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My 1720dn had a paper jam due to low number of sheets. Now it has a crease down the center of each page printed and extremely low printed area (no doubt due to cease)????
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A crease is usually caused by two issues. 1 ) paper is hitting something on the way to the fuser causing a skew. This type of problem would be repeatable every page as well as causing the image to be off centre. The 2) reason is the more likely cause. A bearing on the lower (pressure roller) is beginning to seize. Causing paper not to feed straight through the fuser. This cause a wrinkle from from to back on the sheet of paper. This wrinkle although repeatable generally the wrinkle position up or down on the sheet. This gives the impression of something that is getting in the way of the sheet. If you can change your lower pressure bearings you should be ok again.
The fuser is shot....this is the unit that uses heat and pressure to fuse the toner to the page. It is primarily when the pressure roller wears that you get crinkling and bad fusing, but I'm sure the upper sleeve has seen better days as well. These days it is (sadly) cheaper to replace this printer with a new little HP -only around $100 or so.
There sounds like there is somthing in the path of the printhead. Using a flash light, remove back cover of machine and look for a small piece of paper,etc. Be careful not to jam anything in to th machine. It may take running a thick piece of paper through manually with your hands to remove the object.
There are rubber rollers that grab the paper to pull it through typically these get slick over time and will cause the printer to grab an extra sheet of paper. How I usually fix this problem is to check and see if the rollers are slick if so then I take an Emory board to them to rough them up just a little bit. I have also in the past used clear finger nail polish on the roller and that has helped. I would apply a bit of the clear polish to the roller, if it did not work then I would take the Emory board to it.
. Switch off the
printer and disconnect the power supply. Allow any residual charge
inside the all-in-one printer to dissipate before putting your hands or
any metal tools inside the chassis.
2. Pin down the exact
location of the jam. The 3 hot spots for a jam are before a sheet
completely leaves the paper tray, anywhere between the feed tray and
print carriage or between the print carriage and output tray.
3. Take off the front
paper tray if the sheet jammed while still in the front area of the
printer. If here, you should be able to see most of the paper.
4. Pull the sheet with
both hands and steady pressure. Do not tug as you might rip the paper,
leaving a piece deeper inside the machine.
5. Open the back panel to reach paper jammed between the feed-tray area and print carriage. Carefully remove the jammed paper.
6. Use the carriage
access door to get at a jam further inside the printer. You may need to
remove the print carriage to get to the jam.
7. Replace all parts and
return any access panels to their closed and locked positions. Plug
your printer back in and flip the power switch.
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