An example image forming apparatus includes a coupling device to perform coupling or decoupling between the image forming apparatus and a consumable, a sensor to sense an opening of a cover of the image forming apparatus, and a processor. When receiving an opening sensing signal of the cover from the sensor, the processor determines whether the consumable coupled to the image forming apparatus corresponds to a consumable access condition, and based on a result of determination, transmits a signal requesting decoupling of the consumable corresponding to the consumable access condition to the coupling device.

An image forming apparatus includes: a feed tray that contains printing paper therein; a user authentication unit that authenticates a user who is permitted to print; a paper loading detection unit that detects printing paper loaded into the feed tray; a memory device that stores a user authenticated as a paper-supplementing user; a paper feeding mechanism that feeds the printing paper from the feed tray; a paper jam detection unit that detects a paper jam; and a controller that controls a print job. The controller, when a paper jam has occurred, determines whether or not the paper jam is due to the paper-supplementing user having loaded the printing paper in an improper manner. Upon determining that the paper jam is due to the paper-supplementing user having loaded the printing paper in an improper manner, the controller, subsequently when the paper-supplementing user uses, requests that a loading condition be checked.

In an image forming apparatus, a consumable is mounted in the main casing. The consumable includes a consumable memory. A controller performs a consumable determination process to determine based on type information stored in a consumable memory whether the consumable mounted in the main casing is a special consumable. The controller performs a transmission process in a case where the consumable determination process determines that the consumable mounted in the main casing is the special consumable. The transmission process transmits via the communication interface a request to an external device which communicates with the image forming apparatus. The request is to cancel an agreement which is concluded for another image forming apparatus as a contract subject. The another image forming apparatus is different from the image forming apparatus.

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.

An image forming apparatus includes a main body that includes a photosensitive member on which an electrostatic latent image is formed and a development unit configured to develop the photosensitive member with toner. The main body is configured to discharge a recording material on which an image is formed with the toner onto a discharge tray. The image forming apparatus also includes a toner supply port on which a supply container is mounted to supply toner to a toner containing portion of the development unit. The image forming apparatus further includes a non-contact communication portion including an antenna and configured to receive a signal for user authentication. The discharge tray, the toner supply port, and the non-contact communication portion are provided at an upper portion of the main body. The non-contact communication portion is provided outside the discharge tray when the main body is viewed from above.

A printing system includes a printing unit, an operation unit, and a control unit. The printing unit prints an image on a sheet, conveys the sheet to a reading unit, and performs adjustment for printing an image on the sheet based on an image read by the reading unit. The control unit performs an operation of controlling to execute a manual adjustment function for adjusting predetermined adjustment items based on adjustment values received via the operation unit after authentication of an operator. The control unit performs another operation of controlling to execute an automatic adjustment function for adjusting the predetermined adjustment items based on the image read by the reading unit without the authentication of the operator.

An image forming apparatus includes a main body that includes a photosensitive member on which an electrostatic latent image is formed and a development unit configured to develop the photosensitive member with toner. The main body is configured to discharge a recording material on which an image is formed with the toner onto a discharge tray. The image forming apparatus also includes a toner supply port on which a supply container is mounted to supply toner to a toner containing portion of the development unit. The image forming apparatus further includes a non-contact communication portion including an antenna and configured to receive a signal for user authentication. The discharge tray, the toner supply port, and the non-contact communication portion are provided at an upper portion of the main body. The non-contact communication portion is provided outside the discharge tray when the main body is viewed from above.

An image forming apparatus includes a stacking unit, a pickup roller, a motor having a winding, a rotor, and a phase, an image forming unit, an operation unit, and a receiving unit. The motor drives the pickup roller to feed a recording medium stacked on the stacking unit. The image forming unit forms an image on the fed medium. A user operates the operation unit to set an image forming condition. When, in a state where the winding is not excited, the operation unit is operated before the receiving unit receives an instruction to start forming the image, an initial operation is executed in a rotor stop state that supplies current to the winding and determines the motor phase based on the current flowing through the winding. When the instruction is received after the initial operation, the winding receives current such that the rotor rotates based on the determined phase.

The authentication device holds first data and second data, the first data to authenticate the authentication target device of a version from a first version same as the authentication device to a second version newer than the first version, the second data to authenticate the authentication target device of a version newer than the second version. The authentication target device holds a plurality pieces of first target data and second target data, the plurality pieces of first target data corresponding to each of versions from a third version same as the authentication target device to a fourth version older than the third version, one second target data corresponding to each of versions from a fifth version to a sixth version, the fifth version being older than the fourth version by one version, the sixth version being older than the fifth version.

In an image forming apparatus, a consumable is mounted in the main casing. The consumable includes a consumable memory. A controller performs a consumable determination process to determine based on type information stored in a consumable memory whether the consumable mounted in the main casing is a special consumable. The controller performs a transmission process in a case where the consumable determination process determines that the consumable mounted in the main casing is the special consumable. The transmission process transmits via the communication interface a request to an external device which communicates with the image forming apparatus. The request is to cancel an agreement which is concluded for another image forming apparatus as a contract subject. The another image forming apparatus is different from the image forming apparatus.