There is a halogen lamp in the upper fuser roller, which is heated to melt the toner on the paper, and the lower fuser roller presses the toner to embed the toner into the paper to fix the toner to form images and texts that are not easy to erase.

The upper fuser roller manufacturer tells you that the thermistor is divided into a positive temperature coefficient thermistor, and one is a negative temperature coefficient thermistor. What is a positive temperature coefficient thermistor? The upper fuser roller manufacturer tells you that a positive temperature coefficient thermistor is when the temperature rises, the resistance of the thermistor increases, and the higher the temperature, the greater the resistance, so it is called positive temperature coefficient heat. Sensitive resistor. The negative temperature coefficient thermistor, on the contrary, as the temperature increases, the resistance value of the thermistor becomes smaller, and the higher the temperature, the smaller the resistance value is, so it is called a negative temperature coefficient thermistor. Negative temperature coefficient thermistor corresponds to a resistance value for each temperature in the working temperature range, so we know this relationship, and we can know the temperature by measuring the resistance value of the thermal resistance. Copiers almost use negative temperature coefficient thermistors, we The characteristics of the thermistor are used to detect the temperature of the heat roller, and then the temperature of the heat roller is judged according to the resistance of the thermistor. The thermistor is used to build a bridge or voltage divider circuit to convert the resistance into a corresponding voltage.
The function of constant temperature resistance, in layman's terms, is the temperature control switch to control the fixing temperature. The manufacturer of the Upper fuser roller tells you that when there is a problem with the circuit or other unexpected reasons, the temperature is out of control (the temperature keeps heating), then the temperature of the hot roller will be straight. The rise causes serious damage to the fixing and the machine, and then the thermostat switch comes into play.