ＥＣＧ—６５１１型心电图机是日本光电公司生产的单导心电图机。该机结构紧凑、键控灵敏自如，无机械转换的动作噪声，尤以较佳的抗干扰能力而被国内广泛应用。但该机在临床应用中多次发生走纸电路的故障，我们维修时在把握好电路工作原理的基础上，采用列表分析较顺利地完成 The ECG-6511 electrocardiograph is a monoconducting electrocardiograph manufactured by Japan Optoelectronics. The machine has compact structure, sensitive keying, and no action noise of mechanical conversion. It is widely used in China because of its better anti-interference ability. However, in the clinical application of this machine, there were many failures in the paper feeding circuit. We maintained the principle of circuit work well and we completed the list analysis more smoothly.