Thanks for the response. You're description of the problem was spot on. The tray drops slightly, and then the jammed message appears. I tried your suggested fix, unscrewing the top tray and unplugging the connector but to no avail. I may be on the wrong connector though. There was only one attached to the paper tray as I removed it so that's the one I unplugged. Any other ideas?
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Re: NP6050 false paper jam
Can you see the paper pick-up rollers try to move and pick-up the paper? Or can you hear it make noise? Also, is the problem in paper tray 1? You may have to adjust or reform a inter lock arm on the right side door. If you push the back part of the right top door closer, will it feed the paper? If so there is adjustments for the door and look for a bent Tab on the hing part of the top door about half way up. Just a note have the paper pick-up & paper feed and paper sep rollers been replaced?
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I understand that you're receiving what you believe to be a 'false' paper jam on your HP Photosmart C6280 All-in-One Printer. I would like to work with you today with resolving this issue. Paper jams can be real or false. The product might report a paper jam even when there is no jammed paper. A false paper jam may also be the result of having a bad paper jam at a point in time and that bad jam causing a hardware issue to the paper sensor or rollers. I am going to provide you with some additional troubleshooting steps that apply to both real and false paper jams. You did state that you already checked the paper pathway inside the printer and failed to find any evidence of paper being stuck, but please run the step-by-step troubleshooting below, even if you have already run some of the steps.
Well I fixed it!!! Here's what I did. You see this picture of the cover opened? Where the arrow's pointing is the home position of the printer head. Under there I found a scrap piece of paper! Here's exactly what I did. When I got home I decided to plug it in to see if it would work, but it made the same noise and showed the same error message as before. I opened the cover as shown above. This resets it, and it says "close cover". I closed it, and AS it started to go through its routine I OPENED IT again, and I could see the printer head moving back and forth. At this point I used a flashlight to see where the home position of the Head was, and that's where I found the scrap of paper! I unplugged it for safety and was able to remove the scrap with my fingers. By your descriptions, referring to the other users, you just might have the same problem.
It appear from here that the exit sensor may be dirty and you can use canned air and blow it out.
You may also be missing the paper out sensor that is located at the bottom of the printer oposite of the paper tray when you pull it out. When the flag arm has fallin out, it will give a false paper jam error when the last sheet has printed from the tray, not knowing or detecting that the tray is now empty.
Well I would take a can of air and blow off the sensors, especially where you began to have problems. The sensors (over time) become coated with paper dust and now reflect back on themselves thinking there is paper there all them time. From your description of the problem, it seems like the issue-intermitten jams/intermitten false jams, until a total false jam.
When you put documents in the feeder and you push start do you see 2 black arms swing out to count the number of orignals? If yes, dose the doc tray begin to go down and then jams? If yes, you can try something.... OK, turn the copier off and move the 2 paper guides of the doc tray toward the middle. You need a #2 philip's head screw driver. Remove the 2 silver screws that will be sunk in a bit on the top of the doc tray. Once you remove the screws, remove the top part of the doc tray and you will have one connector toward the front. Unplug it and replug it back in and see if that works, if so return the 2 screws and you should be OK.
Does it jam at the paper guides before the reg. rollers? Did you replace the reg. clutch? Also, dose it happen only with the LTR size only? Due the bottom 2 trays work & the by-pass? Also, have you made sure the OPC screw is tight? I think that it may be that your paper guides may be bent in-ward, by accident when unit one was removed.... I've done it a few times. Also, did you have the same problem before? Did you test the sensor and flag? It could also be a sepperation problem. You never said where it is stopping, at what exact spot is it stopping at?? Gave you a few ideas.... Get back to us with more info.
PRINTER TRY TO PICKUP THE PAPER,BUT PRINTER CAN'T.THE CAUSE OF THIS ERROOR IS FAULTY PICKUP ROLLER & SEPRETION PAD.SOME TIMES PAPER TRAY CAN NOT BE OPEN WHEN WE PUSH IN,IN THIS CASE PRINTER SHOWS PAPER JAM