Patent ID: 11886140
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. An image forming apparatus that forms an image on a sheet, comprising:
a developing unit which includes a container containing a developer, and which is configured to form an image with use of the developer in the container;
a sensor configured to detect the developer in the container;
an acquisition unit configured to acquire maintenance information about maintenance work performed on the image forming apparatus;
a memory configured to store detection information about a detection result of the sensor; and
a controller configured to:
determine, from a plurality of pieces of detection information stored in the memory, based on the maintenance information acquired by the acquisition unit, first detection information about a detection result of the sensor that is detected during the maintenance work;
determine whether a failure has occurred in the developing unit based on second detection information obtained by excluding the first detection information from the plurality of pieces of detection information stored in the memory of the image forming apparatus; and
output a result of the determination of the failure.