LaserJet 2100 - multiple pages feed even after roller and separation block replacement

Hello

I have a old and, up to now very reliable LaserJet 2100.

After experiencing a few problems of collection of papers, I replaced the power rollers and separation for the MF tray and the main tray buffers. Each tray pickup seems to work well and always takes a single sheet at a time.

However, what power from the main tray (bottom), often (but), a second sheet will be in the printer to receive AFTER the first leaf has been picked up and transplanted (that is, the end of the page has entered the printer). It's almost as if I print a multi-page job, even if it's a single page (that is, the regular test page). The first page comes out of the printer normally and then the printer stops (paper jam error) with an inch or two of the second sheet comes out of the output slot.

With the covers off the coast, I see that the solenoid is it undertakes to allow the feed roller to bring in the first page, but remains often engaged a bit too long, so a second sheet is picked up * after * the first sheet is completely picked.

The maintenance manual enamels on the use of signals from the sensors in the paper (or for that matter, even where they are), so I'm a bit lost as to how to solve this further.

Any ideas?

It is a problem on older printers. Your question is tray 2 pickup solenoid that controls the movement of the roller from tray 2. It is very difficult to access, and you will need the maintenance manual. What happens when you send a print job the main gear assembly rotates and the solenoid which controls the roll tray 2 active and moves his arms 'L' to release the roller and then turn off the power to the solenoid and the arm of 'L', which is spring returns to stop the front roller it can turn again. HP has used a material damping on the solenoid to calm the activation of the solenoid clicking noise. Over that time off and all that remains is the glue that held up. When the solenoid activates arm 'L' hit the Center and glue residue prevents the arm of his return in time to prevent it from stopping the roll and therefore another sheet is fed. You need to access the solenoid which is behind the main landing gear on the right side. Takes a lot of work and you will need the maintenance manual. Once you have access to the solenoid, you remove, unhook the spring and remove the arm of 'L '. Then you clean the residues of glue on the edge of the coil and everything on the arm of 'L '. You then ask a material felt on the edge when you remove the glue. Put everything back together and it should work another 12 years without problem. Good luck.

Tags: HP Printers

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