shhbah

asked Nov 18, 2019 at 10:05am
Hp HP LaserJet 2420D

Laserjet 2420 2430 paper jam already cleaned solenoids

Hi,

I have a laserjet 2430tn which as same as 2420 models.... Feeding from tray 1, I am getting paper jams. It seems like it feeds a 2nd page without pausing, like one long continuous page feed. Which causes the paper to be jammed, requiring the toner cart to be pulled, paper inside to be removed, then it will be good again for a little bit.

I already torn the printer down and removed all the sticky pads from both solenoids.

I torn the printer down and removed all the sticky pads from both solenoids because I was getting similar paper jams, but that time the symptom was that when the paper was feeding, I could multiple "chuck chunk chunk" sounds -- which I think was the solenoid having problem.

After cleaning the gunk off the solenoids, that noise disappeared and I only hear one crisp chunk from the solenoid, but now I am getting the paper seemingly feeding the next page without any pause.

by shhbah on Nov 18, 2019 at 10:06am Add comment

The only thing that can cause the roller to continue turning is the solenoid. Possibly the plate or spring came off allowing it to turn. That would explain the lack of noise. I usually put some thin sticky back felt in place of the gook.

by moe on Nov 18, 2019 at 6:13pm Add comment

Hi Moe,

Thanks. You are always helpful.

When I cleaned the solenoids on my old Laserjet 4L, I left them bare metal and that worked fine for many many years. In fact, it still works now but I seldom use it.

I left these solenoids on the 2430tn bare metal too. Not only did I clean them with a fluid cleaner, but I dremel polished the metal surfaces to be sure nothing sticky was left on there.

So you think I need to tear this down again, clean again, and put a felt pad on them?

Also, which solenoid is the primary one to focus on? Is it the one at the top of the printer, or the solenoid near the bottom?

Thanks

by shhbah on Nov 18, 2019 at 8:01pm Add comment

I am feeding it page-at-a-time in order to watch it. When it screws up, I see the front tray "raise then dip" (for lack of a better word) 3 times, instead of only 1 dip that it does when it works correctly.

In other words, right after the page enters the printer, instead of that tray no longer raising-and-dipping, it does that behavior 2 more times (appears to be 3 times total).

For sure sticky solenoid issue?

by shhbah on Nov 18, 2019 at 9:12pm Add comment

The tray lifts with roller rotation. The solenoid for the mf roller is just below the shaft the roller is on.

by moe on Nov 19, 2019 at 5:14pm Add comment

The tray lifts with roller rotation. The solenoid for the mf roller is just below the shaft the roller is on.

by moe on Nov 19, 2019 at 5:15pm Add comment

Hi Moe,

I tore it down again today and used a thin self-adhesive velcro strip (soft side) on each solenoid.

So far so good, although it seemed fine a few weeks ago when I first tore it down and cleaned the solenoids and left them bare metal.

It is too soon to know whether all is well, but wow I will say that it is quiet as a mouse now. So quiet that I thought for sure that it was not feeding correctly, but it was. If it doesnt work this time, I will try to find some thin self-adhesive felt in a craft store. I checked my local walmart and they did not have anything that I could find or any employee could find.

by shhbah on Nov 19, 2019 at 9:32pm Add comment