Fuji Xerox Co., Ltd.

Kouji Adachi

Kaoru Yasukawa

Norikazu Yamada

Tetsuichi Satonaga

Eigo Nakagawa

Kouki Uwatoko

Kiyoshi Horie

Nobumasa Furuya

Kazuo Maruyama

Takeshi Sumikawa

Tsuneo Noami

Toshirou Yamamoto

A failure diagnosis method diagnoses a failure occurring in a diagnosis target apparatus including a drive mechanism having a drive member that receives power supply to operate and a power transmission member that transmits drive force of the drive member to another member. The method includes automatically acquiring by a sensor an operation state signal indicating an operation state during the drive mechanism operating for a predetermined period; and analyzing the automatically acquired operation state signal based on a failure probability model, which is obtained by modeling a cause of failure occurring in the diagnosis target apparatus with using probabilities, to execute failure diagnosis with respect to each of constituent members of the drive mechanism.

Failure diagnosis method, failure diagnosis apparatus, conveyance device, image forming apparatus, program, and storage medium

A failure diagnosis method diagnoses failure occurring in an image forming apparatus. The failure causes defect in an image output from the image forming apparatus. The failure diagnosis method includes acquiring operation state signals indicating operation states during the image forming apparatus operating in different operation conditions, respectively; and analyzing the acquired operation state signals based on a failure probability model, which is obtained by modeling a cause of the failure occurring in the image forming apparatus with using probabilities, to execute failure diagnosis with respect to each of constituent members constituting the image forming apparatus.

Failure diagnosis method, failure diagnosis apparatus, image forming apparatus, program, and storage medium

A latent color image developing system for copying a document having a first color images and second color images develops the first color images with a first color developer and the second color images with a second color developer. The second color developer includes a toner and a magnetic carrier having a density of less than 4.0 g/cm.sup.3 and a particle size in the range of 30-50 microns. A developer roll is used having a main developing pole with a flux density of more than 500 gauss in a nip region proximate a photosensitive member having latent electrostatic images to be developed.

Latent image color developing system

Growing community of inventors

Kanagawa, Japan

Kouji Adachi