7700 "Jam At Fuser"

[richdude]

I have a Xerox 7700 that showed a "jam at fuser" error occasionally when there was no jam. It used to do it once every few days. Now it does it routinely and often won't reset. Even after removing the sheets (they aren't jammed) and restarting the machine by turning it off and on, it still says "jam at fuser". Then it will suddenly show "ready" for no apparent reason. I print again, and a few sheets later it does the same thing again. I've replaced the fuser (it says "near fuser life" on an almost new fuser that does not show that warning when installed in another 7700). I think it must have a sensor in the paper path that is sticking or is dirty, but I can't find it.

Can anyone help? Richdude

 

[Michael52x]

Howdy RD, I have been having weird stuff on a few 7700's too, and the fuser issue is odd. Is there paper at the registration ? Or IN the fuser? I replaced an exit assy. to fix that problem, but a new fuser still shows only 50%.
Other consumables can be re-set, but not the fuser!
I will research this as I am a Xerox Authorized Tech on most of their products. I am suspecting corrupt NVRAM, and I dont want to change out an Image Processor board. There might be a fix and will post when I know.

 

[richdude]

Hi, Michael - That fuser percentage is covered in the Xerox Tech support files, I now find. It says that if you put a used fuser in, it either shows it as 50% or 10%, and there is no way to reset it. It even occurs if you take a fuser out, try a different fuser in the printer, then try and put the original fuser back in. It will be recognized as a "used fuser" and set at either 50% or 10%, depending on some mystical quality that isn't defined. The resolution, unfortunately, if you don't want to throw away a fuser with 40% or something left on it, is to keep pulling it out and putting it back in as you run the machine. You put the fuser in, it shows 10%. Run the printer until it gets down to 2%, pull the fuser out with the printer powered up, then reinsert it. It will reset to 10% again. It's silly, but that's what you can do.
On the "jam at fuser" false error, I started cleaning the
whole end of the printer with a toner vacuum, especially the sensors in the paper path, and it eventually quit showing that error. I don't know that dirty sensors were actually the cause, but it hasn't done it since. Anything else you can find out about it, I'd be glad to know. Richdude.