My Laser jet CM1312nfi keeps printing pages with a lot of black lines on the paper. At first the black horizontal lines were about every 2 inches or so, now they cover the whole page, where the page looks black. What would the solution be?
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Couple possibilities:
Fuser hot belt has wear lines transfering to the page
Black pcu needs to be replaced
Transfer unit is not being cleaned properly and needs to be replaced.
Remove each of these assy and inspect them for wear or lines that corespond to the lines on your prints.
on the drum unit that you put your toner inn, There is a blue or green slide lever move the slide back and fourth 10-15 times. If you have some van air blow that area out ( F.Y.I. if you do this some toner will fly out ) if this does not take care of it the drum unit my be bad,
do a 1/2 print test. copiersomething with a lot of print. open front cover when the paper is 1/2 way through the machine remove drum. Look art the paper and the green drum if the marks are on the paper & drum then the drum is bad. If not the fuser asm is bad, the part that gits hot when melting the toner on the paper,
If they are the same distance apart every time then suspect the problem to be caused by the components in this order First the drum that is in the print or xerographic module, the charge and cleaning roller are located in that module also. So I suspect that first.its .Located above and to the right of the toner cartridge. Secondly it could be the roller on the toner cartridge, that would occur probably every 1 1/2 to 2 inches apart, the drum would cause the defect about every 3 inches. It less likely could be coming from the fuser, and if the fuser was causing that you should also have a lot of jams. There is also a transfer roller on the right hand door that could be causing it, but that would be exceptionally rare. If the lines are random and have no consistant spacing, I would suspect the power supply then the laser.
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