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例一、记录笔单偏一边,不受基线调节电位器控制。检查与修理:将“增益”电位器1W04旋钮关至“0”位,记录笔仍偏一边。移位不动,检查±12伏供电正常;检查“基线调节”电位器1W01中心头对地电压为零伏,正常;进—步检查源跟随器1BG01各级电压亦正常,。以上检查说明,前级心电信号能够送至记录驱动放大部分的运算放大器1101的输入端,故障被压缩到运算放大器5G23B 的工作状态是否正常了。当短路5G23B 的输入端(2、3两脚),其输出端(6脚对地)不是0伏而是12伏,调节1W01,此数值不
Example 1, record the side of one side of the pen, not controlled by the baseline adjustment potentiometer. Inspection and repair: the “gain” potentiometer 1W04 knob to “0” position, the pen is still one side. Shift ± 12V power supply is normal; check the “baseline adjustment” potentiometer 1W01 center to ground voltage is zero volts, normal; further step-by-step check source follower 1BG01 voltage levels are normal. The above examination shows that the pre-stage ECG signal can be sent to the input terminal of the operational amplifier 1101 of the amplifying section of the recording drive, and the fault is compressed to whether the operational state of the operational amplifier 5G23B is normal or not. When the short circuit 5G23B input (2,3 feet), the output (6 feet to ground) is not 0 volts but 12 volts, adjust 1W01, this value is not