**传真机的工作原理及常见故障解决** 一、传真机的工作原理 传真机是一种通过电子通信方式将文件或图像从一台设备传输到另一台设备的设备。其工作原理主要涉及扫描、调制、传输和解调四个步骤。 1. 扫描：传真机通过内部的扫描装置将原始文件转化为电子信号。这个过程类似于复印机中的扫描，但它是双向的，即可以将文件从发送方传输到接收方。 2. 调制：扫描后的电子信号通过调制器进行调制，将其转换为能够在电话线上传输的信号。这个过程称为信号的调制。 3. 传输：经过调制的信号通过公共电话网络或专用线路传输到接收方的传真机。

4. 解调：接收方的传真机接收到信号后，通过解调器将传输的信号还原成原始的图像或文件。

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二、常见故障及解决 1. 无法发送或接收传真：这可能是由于电话线路问题、传真机未正确连接或电源问题导致的。解决方法包括检查电话线路、确保设备正确连接以及检查电源供应。 2. 发送的传真质量差：这可能是由于扫描装置的问题或传输过程中的干扰导致的。解决方法包括清洁扫描装置、调整传输设置或更换更稳定的传输线路。 3. 无法正确识别纸张大小或类型：这可能是由于传感器的故障或设置错误导致的。解决方法是检查和调整传感器的设置，并确保使用的纸张符合传真机的要求。 4. 传真机发出异常噪音：这可能是由于设备内部的部件损坏或需要清洁。解决方法是联系专业人员进行维修或清洁。 三、英文翻译

The Working Principle and Common Fault Solutions of Fax Machine

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The fax machine is a device that can transmit documents or images from one device to another through electronic communication. Its working principle mainly involves four steps: scanning, modulation, transmission, and demodulation. 1. Scanning: The original document is converted into electronic signals by the internal scanning device of the fax machine. This process is similar to the scanning in a copier, but it is two-way, which means it can transmit documents from the sender to the receiver. 2. Modulation: The scanned electronic signals are modulated by a modulator and converted into signals that can be transmitted over the telephone line. This process is called signal modulation. 3. Transmission: The modulated signals are transmitted to the receiving fax machine through the public telephone network or dedicated line. 4. Demodulation: After receiving the signal, the receiving fax machine restores the original image or document by a demodulator. Common Faults and Solutions: 1. Unable to send or receive faxes: This may be caused by telephone line problems, incorrect connection of the fax machine, or power supply issues. Solutions include checking the telephone line, ensuring proper equipment connection, and checking the power supply. 2. Poor quality of transmitted faxes: This may be caused by problems with the scanning device or interference during transmission. Solutions include cleaning the scanning device, adjusting transmission settings, or using a more stable transmission line. 3. Unable to correctly identify paper size or type: This may be caused by a faulty sensor or incorrect settings. The solution is to check and adjust the sensor settings and ensure that the paper used meets the requirements of the fax machine. 4. Abnormal noise from the fax machine: This may be caused by damaged internal components or the need for cleaning. The solution is to contact a professional for repair or cleaning.