| 摘要 |
PROBLEM TO BE SOLVED: To provide a fault diagnostic device that detects a fault of an input signal or a fault of a device and informs a maintenance company about the fault to troubleshoot the fault. SOLUTION: This fault diagnostic device detects a voltage of an input signal and of a control signal of each circuit of a display means 1 and an input power supply and a control means 2 that applies quality discrimination to the detected control signal and stores a history storing past fault contents is connected to a maintenance center 3 via a network when the display means is failed to receive immediate contact from the center 3 about a disposition method of a defective component, a data and time and a cost or the like.
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