kaprockiasked Oct 11, 2017 at 3:46pm
Printed text is light in a vertical band about 3" wide from near top to bottom
The printed text has a light vertical band about 3" wide from the top to the bottom of the page. The following is a full printed in all black. This light band is also evident when normal black text is printed and it comes out very light in this banded area. I have replaced the cartridge with a new one with the same results. This band does not have a hard edge on either side. The toner doesn't seem to rub off. It's not as evident from the picture but even the black on the right side of the page does show those very small horizontal raster-type lines but to much lesser degree. I have not done any cleaning on the inside because I didn't know where to begin. I was wondering if this related to the fuser and if replacing that is a good place to begin.
The following is the left side of the page.
The following is the right side of the page.
No way is it fuser related. Could be dirty mirror in laser assembly or dirty transfer roller. Try wiping transfer roller with dry paper towel. Do not touch with your fingers. Transfer roller sits directly below cartridge. If that does not work, you will have to open the laser unit and clean the mirrors with a dry cotton swab.
[SOLVED] Thank you very much for your advice. You were right on the nose. The problem was a dirty laser mirror. I first cleaned the transfer roller and even though it was dirty it didn't fix the printing problem. Next I looked for the laser assembly to see how to get access to it. It didn't look easy but then figured out that the laser exits via a slot which is just forward from the toner cartridge. Without really knowing what I was doing I took Q-tips and cleaned whatever was behind that slot. It looked like some kind of film but not being able to see it except with a small mirror I couldn't really tell. After a few swipes I saw that the Q-tips were coming out dirty so I kept up. After a few trials and checks the light band was actually going away on the printed paper. I kept at it for 15 minutes and got the light vertical band almost gone. With a printed page of text it looks perfect. For a little history of this printer, it was in a house that caught house fire about 7 years ago so this printer was sitting in heavy smoke for a couple days. I did my best to clean it up but that smoke pretty much embeds right into the plastic that is exposed. After initial cleaning the printer was printing fairly well and scanned very well. I did have to replace the ADF because paper wasn't going through it at all. The top paper tray on the ADF was actually partially melted and deformed due to the heat from the fire. I was surprised the printer worked at all and except for the light band which is now fixed it's back to being a great printer. Thank you for steering me in the right direction. This is a great web site which I've used in years past.
This is the printed page before cleaning.
This is the printed page after cleaning.
This pic shows the overall problem from smoke damage.
Full open case.