DIAGNOSTIC MODE - DISPLAY OF EXPECTED LOGIC LEVEL OF DIGITAL INPUT DEVICE
Original Publication Date: 1990-Apr-30
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
The process of diagnosing component failure within a xerographic system is aided through the use of visual indications of component logic levels within the system. In a system employing a CRT type user interface and diagnostic software, it is possible to utilize the user interface to provide a visual indication of component logic levels. In this system, the diagnostic software is capable of selectively energizing digital output devices (i.e. switches, sensors) and dynamically monitoring the logic level of digital input devices (i.e. switches, sensors). The usefulness of this type of diagnostic system is further enhanced by a visual indication of the expected logic level of the input devices. The expected logic level is defined as the logic state that would, under normal conditions, be displayed with a given set of circumstances. The inputs that deviate from their expected logic levels are displayed with an alternate background color or similar distinguishing feature to allow the service representative to quickly identify a potentially defective input component.