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在日常对医疗设备的检修工作中,曾发现ECG-6151型心电图机描笔单偏的故障。 一、故障现象 接通电源后描笔向操作人员方向单偏。逆时针调节基线钮,调节到接近极限位置时描笔才能向上移至中心位置,此时才可看到幅度缩小了且反向的毫伏定标信号。 二、分析检修 ECG-6151型心电图机是一种采用单片微机控制技术的心电图机。它的主机由三块电路板组成:浮地前置放大电路板、自动键控电路板和控制与主放大电路板,主机还配有专用的交流供电
In the daily maintenance of medical equipment, ECG-6151 ECG machine has been found stroke single partial failure. First, the failure phenomenon After the power supply pen to the operator direction of one-stroke. Counterclockwise adjustment of the baseline button, adjust the pen close to the limit position can move up to the center position, then you can see reduced amplitude and reverse millivolt calibration signal. Second, analysis and repair ECG-6151-type ECG machine is a single-chip microcomputer control technology ECG machine. Its host consists of three circuit boards: floating preamplifier circuit board, automatic key control circuit board and the main amplifier board, the host is also equipped with a dedicated AC power supply