This problem is easy to diagnose. The hard part about this repair is that if the fusing assembly needs to be replaced you have to disassemble a lot of the printer.
I was called out the other day on a M2727 that had a line running down the pages. At first I thought it was just a simple cleaning of the glass strip underneath the ADF unit. However, upon arrival I noticed it was doing it on printed pages also. Whenever troubleshooting lines on pages the first step is to isolate the problem. If your printed page from the computer has a line on it then you know you have a problem with the print engine. If the problem doesn’t happen on printed pages but on copied pages then we know it’s related to the optics in the copy unit portion. In the case of this service call it was the print engine.
The first step when troubleshooting lines on the print engine is to replace the toner cartridge as majority of print quality related issues from the print engine happen with the toner cartridge.
Step number two: if after replacing the toner cartridge your issue isn’t resolved then the fusing assembly is the next logical choice. Turn the machine around. Open the rear access door and using a flash light, check the surface of the fixing film (gray) and the pressure roller (orange). If the gray surface of the roller is discolored or has a line running down about the middle, then film is worn out. If the orange roller has parts missing or has toner build up on the surface, then the roller is worn out.
On this service call, the fusing assembly had a line in the middle of the fixing film. I asked the customer if they fed envelopes through the machine. They answered yes, of course. So I knew the fusing assembly would need to be replaced. When envelopes are feed through printers with fixing films, the edge of the envelopes cause extreme wear on the fixing film and premature failure. When the fixing film wears out in this area it will start leaving smudges and lines as the toner sticks to the film and doesn’t get properly bonded to the paper. Replacement of the fusing assembly will be needed.
I’m not going to provide the instructions for the fusing unit replacement in this article as it is a pretty involved process. If you need replacement instructions for the fusing unit please click on the link at Market Point’s website for the service manual and click on the link below for pricing options for the fusing assembly. Again, this procedure is not the easiest so I would only recommend this job for people who have some experience with printer or copier repair.
RM1-4247 – Fuser Assembly/ Fixing Assembly. This fuser assembly fits the HP P2014, P2015, and M2727mfp
Kevin Gumpp is a certified printer technician and freelance writer for Market Point. If you have a question regarding this topic or have any other printer repair related questions or topics for which you would like more information, please send an email to firstname.lastname@example.org.