04-28-2014 10:18 AM
We have a HP LaserJet Pro 400 M401N that is 27 days out of warranty. Suddenly last week it started this "Jam in cartridge area. Open door and clear jam" error. I have not luck with just clearing the jam. Wondering if anyone knows what I should be looking at inside as far as replacing some of the parts to get this running again?
04-30-2014 12:14 PM
Welcome to the HP Forums!
I am sorry, but to get your issue more exposure I would suggest posting it, in the commercial forums since this is a commercial product. You can do this at HP Enterprise Business Community.
Hope this information helps, and have a great day!
05-06-2014 09:15 AM
Thanks for the help. I did post this on the business forum site.
It was that I needed to replace the "RM1-8806-000CN Registration roller assembly - For use with LaserJet Pro 400 M401 printer series" once I did that all was solved.
01-12-2015 01:54 PM
03-05-2015 03:58 AM
I had this message this morning after only around 900 pages being printed. Out of warranty so done the strip down to check spring, that was ok but there was a build up of tonner just infront of the flag, got that off with tweezers and screwdriver, dont let it foul the printer internals and hey presto message gone. Its fidderly job but not hard at all, only need a phillips screwdriver and tweezers. Google a service manual and that will help you get covers off etc. Done rush and if your getting frustrated just walk away, have a cuppa and come back to it.
04-28-2015 08:20 AM
05-12-2016 12:19 PM
I tried the suggested spring tightening method and it did not resolve the issue I was having with the M401 Constantly jamming. I have to disagree with the statement that it "isn't a problem with the cartridge area." It seems as though the toner cartridge is not moving at all. I have replaced the toner cartridge with a new "remanufactured" cartridge and it still does the same thing. I have also tried to install an OEM toner and that did not resolve the issue either. The machine jams right after registration and right before entering the toner cartridge. I have included images for the spring procedure that did not help. I am still under the impression that this is a problem with the toner cartridge but have been unable to prove it.
05-12-2016 12:30 PM
Remove the two side covers and the back cover. Disconnect all of the wire on the controller board that run through the wire guide. Remove 1 screw and remove the guide. You will see the exit flag. Take a flat tip screwdriver and wrap the spring one turn tighter (over the top). Use a spring hook or a paperclip that is bent at the end and grab the spring from below the holder. Pull it back to it original resting place and bend the tip of the spring a bit so it won't unwrap. Re-assembly the machine in reverse order and then run test prints. This should work for you.
05-12-2016 12:35 PM
Thank you Steelhorse, I appreciate your blind copy and paste of the previous post. If you even bothered to take the time to read my post, you would clearly be able to see that I removed the rear cover and double wound the spring. I also bothered to take photos of the sensor you are suggesting is "wound a little too loosely." It didn't fix a thing. The paper isn't passing through the toner cartridge, period. (At least in my case.) Clearly indicating that this would more that likely be an issue with the cartridge or the cartridge motor/gears. But hey, thanks again for reposting.