The line is thinner, almost like a pencil.
I looked at the cartridges and pulled back the plastic cover, saw a plastic strip (the wiper blade???), but didn't see any obvious issues. After reinstalling the old cartridges, I began getting lots of colors in vertical wide lines.
I did, however, notice the black role (looks like camera film) had the same line on it, and then the same (new) wide lines. Can this be cleaned without damaging it?
Although I've read on how laser printers work, I'm not getting the overall picture. Each cartridge is filled with powered toner, and, when I attempt to close the door, the flaps open to expose the roller. I assume the black "film" rubs against the cartridge rollers and each roller spins as needed for color.
In previous posts (or online articles), it stated to grease the blade. if I put grease on the blade, will that get onto the roller, and the black film, along with other areas?