Print files and drum core also appear 1 centimeters above the same width of the vertical mafia, the general customer also think is leaking powder: this is the scraper out of the problem, resulting in the stick core powder scraping is not clean.
The print file appears in the vertical thin Mafia: usually scraping plate and scraping plate edge of the small scraping piece sticky dirt or scraps of paper.
Print files in the horizontal underworld: Usually the cartridge inside the magnetic stick powder, along the turn a few laps on it.
If there is a clear bottom ash on the printed file: there is usually a problem with the drum core or toner.
Print file color unevenness, well-known white road: from the outside to see the magnetic stick can also see the toner, if you see some of the magnetic stick on the powder, some places there is no powder, indicating this toner toner to exhaust.
If the printer has a blank sheet of paper: Check the printer first, if there is no problem, it means that the cartridge in the assembly of the problem.