Browse Prior Art Database

Self Analysis of Copier Electronics

IP.com Disclosure Number: IPCOM000048112D
Original Publication Date: 1981-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Dodge, JH: AUTHOR [+3]

Abstract

A microcomputer analyzes the entire electronics of a copier and indicates corrective action, as appropriate, to the operator.

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Self Analysis of Copier Electronics

A microcomputer analyzes the entire electronics of a copier and indicates corrective action, as appropriate, to the operator.

Fig. 1 is a block diagram of the copier system electronics, Microcomputer (MC) 10 includes appropriate programs for control of various copier functions through output connections, such as to operate various power supply circuits 12, analog circuits 14 through digital to analog (D/A) converter 15, and the like. MC 10 also contains programs of complete diagnostics to self analyze individual circuits and to indicate through display 18 the corrective action needed by the operator. MC 10 produces command signals on output 19 to enable D/A converter 15 and place a reference analog signal on line 20 which is fed to comparators 21 for comparison against feedback lines 17. Input lines 22 are monitored for appropriate responses. This combination of circuitry and software allows the copier to analyze its entire operation, eliminating the need for test points, special measuring tools and techniques, and/or special machine operating instructions.

Fig. 2 shows an example of power supply checking. MC 10 outputs a command 30 to power supply 32 for a given operating point. Concurrently, appropriate ones of the lines into analog ladder 34 are enabled by MC 10 to drive one input to operational amplifier 35, the other input 36 being a reference voltage. The power supply 32 output through divider network 38 is then compared...