| 摘要 |
PURPOSE:To identify the factor of a defective processing circuit and to quickly check and repair the circuit by detecting the type of the defect through a diagnostic control circuit to send the detected type to the processing circuit and then turning on and off the light emitting display based on the defect type through the processing circuit. CONSTITUTION:The processing circuits 11-1n are connected to a diagnostic control circuit 2 via a control bus 3 and provided with a function processing part 15, an information transmission/reception part 12, a defect type identification part 13, and a light emitting display part 14. Meanwhile the circuit 2 is provided with a diagnostic information generating part 21, an information transmission/reception part 22, a defect diagnosing part 23, a defect contents memory 24, and a defect type informing part 25. Then the circuit 2 sends the type of the defect contents to the defective one of circuits 11-1n, and the defective processing circuit identifies received type and sets a light emitting means 14 at a prescribed light emitting state. Thus a maintenance engineer can confirm the occurrence of a defect and the contents of the defect through the light emitting display and can facilitate the check and the repair of the defective circuit. |
