1. There are sticky substances on the drum core, such as grease, etc.
Solution: wipe the drum core with a clean soft cloth.
2. The powder is not filled well
Solution: Fill the powder carefully, don't add too much at one time.
3. Toner quality is not good
Solution: select good quality toner.
4. There is a problem with the waste powder scraper (such as scratches, aging, etc.)
Solution: Replace the corresponding accessories.
5. There is a problem with the powder warehouse scraper
Solution: Replace the corresponding accessories.
6, the drum core is bruised
Solution: Replace the corresponding accessories.