G - Physics – 10 – H
Patent
G - Physics
10
H
84/1.1
G10H 1/00 (2006.01)
Patent
CA 1165600
ABSTRACT OF THE DISCLOSURE An electronic organ having an internal system for fault detection. Information regarding the actuated keys, tab switches, and control switches of the organ is read into a microprocessor which controls tone generators, filters, and the like in response thereto. Upon actuation of a unique set of input switches, the microprocessor branches into a diagnostic routine. In the diag- nostic routine, all of the input and output circuits are sequenti- ally tested so that any faults can be isolated. A lighted display associated with one set of the switches provides visual output as to the progress of the test sequence. In addition, when a fault is detected, this lighted display provides information regarding the location of the fault. Through use of this system, a test of an electronic organ can be performed rapidly, and the test protocol can ensure that no switches or output circuits are accidentially omitted. In addition, because selection among comparable circuits is accomplished internally by the microprocessor, the subject inven- tion permits technician control over aspects of the organ operation which are normally inaccessible to a musician performing on the organ. The diagnostic sequence automatically resets when the organ is turned off so that even if a performer accidentally entered the diagnostic mode, the organ would readily return to normal operation. The test sequence can be caused to proceed on an automatic or a semi-automatic basis at the option of the test technician. -20-
374407
Baldwin Piano And Organ Company
Ridout & Maybee Llp
LandOfFree
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