Causes of problems with the drum unit
Normal wear and tear. Change the drum unit every few times, after the appearance of longitudinal stripes or repeating black spots on the sheet.
Paper quality and conditions. First of all, on the type of paper used for printing, as well as the type of toner, print mode, direct sunlight, room temperature and humidity.
Dropping debris into the printer. In particular, users themselves contribute to the reduction of drum life due to small parts falling into the printer due to their own inattention.. Therefore, before starting to print, you must observe, so that various buttons do not fall into the copier along with the paper, paper clips, wool and others.
Printing one page at a time leads to a halving of the service life. The actual number of pages printed with a single drum unit varies depending on the conditions of use.. Under standard printing conditions (by 3 pages), the service life of the A4 paper drum is about 30 thous. pages.
Evidence that, that the fotoval has become unusable, damage to the upper glossy photoconductive layer, which leads to a faint and dull print, the appearance of black longitudinal stripes or spots or the appearance of other defects. As wear progresses, more and more black bars will appear, they will become solid and more pronounced, predominantly along the side edges of the paper.