remawordasked Oct 22, 2008 at 1:27pm
HP Color LaserJet 2840
HP 2840 Red Dots on pages
I was having blank right hand side printing problems on pages. Re-aligning the (R)cartridge drum carousel gear fixed the problem. That was alot of work, but printing returned to normal. I then refilled the magenta toner cartridge and and while all toner cartriges were out of the carousel I basically blew out all the extra toner that drops down into the machine under the carousel. I reinstalled all cartridges and every thing works fine again but now I have what looks like small red uneven blotches down the center and left side of the page. it looks like they were caused by some liquid spray getting on some rollers making a defect while printing. (I did'nt use any liquid in the maintenance) but I cant figure out if its on the toner cartridge roller, the drum (just replaced) or the dust laser mirror? I previously had a problem with vertical yellow line on printing replacing the yellow cartridge fixed that. Can anyone help. This hp 2840 has like demonic problems I agree with some that it is a printer from hell. Its one of many one after another problems I have encountered since buying it. I noticed a girl posted a similar problem but did not give printer specs so no help received.(someone even referred her to a psycic. Ho!) This is an HP 2840 color Laserjet. (these dots are pretty regular in repetition).I also looked at the roller on the magenta cartridge and couldn't see any obvious defects. please reciprocate...
Measure between the defects and match it to one of the items below.
That should be where your problem is. They also need to line up with each other, if they are offset to the right or left it is not the same defect.
Pre-ICL roller 22.1 mm (.87 inches)
Developer sleeve 33.9 mm (1.33 inches)
ICL roller and Charge roller ICL Roller 37.9 mm (1.49 inches)
charge roller 38.1 mm (1.50 inches)
RS roller 41.9 mm (1.65 inches)
T1 transfer 44.3 mm (1.74 inches)
T2 transfer 56.9 mm (2.24 inches)
Pressure roller 66.6 mm (2.62 inches)
Fuser film 75.6 mm (2.98 inches)
Transfer belt drive roller 89.0 mm (3.50 inches)
Transfer belt tension roller 90.0 mm (3.54 inches)
Cartridge drum 148.3 mm (5.84 inches)
I'm going to bet its the cartridge then, did you empty out the waste toner?
If it was something on one of the rollers it would be on the defect list above. That leaves cartridge putting out toner randomly, or there is something that you are missing when your putting the printer or cartridge back together.
HP Color LaserJet 2840