At self-test execution, the processing means determines the fault or faultlessness of all power supply voltages A-D generated in the power source part 26, and executes information for suggesting a fault of the power source part 26 based on the determination result. 該処理手段は、前記セルフテスト実行時に、前記電源部26で作られたすべての電源電圧A〜Dの良否を判定してその判定結果に基づいて前記電源部26の故障を示唆する報知を行う。 - 特許庁