Abstract: An image forming system includes an information processing apparatus configured to output, to an image forming apparatus, information about an image forming job to form an image on a recording medium, the image forming apparatus being configured to be operable in a plurality of power modes including a normal power mode in which the information is output and a power saving mode in which power consumption is less than the normal power mode; an image forming apparatus includes a storage unit configured to store the information about two or more image forming jobs output from the information processing apparatus; and an image forming unit configured to form an image on the recording medium based on the information stored in the storage unit.

Abstract: An image forming unit forms test images of a color of the same type as a first color using toner of a second color and toner of a third color, transfers first and second test images, fixes the test images on a sheet, controls a sensor to read the test images, determines sampling timings for the test images based on an output signal related to the first test image outputted from the sensor using a color filter of a fourth color, acquires a result of reading the test images based on a reading result of the test images on the sheet by the color sensor using a color filter of the first color and the sampling timing, and determines a transfer voltage based on the result of reading the test images.

Abstract: An image forming system includes an image forming unit, a sensor, and a controller. The controller is configured to control the sensor based on measurement modes including a first measurement mode and a second measurement mode. A sampling number of an image by the sensor while the sensor moves in the direction orthogonal to the conveying direction in the first measurement mode is less than a sampling number of an image by the sensor while the sensor moves in the direction orthogonal to the conveying direction in the second measurement mode.

Abstract: An image forming system may comprises an image forming unit, a sensor, and a controller. The controller configured to control the sensor based on measurement modes including a first measurement mode and a second measurement mode. A sampling number of an image by the sensor while the sensor moves in the direction orthogonal to the conveying direction in the first measurement mode is less than a sampling number of an image by the sensor while the sensor moves in the direction orthogonal to the conveying direction in the second measurement mode.

Abstract: An image forming unit forms test images of a color of the same type as a first color using toner of a second color and toner of a third color, transfers a first and second test images, fixes the test images on a sheet, controls a sensor to read test images, determines sampling timings for the test images based on an output signal related to the first test image outputted from the sensor using a color filter of a fourth color, acquires a result of reading the test images based on a reading result of the test images on the sheet by the color sensor using a color filter of the first color, and the sampling timing, and determines a transfer voltage based on the result of reading the test images.

Abstract: An image forming apparatus includes an image forming unit configured to form an image using developer, a mount section on which a container containing the developer is mounted, a drive mechanism that includes a motor that rotates to supply the developer to the image forming unit from the container mounted on the mount section, and a controller configured to obtain an output value related to a load of the motor while rotating the motor without mounting the container on the mount section after the container is detached from the mount section, and detect a failure of the container detached from the mount section based on the output value.

Abstract: The image forming apparatus includes the power supply board for generating a +24V power supply voltage and a driver board for driving a load for forming an image, and an engine control board for controlling an operation of a driver board. The driver board includes a fuse which receives the 24V power supply voltage supplied from the power supply board. The driver board drives the load by +24V_FU1 voltage output from the fuse. The engine control board identifies, when an abnormality occurs in an operation of the load, a board that is a cause of the abnormality according to a voltage value of the +24V_FU1 voltage and the voltage value of the power supply voltage.

Abstract: An image forming apparatus includes one or more processors, at least one of the one or more processors operating to: monitor an occurrence of an abnormality; identify, in a case where an abnormality is detected, a failed part that has caused the abnormality, a parent component including one or more child components, a notifier configured to notify failure information indicating a failed part that has caused an abnormality; and a storage configured to store display setting information indicating whether notification of failure information is performed in unit of a child component and in unit of a parent component. The at least one of the one or more processors operates to control, in a case where the display setting information is set so as to notify the failure information in unit of the parent component, when the failed part is a child component.

Abstract: An image forming apparatus includes one or more processors, at least one of the one or more processors operating to: monitor an occurrence of an abnormality; identify, in a case where an abnormality is detected, a failed part that has caused the abnormality, a parent component including one or more child components, a notifier configured to notify failure information indicating a failed part that has caused an abnormality; and a storage configured to store display setting information indicating whether notification of failure information is performed in unit of a child component and in unit of a parent component. The at least one of the one or more processors operates to control, in a case where the display setting information is set so as to notify the failure information in unit of the parent component, when the failed part is a child component.

Abstract: An image forming apparatus includes an image forming unit configured to form an image using developer, a mount section on which a container containing the developer is mounted, a drive mechanism that includes a motor that rotates to supply the developer to the image forming unit from the container mounted on the mount section, and a controller configured to obtain an output value related to a load of the motor while rotating the motor without mounting the container on the mount section after the container is detached from the mount section, and detect a failure of the container detached from the mount section based on the output value.

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 includes the power supply board for generating a +24V power supply voltage and a driver board for driving a load for forming an image, and an engine control board for controlling an operation of a driver board. The driver board includes a fuse which receives the 24V power supply voltage supplied from the power supply board. The driver board drives the load by +24V_FU1 voltage output from the fuse. The engine control board identifies, when an abnormality occurs in an operation of the load, a board that is a cause of the abnormality according to a voltage value of the +24V_FU1 voltage and the voltage value of the power supply voltage.

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: It is determined whether a performing condition for first welding detection is satisfied. If the performing condition for the first welding detection is satisfied, the first welding detection is performed. On the other hand, if the performing condition for the first welding detection is not satisfied, the first welding detection is skipped. The performing condition for the first welding detection is that second welding detection has detected welding of a relay. The first welding detection is performed before image formation is performed. The second welding detection is performed after image formation has ended.

Abstract: It is determined whether a performing condition for first welding detection is satisfied. If the performing condition for the first welding detection is satisfied, the first welding detection is performed. On the other hand, if the performing condition for the first welding detection is not satisfied, the first welding detection is skipped. The performing condition for the first welding detection is that second welding detection has detected welding of a relay. The first welding detection is performed before image formation is performed. The second welding detection is performed after image formation has ended.

Abstract: An image forming apparatus comprises a fixing device comprising a heater for heating a sheet on which an image is formed and a non-volatile memory in which characteristic information of the heater is stored. The fixing device is replaceable. In a case where the fixing device is replaced, the image forming apparatus starts to supply power to the heater before completing to read the characteristic information from the fixing device replaced. Due to this, the image forming apparatus can promptly heat the heater of the fixing device than before.

Abstract: An image forming apparatus including a motor for rotating a stirring member and a cleaner to which a driving force of the motor is transmitted via a transmission mechanism. In a buffer container of a toner replenishment device of a developing device, a gear connected to a restriction member for stirring toner in the buffer container and restricting toner from dropping into a toner conveying section and a cleaning member for cleaning the detection surface of a toner sensor are driven by a motor. A CPU controls a timing at which a clutch stops transmission of the driving force from the motor to the gear, based on a result of detection by a flag sensor that detects an amount of rotation of the gear, and a rotational speed of the motor.

Abstract: An image forming apparatus comprises a fixing device comprising a heater for heating a sheet on which an image is formed and a non-volatile memory in which characteristic information of the heater is stored. The fixing device is replaceable. In a case where the fixing device is replaced, the image forming apparatus starts to supply power to the heater before completing to read the characteristic information from the fixing device replaced. Due to this, the image forming apparatus can promptly heat the heater of the fixing device than before.

Abstract: An image forming apparatus including a motor for rotating a stirring member and a cleaner to which a driving force of the motor is transmitted via a transmission mechanism. In a buffer container of a toner replenishment device of a developing device, a gear connected to a restriction member for stirring toner in the buffer container and restricting toner from dropping into a toner conveying section and a cleaning member for cleaning the detection surface of a toner sensor are driven by a motor. A CPU controls a timing at which a clutch stops transmission of the driving force from the motor to the gear, based on a result of detection by a flag sensor that detects an amount of rotation of the gear, and a rotational speed of the motor.

Abstract: An image forming apparatus includes: a charging unit which charges a surface of an image bearing member by contacting the image bearing member with a charging member to which a charging bias is applied, the charging bias being a voltage obtained by superimposing an AC voltage on a DC voltage; an electrostatic latent image forming unit which forms an electrostatic latent image on the surface of the image bearing member which is charged by the charging unit; a developing unit which develops the electrostatic latent image by using a developing bias formed by the voltage obtained by superimposing the AC voltage on the DC voltage; and a control unit which performs changing control of an AC frequency of the charging bias while maintaining a frequency ratio of an AC frequency of the developing bias to be an integral multiple of the AC frequency of the charging bias.