This drum then rolls the toner onto the paper as it passes. The laser printer works by a laser beam ‘sketching’ the image of what you are printing onto a green metal cylinder called a drum or photoconductor unit. There are a few possible causes of this so you may need to check each in a process of elimination to figure out what’s happening but in most cases, the problem is caused by the drum. Missing areas of print (either always in the same place or not) Remember to be careful and if you are at all unsure, find a printer technician who is experienced in cleaning the printer. Warning: make sure you wear gloves and don’t touch the transfer belt film with your fingers or the hoover, you could leave a mark that will cause additional print problems. If all else fails, you may need to replace the transfer rollers / transfer belt. #CANON MP470 PRINTER TROUBLESHOOTING FREE#
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