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故障现象 :按“ＳＴＡＲＴ”键 ,走纸时走时停 ,时快时慢现象 ,打出的心电波形失去了诊断意义。故障分析与检修 :该仪器的走纸速度控制是应用了锁相技术 ,它是由晶体震动器Ｘ2 10产生的 -32 76 81ｋＨｚ信号经 14位二进制串行分频器ＩＣ2 0 9作 12 8或 6 4分频后得到频率为 2
Symptoms: Press the “START” key to stop when the paper is fed. When the time is fast or slow, the ECG waveform lost will have no diagnostic significance. Failure analysis and maintenance: The instrument’s paper-feed speed control is the application of phase-locked technology, which is generated by the crystal vibrator X2 10 -32 76 81kHz signal via 14-bit binary serial divider IC2 09 for 12 8 or The frequency is 2 after the frequency is divided by 6 4