The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 1994
Filed:
Aug. 24, 1993
Takashi Hoshi, Kanagawa, JP;
Toshiyuki Koshiji, Kanagawa, JP;
Yukie Iseki, Kanagawa, JP;
Yoshiaki Sato, Kanagawa, JP;
Kiichiro Ohgo, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An image recording apparatus consists of a control system including a CPU, an image input terminal, an image processing system, an image output terminal, and a user interface. An I/O controller is provided in each of the above units. During the power-on sequence of the apparatus, the CPU executes an interrupt test for checking whether interrupt processes of the CPU with respect to sync signals are performed correctly, and an I/O port operation test for confirming that an I/O port of each I/O controller functions correctly. When a prescribed button is pressed at the user interface, the CPU enters a diagnostic copy job mode, in which copies are actually produced in the same manner as in a normal copy mode to identify a unit in trouble.