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CURRENT FEEDBACK FAULT DETECTION FOR PRE-CLEAN DICOROTRONS

IP.com Disclosure Number: IPCOM000025902D
Original Publication Date: 1988-Dec-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

In pre-clean corotrons as found, for example, in the Xerox 1075 or 1090 copiers or the Xerox 5090 duplicator, D.C. current to the shield is monitored, and a fault is declared if the current value falls outside defined limits. This measurement assumes that current supplied by the power supply reflects what is delivered to the photoreceptor and toner. It is possible, however, that some of the supplied current is leaking to ground via an undesired ground path. If the current is leaking to ground, the toner under the pre-clean charging device will not be properly charged, and a cleaning failure will resu 1 t.