Electrophotography – Diagnostics – Image forming component
Patent
1997-04-29
2000-02-08
Beatty, Robert
Electrophotography
Diagnostics
Image forming component
324511, 324528, 340653, 358406, 399 32, G03G 1502
Patent
active
060235950
ABSTRACT:
It is an object to identify a failed portion in a circuit for image processing and notify a service center of the failed portion, thereby enabling the failed circuit to be promptly replaced. Circuit portions of image processing units are constructed on separate substrates. As processing routes of an image signal which is inputted from an A/D converting unit, a route in which the image signal passes through a given circuit portion and a route in which the image signal doesn't pass therethrough are set. Data of a predetermined pattern is processed by those processing routes. The presence or absence of a failure of each circuit portion is discriminated from the processing results. The discrimination result is transmitted to an external apparatus installed in a service center.
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Arimoto Shinobu
Honbo Tsunao
Kanno Akiko
Kitamura Shingo
Nakamura Tetsuya
Beatty Robert
Canon Kabushiki Kaisha
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