Patent ID: 11899387
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Computer technology (Electrical engineering)
Classification: CPC G  B | IPC G

Claim 17:
18. A non-transitory computer readable storage medium storing computer-readable instructions executed by a controller included in or provided outside an image-forming device, the image-forming device including: a frame; a drum cartridge detachably attached to the frame, the drum cartridge having a photosensitive drum; and a developing cartridge detachably attached to the frame, the developing cartridge having a housing configured to accommodate therein toner, the computer-readable instructions, when executed by the controller, causing the image-forming device to perform a printing process according to a mode, the computer-readable instructions causing the controller to perform:
a drum replacement necessity determination process to determine, based on life information for the drum cartridge, whether replacement of the drum cartridge is necessary; and
a mode switch process to switch the mode of the printing process between a normal printing mode and an extended printing mode, the normal printing mode allowing the image-forming device to perform the printing process when the replacement of the drum cartridge is determined to be unnecessary in the drum replacement necessity determination process, the extended printing mode allowing the image-forming device to perform the printing process on a condition that the developing cartridge attached to the frame is not replaced with another developing cartridge in a state where the replacement of the drum cartridge is necessary,
wherein the extended printing mode includes a normal extended mode and a limited extended mode, the normal extended mode allowing the image-forming device to perform the printing process with a charge bias same as a charge bias in the normal printing mode and a feeding speed same as a feeding speed in the normal printing mode, the limited extended mode allowing the image-forming device to perform the printing process with a charge bias lower than a charge bias in the normal printing mode and a feeding speed slower than a feeding speed in the normal printing mode.