1. After removing the photosensitive drum, do the necessary cleaning. The new photosensitive drum should be directly installed in the cartridge seat after opening, and installed in the machine as soon as possible. Never expose the photosensitive drum to direct sunlight, and never let its surface touch hard objects.
2. Do not touch the surface of the photosensitive drum with your hands or unclean objects. When there is dust attached, you can only brush it gently with a soft brush, and do not use any detergent to scrub it. If necessary, you can use toner to clean it.
3. For the photosensitive drum and toner that are integrated mechanisms, they must be replaced as a set at the same time. Shake the toner before loading.

4. When replacing, the toner that falls inside and outside the printer can be sucked out with a vacuum cleaner and scrubbed with anhydrous alcohol.
5. The replacement work should be carried out in a darker studio. In addition, it should be noted that the photosensitive drum is valid for two and a half years when it is not removed, and the validity period after unsealing is 6 months. The validity period is printed on the drum box, and it must be used within the validity period.