Thank you all for your answers! Especially femaster for the very detailed one.
After reading your answers I'm aware of a few things I did wrong now:
- I didn't know that I had to "lube" the cleaning blade with toner powder and thus it probably didn't clean the drum properly. After putting toner powder both on the blade and on the drum the print changed quite a bit (see picture below).
- I probably exposed the drum way too long to light, can't exactly tell how long, but it was definitely way more than 1-2 minutes (only light from a fluorescent tube, no sunlight, but I guess that doesn't change a lot), rather something like 20 minutes. I knew it was sensitive to light, but I didn't know that it's that sensitive. And the drum also is quite old (same as the copier itself).
- I used a wrong substance for cleaning, it wasn't 99.9% isopropyl alcohol, but some less "pure" one.
- I already noted the grounding tab when putting it together the first time, but couldn't remember how it was positioned initially, thus I tried both above and below the cleaning blade, but it didn't really make a difference.
- (+ possibly some more I'm not aware about yet?)
This is how the prints look now (white page for reference):
example-prints2-small.jpg
(yes, this is from the same device!)
Still very bad, but the pattern changed quite a bit. One can clearly see a pattern repeating with each turn of the drum. The black parts now are only located at certain parts of the page, seems the cleaning blade is doing it's job properly now and the "lubing" was indeed very important.
Can the remaining issues be explained by a bad drum? Or must there be some other issue? (additionally?)
You mentioned that even the 99.9% alcohol already does change the surface a bit, so I guess there is some better way of cleaning? (compared to what you wrote, not what I did
).
Regarding the grounding tab I wasn't sure how it's supposed to be located, is this correct:
cleaning-blade.jpg
?
In hindsight I shouldn't have done that cleaning attempt, as I surely did more harm than good.
Thanks again for your answers, I already learned quite a lot and looking forward to learn even more from your future answers!
Bookmarks