Xerox Corporation

James J Petery

Michael Nicholas Soures

Ernest L Legg

Anthony M Federico

Robert Steven Pozniakas

David R Kamprath

Stephen P Wilczek

Stephen F Randall

Timothy David Thomas

Nancy R Kelly

Jeffrey Michael Gramowski

Cheryl Koenig

Joanna Brown

Cheng-Ning Jong

Dennis E Miazga

Nitin Shenoy

Bernard N Hakac

Hari K Prasad

Nate Weldon

Kathleen Spencer

Christina DiMarco

A diagnostic system made part of or for use with a document handling device in which a customer is guided toward performance of at least one comparison means in a diagnostic routine analysis. The comparison means is selected from a group comprising (1) a first comparison comparing a fused print media and an unfused print media for presence of a defect, (2) a second comparison comparing an output print media and at least one image on a screen for a type of defect, and (3) a third comparison comparing a low-charged print media and a no-charged print media for qualities of the defect. The customer enters a selection based on results of the first, the second, or the third comparisons. The diagnostic system can identify a part causing a defect in the print media based on results of the comparisons.

Customer part replacement feature utilizing high frequency service interval fault and signature analyses

The present invention is concerned with a method of deselecting the features of a xerographic printing machine to be able to continue operation of the machine even though a fault has been detected. In particular, the control isolates a detected malfunction to a particular input or output, determines that the particular input or output is related to a specific machine feature that has been selected for a particular job requirement, and instructs the operator by message to deselect that particular feature for continued machine operation. In the event that the isolated fault is related to a machine feature that has not been selected for the particular job requirement or that is not in that particular machine configuration, the control ignores the indicated fault for the continued operation of the machine.

Feature deselect control

The present invention includes a plurality of input/output processors communicating with a master processor. Each of the input/output processors has a filtering mechanism to filter the inputs before transmission to the master over the communication channel precluding the necessity of filtering at the master. More importantly, the shared communications system is not loaded down with every change of an input. Because of this feature, only meaningful changes are put on the communication line, thus substantially reducing its load which makes its effective response time stay high. The inputs when received at the master can be immediately handled to improve the central processor response time. Two types of filtering are provided, in particular, transition and debounce filtering to respond to switch and sensor inputs. Also, there is provided a means to programmably select the type of filter and the time period of filtering.

Filtered inputs

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Webster, NY, United States of America

James J Petery