuit, configured to provide a synchronous on signal to turn on the synchronous rectifier when the drain-source voltage decreases to the turn-on threshold, on the premise that the primary switch state indicating signal indicates an on state of the primary switch.

Abstract: An image-forming apparatus includes: a housing having an opening; a top cover configured to cover the opening; a short-range wireless communication circuit board attached to the top cover; a relay circuit board attached to the top cover; and a first wiring connecting the short-range wireless communication circuit board and the relay circuit board to each other. The short-range wireless communication circuit board includes: an antenna configured to transmit/receive radio waves; and a circuit electrically connected to the antenna. At least a part of the circuit and at least a part of the relay circuit board are overlapped with each other in an up-down direction.

Abstract: A fixing device includes a fixing roller and a pressure roller provided in a rotatable manner, a heat source for heating the fixing roller, and a controller for controlling AC power supplied to the heat source. The fixing device fixes an unfixed image on a sheet held and conveyed by the fixing roller and the pressure roller. The controller causes a current to flow including current-carrying waveforms having different phase angles in half-wave units during preset control cycles.

Abstract: An image forming apparatus includes an image forming unit and a power device. The power device includes a circuit board provided to intersect a horizontal plane. The power device includes an electrolytic capacitor, an electric element, and a plate-shaped member that is provided between the electrolytic capacitor and the electric element in a vertical direction and including a first surface extending in a second direction intersecting the vertical direction. The plate-shaped member includes a cutout or a hole, and a position of at least part of an area where the cutout or the hole is formed is farther in the first direction from the mounting surface of the circuit board than a position of the electric element.

Abstract: The present invention relates to a method for activating at least one sensor among a plurality of sensors embedded in a multi-unit device, said at least one sensor being configured to detect attacks during an execution by said multi-unit device of a software code comprising computer code instructions, wherein: said multi-unit device comprises at least two code execution units and a sensor activation circuit, and each sensor is associated to one code execution unit, and said method comprising, performed by said sensor activation circuit before execution of a computer code instruction of said software code by one of said code execution units: —determining (S1) the code execution unit configured to execute said instruction, —activating (S2) only the sensors associated with the determined code execution unit.

Abstract: A power supply apparatus generates an output voltage. A boost circuit boosts a voltage supplied from a reference voltage source and generates a first power supply voltage. A processor controls switching the boost circuit on and off. A first transistor is connected to the first power supply voltage. A second transistor is connected to a collector of the first transistor. A resistance element is connected to a collector of the second transistor. A voltage source is connected to the resistance element and generates a second power supply voltage. A collector voltage, which is an output voltage, of the second transistor is controlled by controlling an amount of base current of the first transistor.

Abstract: An image forming apparatus includes a transfer portion, a fixing portion to fix the toner image onto the sheet, and a charge adjusting portion. The charge adjusting portion adjusts charge to the sheet on which the toner image is fixed. The charge adjusting portion is provided with first and second rollers, a supplying rotatable member and a power source. The first roller includes a shaft having conductivity and an outer circumferential portion including an ion conductive material formed on an outer periphery of the shaft, and is electrically floating. The second roller is disposed so as to nip the sheet between itself and the first roller. The supplying rotatable member is in contact with the first roller and supplies a current to the first roller. The power source applies a voltage of one polarity of a positive polarity and a negative polarity to the supplying rotatable member.

Abstract: An image forming apparatus includes a first rotating member, a heater, a second rotating member, a detecting unit, a switching unit, a controlling unit, and a power source device. In a first period, a resultant current of first and third currents is supplied to a first heat generating element, and the resultant current in a unit cycle of a first period is a current at which a first current supplying timing and timings of a maximum and a minimum of the third current do not overlap with each other. In a second period, a resultant current of second and third currents is supplied to a second heat generating element, and the resultant current in a unit cycle of the second period is a current at which a second current supplying timing and the timings of the maximum and the minimum of the third current overlap with each other.

Abstract: An image forming apparatus includes a print engine which forms an image on a sheet; a high voltage power source substrate which applies output voltage to the print engine and which has a high voltage generating circuit for generating a high voltage by boosting inputted low voltage and a high voltage maintaining circuit for maintaining the high voltage at a predetermined value, the high voltage maintaining circuit being driven by the inputted low voltage; a low voltage power source which inputs the low voltage to the high voltage generating circuit and the high voltage maintaining circuit; and an ON/OFF circuit which switches whether or not the low voltage is inputted from the low voltage power source to the high voltage generating circuit and the high voltage maintaining circuit.

Abstract: An image forming apparatus including a developing unit with a developing container configured to contain a developer including a toner and a carrier, and configured to develop the electrostatic latent image by using the developer in the developing container. A sensor, which is provided on an outer wall of the developing container, is configured to output a pulse signal that changes in frequency depending on a toner concentration of the developer in the developing container. A controller is provided to control supply of the toner to the developing unit by detecting the toner concentration based on the time required for the pulse number to reach a predetermined count number.

Abstract: An image forming system comprises a first housing, a second housing and a third housing. The second housing may comprise a motor, a first door and a first switch. The first switch is provided on an electrical path connecting a power supply and the motor, for switching between a first state and a second state and for switching from the first state to the second state. The third housing may comprise a load. When the first door is opened in a state where the first switch is in the first state, the first switch switches from the first state to the second state to cause supply of electric power to the load to be cut off.

Abstract: A reusable media shell has a frame to hold sheets of media in an interior. A removable cap connects to the frame and its manipulation unveils the media for picking by an imaging device. The cap resides on a terminal end of the frame so the frame covers a majority of the media. A lift plate in the interior forces upward the sheets for picking. Two magnets on the frame magnetically secure the frame to magnets in a base of the imaging device and position the sheets in the base. Upstanding walls, a lid and bottom define the interior of the frame. Inserts attached to the walls allow adjustment to accommodate various sizes of the media.

Abstract: A motor control apparatus includes: a switching power supply; a first motor configured to operate with a voltage from the switching power supply; and a control unit configured to control the first motor, wherein the control unit is further configured to cause the switching power supply to supply power of the switching power supply to a load other than the first motor before detecting an initial position of a rotor of the first motor using a current flowing through the first motor.

Abstract: A heater includes a heat-resistant insulating substrate, a plurality of heat generating members arrayed in a first direction on a first surface of the substrate, and a plurality of heat radiating bodies disposed on a surface different from the first surface of the substrate at positions corresponding to gap portions between the heat generating members to passively radiate heat generated thereby.

Abstract: A power semiconductor device protection circuit includes: a drive circuit that drives a power semiconductor device; a current detector which includes a first resistor and an inductor connected in parallel; and a detection circuit that detects a short-circuit condition of the power semiconductor device. One end of the first resistor and one end of the inductor are connected to one terminal of the power semiconductor device. The detection circuit detects the short-circuit condition of the power semiconductor device by comparing a voltage of the one terminal of the power semiconductor device, which changes as a function of current flow through the first resistor and the inductor, with a short-circuit detection voltage. A reference potential of the drive circuit is connected to the other end of the first resistor and the other end of the inductor.

Abstract: A post-processing unit includes a stapler, a driving section, and a controller. The stapler is moved in a Y direction and executes a stapling process on a paper sheet. The driving section moves the stapler in the Y direction. The controller controls an operation of the stapler and an operation of the driving section. The controller executes first control to supply a set current or a set voltage to the driving section, second control to supply, to the driving section, the same supply current as the set current or the same supply voltage as the set voltage, and third control to stop the supply of the supply current or the supply voltage. When the stapler executes the stapling process a plurality of times, the controller repeatedly executes the second control and the third control and causes the stapler to execute the stapling process during the execution of the second control.

Abstract: An image formation apparatus includes a development unit, a circuit board, a conduction member, a coil spring, and a holding member. The development unit develops an electrostatic image formed on a photoconductive drum. The circuit board supplies a voltage to the development unit. The conduction member electrically connects the development unit and the circuit board. The coil spring includes a coil part in contact with the conduction member and an arm part of the coil spring provided integrally with the coil part and extending from an end of the coil part outward in a radial direction with respect to the coil part. The holding member includes a spring regulation part to regulate movement of the coil spring in the radial direction. The holding member holds the coil spring in contact with the conduction member. The arm part includes a hook portion to engage with a portion of the holding member.

Abstract: A post-process apparatus may include: a first operation portion that accepts a sheet conveyed from an image forming apparatus and performs a first operation based on a job involved with the sheet, a second operation portion that accepts a sheet manually inserted into the post-process apparatus and performs a second operation different from the first operation, and a control unit that determines timing to perform the second operation in accordance with a condition of the first operation performed.

Abstract: The present disclosure is directed to switch a voltage to be supplied to a power source switch in accordance with a state of a power source of an apparatus and restrain power consumption of the power source switch.

Abstract: A printer system includes a first apparatus including a first voltage source for converting an inputted AC voltage to a first DC voltage and for outputting the converted first DC voltage, and a first controller operable by a voltage based on the first DC voltage outputted from the first voltage source; and a second apparatus including a second voltage source for converting an inputted AC voltage to a second DC voltage and for outputting the converted second DC voltage, and a second controller operable by a voltage based on the first DC voltage outputted from the first voltage source. The second apparatus includes a first switching portion for switching a state thereof between a connection state in which the AC voltage is supplied to the second voltage source and a non-connection state in which supply of the AC voltage is cut off.

Abstract: The power supply apparatus including a high-voltage generation unit generating a DC voltage VA includes a Zener diode that drops the DC voltage VA to a DC voltage VB, a resistor connected to a line to which the DC voltage VA is output, and a voltage divider that generates a DC voltage VC by dividing the DC voltage VA with the resistor, and the voltage divider adjusts the DC voltage VC such that the potential difference between the DC voltage VB and the DC voltage VC is within a predetermined range.

Abstract: A high-voltage electrical circuit board is located in a first region that is a region at one side of photosensitive drums in a first direction and outside of the photosensitive drums in the first direction. A first motor drives a conveyance mechanism. A second motor is located in a second region and drives each photosensitive drum. A third motor is located in the second region and drives each developing roller to rotate and to drive a separation mechanism configured to individually move the developing rollers between a contact position and a separation position. A control board is located in the second region. The control board includes a controller configured to control a first applying circuit, the first motor, the second motor, and the third motor. The first motor, the second motor, the third motor, and the control board are located at different positions from one another in the second region.

Abstract: A high voltage power supply apparatus includes: a comparator, a transformer, a rectifier, and a detector. The comparator is to control output of a basic voltage. A high voltage based on the basic voltage is used to perform an image forming job in an image forming apparatus. The transformer is to output an alternating current voltage of a second side of the transformer by amplifying an alternating current voltage of a first side of the transformer, the amplifying being based on a resonance phenomenon induced from the basic voltage. The rectifier is to output the high voltage by rectifying the alternating current voltage of the second side. The detector is to sense a voltage applied to the comparator and a voltage applied to the transformer, and is to output operational state information of the high voltage power supply apparatus based on the sensed voltages.

Abstract: An image forming apparatus includes a detection unit configured to detect an object and a power-supply control unit. The power-supply control unit shifts the image forming apparatus to a second power state, in response to a lapse of a predetermined time following no detection of the object, when a job has not been executed until the detection unit detects no object, after the power-supply control unit shifts the image forming apparatus to the first power state. The power-supply control unit shifts the image forming apparatus to the second power state before a lapse of the predetermined time, when a job has been executed until the detection unit detects no object, after the power-supply control unit shifts the image forming apparatus to the first power state.

Abstract: A motor control apparatus includes: a switching power supply; a first motor configured to operate with a voltage from the switching power supply; and a control unit configured to control the first motor, wherein the control unit is further configured to cause the switching power supply to supply power of the switching power supply to a load other than the first motor before detecting an initial position of a rotor of the first motor using a current flowing through the first motor.

Abstract: A power control apparatus includes a voltage detection circuit configured to generate a voltage signal as an analog signal corresponding to a voltage value of AC power supplied from a commercial power supply to a predetermined load, and a current detection circuit configured to generate a current signal as an analog signal corresponding to a current value of the AC power. The power control apparatus further includes an A/D converter configured to convert each of the voltage signal and the current signal into a digital signal, a switch, a signal processor configured to control a switching operation of the switch based on a detection timing for the voltage value and a detection timing for the current value, and a controller configured to control supply of the AC power to the load.

Abstract: An LED driving circuit includes a power source, a first voltage stepping-down module, a constant current driving module, a second voltage stepping-down module, a DIP switch module, a control module and a loading module. The power source provides a source voltage. The first voltage stepping-down module reduces the source voltage's voltage level and correspondingly generates a first buck voltage. The second voltage stepping-down module reduces the first buck voltage's voltage level to generate a second buck voltage. The DIP switch module generates a maximal current indicating signal according to the second bulk voltage. The control module generates a PWM signal based on the second buck voltage and the maximal current indicating signal. The constant current driving module generates a drive current according to the first buck voltage and the PWM signal, and drives the loading module using the drive current.

Abstract: An image forming apparatus is operable in a first small-sheet printing mode in which power is supplied to a first heat generating element and a second heat generating element and in a second small-sheet printing mode in which power is supplied to the first heat generating element and a third heat generating element. A first power ratio, which is a proportion of power supplied to the first heat generating element to power supplied to the second heat generating element in the first small-sheet printing mode, is higher than a second power ratio, which is a proportion of power supplied to the first heat generating element to power supplied to the third heat generating element in the second small-sheet printing mode.

Abstract: An image forming apparatus includes: an image forming device; a fixing device including a fixing unit configured to fix a toner image to a recording sheet; a first AC receiving portion configured to receive power for the image forming device from an AC power source; a second AC receiving portion configured to receive power for the fixing device from the AC power source; a third AC receiving portion, which is removably connected to the image forming device, and is configured to receive power to be supplied to the fixing unit via the first AC receiving portion; and a connection detecting portion configured to detect whether power is supplied from the third AC receiving portion to the fixing device. The image forming device detects whether the third AC receiving portion is connected to the image forming device based on a detection result of the connection detecting portion.

Abstract: An image processing apparatus comprises a CPU for controlling the image processing apparatus and a microcomputer that verifies alteration of a program that is stored in a nonvolatile memory and that the CPU executes, and that outputs a notification signal that indicates the verification result. The image processing apparatus comprises a power source control unit for controlling a power source of the image processing apparatus, and the power source control unit, when the image processing apparatus is activated, supplies power to the microcomputer, and when a notification signal outputted from the microcomputer is received, holds the verification result that the notification signal indicates and shuts off the supply of power to the microcomputer.

Abstract: An imaging device includes a fuser having a heater connected to a power source via a switch. A controller generates a heater control signal for driving the heater without synchronizing the generation of the heater control signal with zero crossings of an AC voltage of the power source. The heater control signal changes between a first state indicating for the heater to be turned on and a second state indicating for the heater to be turned off. A trigger circuit receives the heater control signal and detects whether the AC voltage is within a predefined voltage span around zero volts. The trigger circuit generates a trigger signal for the switch when the AC voltage is within the predefined voltage span while the heater control signal is in the first state such that the switch causes current to pass through from the power source to the heater.

Abstract: An image forming apparatus includes a plurality of functions for forming an image, which are implemented by a power supply, a signal output unit, a control circuit, and a load operation unit operating in cooperation with one another. The load operation unit includes a sensor for detecting an abnormality. When the sensor has detected an abnormality, the image forming apparatus identifies a failure portion being a cause of the abnormality by checking failure portions of the power supply and the signal output unit, checking a failure portion of the control circuit when there is no failure portion in the power supply and the signal output unit, and checking a failure portion of the load operation unit when there is no failure portion in the control circuit.

Abstract: The image forming apparatus is characterized in that information about an input voltage detected on the primary side of a transformer is transmitted from a primary-side switching control unit to a secondary-side controller for controlling a heating device, and the controller controls the temperature of a heater of the heating device based on the transmitted information.

Abstract: During a period of a low power state, an image forming apparatus causes a system controller to stop an operation of a second power source and cut off voltage supply from a first power source to each of a power relay, an AC voltage detector, a fixing controller, and a printer controller. At a time of return from the low power state, the system controller starts the power supply from the first power source to each of the power relay, the AC voltage detector, the fixing controller, and the printer controller, and then activates the second power source.

Abstract: An imaging device includes a photoconductive drum charged by a charge roll and opposed by developer roll. The developer roll adds toner to the drum to develop a latent image on the drum for transfer to media. One or more high voltage power supplies communicate with a controller to set voltages on the rolls. The controller determines whether imaging of the media is to occur at a time when the drum is rotating. If not, a laser beam discharges the drum and the voltage on the charge roll is decreased to reduce the charge on the drum, but the controller maintains the voltage differential between the drum and the developer roll.

Abstract: The present invention provides a printing apparatus including a standby state and a power saving state in which power consumption is lower than in the standby state, the printing apparatus comprising: a control unit that integrally controls the apparatus; a plurality of engines for providing functions of the apparatus; and a power source control unit that controls power supply to the control unit and the plurality of engines in accordance with the standby state and the power saving state, wherein, when the apparatus is caused to transition to the standby state from the power saving state, the power source control unit controls power in the standby state after it is confirmed that the plurality of engines can return to the standby state.

Abstract: A communication device includes: a communication unit which receives control data; and a main control unit which controls an operation of the communication device, based on the control data received by the communication unit. The communication device operates in a first standby state where the main control unit stops at least a part of operations and where the communication unit detects only an access to a specific port that designates the communication device as a destination, and in a second standby state where the main control unit can execute the operations and controls the operation of the communication device, based on the control data. The communication unit wakes up the main control unit if an access to the specific port is detected in the first standby state.

Abstract: An image forming apparatus arranged to form an image on a recording material, the image forming apparatus includes a first and second object. A first urging member is provided between the electrically conductive wire, and arranged to urge towards the first object and to electrically couple the electrically conductive wire and the first object to each other. A second urging member is provided between the second object and the electrically conductive wire, and arranged to urge towards the second object and to electrically couple the electrically conductive wire and the second object to each other. The electrically conductive wire is formed of a material having an elastic coefficient that is lower than that of the first urging member and that of the second urging member.

Abstract: A controller controls a secondary transfer power source such that a current having a first value flows in a secondary transfer portion in a case where a transfer material with an image formed on a first surface thereof has been conveyed for less than a predetermined amount of time in a second conveyance path. Moreover, the controller controls the secondary transfer power source such that a current having a second value larger in absolute value than the first value flows in the secondary transfer portion in a case where the transfer material with an image formed on the first surface thereof is conveyed to the secondary transfer portion after waiting for the predetermined amount of time or more in the second conveyance path.

Abstract: There is provided method of controlling an electrically operated aerosol-generating system, including: receiving an input being a first request to adjust a first parameter of the system; comparing the input to a first range of allowable values for the first parameter; providing an authorizing signal indicating that the input is within the range of allowable values for the first parameter; determining an adjustment to a second range of allowable values for a second parameter, which is dependent on the first parameter, and in dependence on the input; and adjusting the first parameter and the second range of allowable values for the second parameter, in dependence on the authorizing signal. There is also provided an electrically operated aerosol-generating device and an electrically operated aerosol-generating system.

Abstract: A display device includes: a display panel; a power management circuit configured to: perform a short detection operation with a first short detection condition during a start-up operation; supply first and second power supply voltages in the normal mode; and stop supplying the first and second power supply voltages in the low power mode; and a display driver configured to provide a first image signal in the normal mode and a second image signal for in the low power mode, the display driver comprising a power block configured to supply first and second standby power supply voltages in the low power mode, wherein, in a transition frame between the low power mode and the normal mode, the display driver provides the second image signal for the standby image to the display panel, and the power management circuit performs the short detection operation with a second short detection condition.

Abstract: A fixing device to fix a toner image on a recording paper while transporting the recording paper bearing the toner image through a nip portion includes a first rotator, a second rotator, a heating unit, a temperature measuring element, a control unit, and a voltage applying unit. The second rotator forms the nip portion together with the first rotator. The heating unit heats the first rotator. The temperature measuring element measures temperature of the first rotator or the heating unit. The control unit controls power supplied to the heating unit in accordance with the temperature measured by the temperature measuring element. The voltage applying unit applies voltage to the second rotator. The second rotator includes a conductive layer having an attribute of changing resistance depending on temperature. The fixing device measures temperature of the second rotator by measuring the resistance of the conductive layer of the second rotator.

Abstract: A controller, which is a high-voltage power supply apparatus, includes: a secondary transfer high-voltage output device including a first high-voltage generator, which is configured to generate a first voltage having a positive voltage value, and a second high-voltage generator, which is connected in series to the first high-voltage generator, and is configured to generate a second voltage, the secondary transfer high-voltage output device being configured to output an output voltage, which is a sum of the first voltage and the second voltage; and a secondary transfer high-voltage control device, which is configured, in a case where the high-voltage power supply apparatus is switched from a state in which the first high-voltage generator is driven to output a first target voltage as the output voltage, to a state in which a second target voltage is output as the output voltage, to perform feedback control on the second voltage.