1. Do not touch the surface of the OPC drum with your hands.
2. It is strictly forbidden to use chemical reagents (such as alcohol) to wipe the surface of the OPC drum.
3. Do not hit the surface of the OPC drum with hard objects.
4. Be careful not to bring office supplies such as staples into the printer.
5. After removing the toner cartridge or the OPC drum from the machine, it should be placed away from light, preferably covered with newspaper or other things.