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COMPONENT CONTROL FOR BYTE INPUT

IP.com Disclosure Number: IPCOM000025633D
Original Publication Date: 1986-Dec-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

The purpose of this idea is to provide a Tech Rep with a means for isolating a circuit test failure occurring during self-test of a copying or reproduction machine. The self-test is usually performed by an input monitor circuit located on each machine remote, the circuit consisting of a reed relay under the control software, whose normally closed contacts apply logic ground to the returns of the machine d.c. input devices. In addition, there is usually other test circuitry which is also controlled by software for either pulling all external input signals to ground or forcing all inputs high through pull up resistors.