Abstract: Through a combination of a hybrid diagnostic scheme based on qualitative and quantitative technologies, at least component level status information can be obtained about a machine, such as an electronic device. In particular, qualitative model based diagnostic technologies is used in conjunction with quantitative analysis techniques and signature analysis to achieve accurate and reliable diagnosis of components and systems down to the individual component level, for example, down to the consumer replaceable unit level. Thus, the hybrid diagnostic methodology exploits the diagnostic information content in already available system signals via intelligent processing and allows for diagnosis with minimal sensor requirements. Furthermore, the diagnostic methodology allows for a self-diagnosing machine having diagnostic intelligence which in turn can reduce service time, service costs, increased machine up time and improve customer satisfaction.

Abstract: A method of ejecting copy sheets from the compiler in a printing apparatus that includes a processing section for transferring a developed image onto a copy sheet and a finishing section with a compiler and a stapler for receiving plural copy sheets to generate a print set. In particular, the level of copy sheets in a compiler tray is sensed, a tag in non-volatile memory indicating a number of allowable extra copy sheets in the compiler is monitored, and a capacity count for sheets to be stapled is referenced. In response, a set of copy sheets may be ejected from the compiler in an unscheduled manner as a function of the level of copy sheets in the compiler tray, the tag in non-volatile memory, and the capacity count for sheets to be stapled. This enables the finisher to complete a set that might have been prematurely ejected or enables the finisher to eject a set before reaching a jam condition.