I recall once at a school workroom, one of the big Toshiba's kept on jamming, did all the usual stuff, clean rollers, sensors, checked sensors, now funny thing, the Sharp AR 620 that they had for less then 6 months was also jamming, now I am like WTF.
The school custodian solved it for me, told me they had run out of letter size, and was cutting down legal size to letter, I pulled paper from the large trays and took a good look at it, and yepp... had been cut down, and not very well, they used the paper cutter, the old fashioned had type, end of school year budget runs tight, so they make do with what they have.
Actually that was easier than you might think, we do commercial printing for the local shops. We would set it to do a 500 page job and it would ask for paper at 498 every time. Check the stack for double feeds and it would never be the case, always 2 pages short in every ream of every box.
Cthulhu for president! Why settle for the lesser evil?
Being near the ocean we get a lot of damp paper calls. Machines though are much more forgiving these days than they were in the past. I think back to the old Mita 1205 and others which would make blank copies if the moisture content in the paper was too high......you'd change the paper and it would make perfect copies again. I used to carry my own paper in my car just for testing because often the customer's entire paper supply would be damp.
I've also seen where the glue from the wrapper would get on the edges gluing sections of the ream together.
Now that I think about it...
I had an HP 4500 in my basement that someone had given to me. It sat there for over a year before I one day decided I needed some color prints. It was giving my practically blank prints, and I was thinking I needed a new drum or transfer unit at first. I ran out of paper that I was testing it with, and so I turned the paper over to reuse it. Then I started getting good config sheets. I realized then that I had a paper problem... and felt pretty stupid about the whole thing.
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