Re: Mita DC-1860 horizontal streaks after new drum
You say 'horizontal", but I imagine your paper is actually travelling 'laterally' or or sideways through the machine right? That means that the lines are actually running vertically based on the paper direction.
Is that 2" wide line visible on your drum? Drum cleaning blade has likely failed....it should ALWAYS be replaced with a new drum.
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Not really it is best to get an engineer certified on the model of the copier you have to look at it a good engineer will no pretty much when thew see the type of screws and your streaking issue were they come from i would guess either the fuser area or drum area again this is a guess in the dark
The black lines you have sound like a bad drum cleaning blade. If you want to take out the drum unit, first you have to remove the two black screws that hold the process unit in. You can find these inside the front door of machine, you will see a metal plate that is attached to the toner hopper, the black screws are in the upper left & the upper right of that plate. You can then slide out the process unit, it should stop about half way out. Lift up on the orange handle and slide it the rest of the way out. If you have to clean the drum use a soft dry cloth first, pull the drum shaft out and the drum will lift out, if the lines do not go away you can use alcohol & then wipe off as much residew as possiable. If the black lines return after reasembly you have a bad cleaning blade. Hope this helps, Let me know if you need more help.
Streaks at 2.82 inch intervals: Horizontal marks at this interval are the result of a mark on the
fusing roller of the printer. In some cases, these marks can be cleared
up by running a cleaning page through the unit. Laser Printer Cleaning
sheets can be purchased at your local printer/office supply store. If
the marks persist, this can indicate a more serious problem with the
fusing roller that would require service attention.
Streaks at 3.74 inch intervals: Horizontal marks at this interval are the result of a mark on the image
drum of the printer. There is no way to repair a damaged photosensitive
image drum, so in the case that it is scratched or otherwise damaged,
the entire CRU (toner/drum cartridge) would require replacement to
clear up these marks.