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故障现象：开机后机器发出电源电极的叫声，电源送不到整机电路，机器不工作。分析检修：ＨＤ—ｓｅｃｕａｒ型血透机采用开关式电源，当打开电源开关有Ｅｎｄｓｔａｇｅｍｏｄｕｌｅ板上的两块串联的３．６Ｖ电池供给主电源板（ＢａｓｅｍｏｄｕｌｅＣｉｒＣｕｉｔｂｏａｒｄ
Symptom: After the machine is turned on, the machine will give out a call from the power electrode. The power supply will not reach the whole circuit and the machine will not work. Analysis and maintenance: HD-secuar type hemodialysis machine adopts switch-mode power supply. When the power switch is turned on, there are two series-connected 3.6V batteries on the Endstage module board to supply the main power board (BasemoduleCirCuitboard