Abstract: A sensor control apparatus includes a control unit, a plurality of sensors connected in series to the control unit. Each of the plurality of sensors includes a detector configured to perform a detection operation based on a first voltage applied from the control unit, a first switch provided on an application path for applying a voltage, a second switch provided on a supply path for supplying the voltage applied from the control unit to a sensor connected in a subsequent stage, and a conduction control unit. The control unit brings the first switch into conduction and cut off the second switch in a case where the voltage on the application path is the first voltage, and cuts off the first switch and bring the second switch into conduction in a case where the voltage on the application path is a second voltage.

Abstract: A board includes a first motor driver control circuit, a first connector, and a second connector. The first motor driver control circuit includes a first H-bridge and a second H-bridge. The first connector includes at least the following: a first pin to which a first output of the first H-bridge is input, a second pin to which a second output of the first H-bridge is input, and a third pin. The second connector is disposed apart from the first connector and includes at least the following: a first pin to which a first output of the second H-bridge is input, a second pin to which a second output of the second H-bridge is input, and a third pin of the second connector.

Abstract: Provided is a sensor control apparatus including a main board, a first sensor, a second sensor, and a third sensor, which are connected in series to the main board. The first sensor includes a diagnosis unit configured to perform a failure diagnosis of each of an LED, a phototransistor, and an LED controller. In a case where a failure is detected, the diagnosis unit electrically isolates the first sensor from the series connection, and supplies a power supply voltage to the second sensor.

Abstract: A board a motor driver control circuit, a first connector, a first wire, a second wire, a third wire, a fourth wire, a fifth wire, and a sixth wire. The motor driver control circuit includes a first H-bridge and a second H-bridge. The first connector is a connector to which an output from the first H-bridge and an output from the second H-bridge are input. The first wire and the second wire input the output from the first H-bridge to the first connector. The third wire and the fourth wire input the output from the second H-bridge to the first connector. The fifth wire is connected to the first wire and outputs the first H-bridge output to another connector. The sixth wire is connected to the second wire and outputs the first H-bridge output to the other connector.

Abstract: A board includes a first motor driver control circuit, a first connector, and a second connector. The first motor driver control circuit includes a first H-bridge and a second H-bridge. The first connector includes at least the following: a first pin to which a first output of the first H-bridge is input, a second pin to which a second output of the first H-bridge is input, and a third pin. The second connector is disposed apart from the first connector and includes at least the following: a first pin to which a first output of the second H-bridge is input, a second pin to which a second output of the second H-bridge is input, and a third pin of the second connector.

Abstract: A board a motor driver control circuit, a first connector, a first wire, a second wire, a third wire, a fourth wire, a fifth wire, and a sixth wire. The motor driver control circuit includes a first H-bridge and a second H-bridge. The first connector is a connector to which an output from the first H-bridge and an output from the second H-bridge are input. The first wire and the second wire input the output from the first H-bridge to the first connector. The third wire and the fourth wire input the output from the second H-bridge to the first connector. The fifth wire is connected to the first wire and outputs the first H-bridge output to another connector. The sixth wire is connected to the second wire and outputs the first H-bridge output to the other connector.

Abstract: Provided is a sensor control apparatus including a main board, a first sensor, a second sensor, and a third sensor, which are connected in series to the main board. The first sensor includes a diagnosis unit configured to perform a failure diagnosis of each of an LED, a phototransistor, and an LED controller. In a case where a failure is detected, the diagnosis unit electrically isolates the first sensor from the series connection, and supplies a power supply voltage to the second sensor.

Abstract: A sensor control apparatus includes a control unit, a plurality of sensors connected in series to the control unit. Each of the plurality of sensors includes a detector configured to perform a detection operation based on a first voltage applied from the control unit, a first switch provided on an application path for applying a voltage, a second switch provided on a supply path for supplying the voltage applied from the control unit to a sensor connected in a subsequent stage, and a conduction control unit. The control unit brings the first switch into conduction and cut off the second switch in a case where the voltage on the application path is the first voltage, and cuts off the first switch and bring the second switch into conduction in a case where the voltage on the application path is a second voltage.

Abstract: An image forming apparatus which can control to turn on/off a light emitting element depending on a sheet state on a manual sheet tray is provided. The image forming apparatus includes the manual feed tray on which the sheet is placed. The image forming apparatus is configured to be switchable between normal power mode and power saving mode. In the normal power mode, normal power is supplied. In the power saving mode, less power is consumed as compared to the power consumed in the normal power mode. The image forming apparatus includes a manual sheet feeding sensor which detects presence/absence of the sheet on the manual feed tray. The image forming apparatus includes a sheet length sensor S and a sheet length sensor L which include the light emitting element and a light receiving element to detect approximate sheet length of sheet placed on the manual feed tray in a conveying direction.

Abstract: An image forming apparatus includes an image forming portion; a discharge portion configured to discharge a recording material on which an image is formed by the image forming portion, wherein a delivery conveyance portion having a power source circuit is mountable in a space adjacent to the image forming portion and configured to convey the recording material to a post-processing apparatus; a detection unit configured to detect a temperature; a cooling unit configured to cool the image forming portion; and a control unit configured to control, in a case where the delivery conveyance portion is mounted, rotation of the cooling unit based on the temperature detected by the detection unit in a standby state in which an image forming operation is not performed.

Abstract: A sheet feeding apparatus includes a stacking member, an optical sensor, a detected member, and a control unit. As an amount of sheets stacked on the stacking member decreases, the detected member moves from a first position in which optical sensor light is not interrupted, then once interrupts the light, and then moves to a second position in which the light is not interrupted. Information regarding an amount of sheets transmitted by the control unit, when stored information is about the detected member in the second position, is information notifying that an amount of sheets stacked on the stacking member is less than that of information regarding an amount of sheets stacked on the stacking member transmitted by the control unit when stored information is about the detected member is in the first position.

Abstract: An image forming apparatus, including: an image forming portion; a discharge portion configured to discharge a recording material on which an image is formed by the image forming portion, wherein a delivery conveyance portion having a power source circuit is mountable in a space adjacent to the image forming portion and configured to convey the recording material to a post-processing apparatus; a detection unit configured to detect a temperature; a cooling unit configured to cool the image forming portion; and a control unit configured to control, in a case where the delivery conveyance portion is mounted, rotation and stop of the cooling unit based on the temperature detected by the detection unit in a second state in which start of an operation of forming the image is waited for after a first state in which the image is formed on the recording material by the image forming portion.

Abstract: An image forming apparatus which can control to turn on/off a light emitting element depending on a sheet state on a manual sheet tray is provided. The image forming apparatus includes the manual feed tray on which the sheet is placed. The image forming apparatus is configured to be switchable between normal power mode and power saving mode. In the normal power mode, normal power is supplied. In the power saving mode, less power is consumed as compared to the power consumed in the normal power mode. The image forming apparatus includes a manual sheet feeding sensor which detects presence/absence of the sheet on the manual feed tray. The image forming apparatus includes a sheet length sensor S and a sheet length sensor L which include the light emitting element and a light receiving element to detect approximate sheet length of sheet placed on the manual feed tray in a conveying direction.

Abstract: An image forming apparatus including: a reading device; an operating portion; a light source; a rotary polygon mirror; a motor configured to rotate the rotary polygon mirror; and a motor control portion configured to start the motor to control the motor at a first rotation speed in response to a fact that a predetermined action is performed on one of the operating portion and the reading device in a stopped state of the rotary polygon mirror, and then to control the motor at a second rotation speed higher than the first rotation speed in response to an instruction to start image formation from the operating portion, the motor control portion being configured to control the motor at the second rotation speed, without controlling the motor at the first rotation speed, in response to a fact that the receiving portion receives image data before the motor reaches the first rotation speed.

Abstract: An image forming unit forms a toner image on an image carrier, and transfers the toner image to a recording medium. A voltage generation circuit generates a high voltage used for the image forming unit. A control circuit is connected to the voltage generation circuit via a cable, and controls the high voltage generated by the voltage generation circuit. A detection unit detects a current flowing in a load of the image forming unit to which the high voltage generated by the voltage generation circuit is applied. A determination unit determines an error in accordance with a current range in which the current detected by the detection unit falls. The current range is included among a plurality of current ranges that are in one-to-one correspondence with a plurality of errors.

Abstract: An image forming apparatus which can control to turn on/off a light emitting element depending on a sheet state on a manual sheet tray is provided. The image forming apparatus includes the manual feed tray on which the sheet is placed. The image forming apparatus is configured to be switchable between normal power mode and power saving mode. In the normal power mode, normal power is supplied. In the power saving mode, less power is consumed as compared to the power consumed in the normal power mode. The image forming apparatus includes a manual sheet feeding sensor which detects presence/absence of the sheet on the manual feed tray. The image forming apparatus includes a sheet length sensor S and a sheet length sensor L which include the light emitting element and a light receiving element to detect approximate sheet length of sheet placed on the manual feed tray in a conveying direction.

Abstract: An image forming unit forms a toner image on an image carrier, and transfers the toner image to a recording medium. A voltage generation circuit generates a high voltage used for the image forming unit. A control circuit is connected to the voltage generation circuit via a cable, and controls the high voltage generated by the voltage generation circuit. A detection unit detects a current flowing in a load of the image forming unit to which the high voltage generated by the voltage generation circuit is applied. A determination unit determines an error in accordance with a current range in which the current detected by the detection unit falls. The current range is included among a plurality of current ranges that are in one-to-one correspondence with a plurality of errors.

Abstract: An image forming apparatus which can control to turn on/off the light emitting element depending on a sheet state on a manual sheet tray is provided. The image forming apparatus includes the manual feed tray on which sheet is placed. The image forming apparatus is configured to be switchable between normal power mode and power saving mode. In the normal power mode, normal power is supplied. In the power saving mode, less power is consumed as compared to the power consumed in the normal power mode. The image forming apparatus includes a manual sheet feeding sensor which detects presence/absence of the sheet on the manual feed tray. The image forming apparatus includes a sheet length sensor S and a sheet length sensor L which include light emitting element and light receiving element to detect approximate sheet length of sheet placed on the manual feed tray in a conveying direction.

Abstract: An image forming apparatus including: a reading device; an operating portion; a light source; a rotary polygon mirror; a motor configured to rotate the rotary polygon mirror; and a motor control portion configured to start the motor to control the motor at a first rotation speed in response to a fact that a predetermined action is performed on one of the operating portion and the reading device in a stopped state of the rotary polygon mirror, and then to control the motor at a second rotation speed higher than the first rotation speed in response to an instruction to start image formation from the operating portion, the motor control portion being configured to control the motor at the second rotation speed, without controlling the motor at the first rotation speed, in response to a fact that the receiving portion receives image data before the motor reaches the first rotation speed.

Abstract: A sheet feeding apparatus includes a stacking member, an optical sensor, a detected member, and a control unit. As an amount of sheets stacked on the stacking member decreases, the detected member moves from a first position in which optical sensor light is not interrupted, then once interrupts the light, and then moves to a second position in which the light is not interrupted. Information regarding an amount of sheets transmitted by the control unit, when stored information is about the detected member in the second position, is information notifying that an amount of sheets stacked on the stacking member is less than that of information regarding an amount of sheets stacked on the stacking member transmitted by the control unit when stored information is about the detected member is in the first position.