1. Since the specific structure of each toner cartridge is different, you can study it according to the actual situation when replacing it, remember the steps and the location of the accessories, and make sure it can be removed and installed.

2. The added toner should be the toner of the same model of laser machine, otherwise it will shorten the use time of the toner cartridge and pollute the machine.

3. Wear a mask and put newspaper on it when replacing, because the toner contains toxic substances.

4. After disassembling the toner cartridge, replace the necessary accessories. For example, if the base powder is heavy and black vertical stripes appear, the surface of the toner cartridge is covered with toner, you need to replace the scraper, and regular black spots appear on the printed manuscript, which means that the drum core itself is damaged or seriously aged, and the drum core needs to be replaced.