cleaning solenoid on HPLJ6P
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From: Alan on 3 May 2010 23:40 I'm having some paper jam issues with my HPLJ6P. I've been advised that I should clean the solenoids. Can anyone tell me more specifically how to go about that? I do have the service manual but that doesn't mention this procedure. Also it looks like a bit of a struggle to remove the case to get at the innards, any hints on doing that?
From: Baz on 6 May 2010 03:23 "Alan" <none(a)none.com> wrote in message news:ne5vt5hb1s34o0jvc10iji0u9fk6gt5552(a)4ax.com... > I'm having some paper jam issues with my HPLJ6P. > I've been advised that I should clean the solenoids. > > Can anyone tell me more specifically how to go about that? > I do have the service manual but that doesn't mention this procedure. > > Also it looks like a bit of a struggle to remove the case to get at > the innards, any hints on doing that? > > Hi Alan, I had once this problem with my old HP Laserjet3-P. Took me ages to diagnose, but as usual, I found a tip on the web, which put me on the right path. I think they are referring to cleaning the sticky residue that remains after the "armature residual gap" material disintegrates and leaves it's glue. Remove the armatures if possible and clean off the sticky stuff. You need to fit some more material into the the armature gap to prevent the solenoid "magnetically sticking". It provides a small air gap, and stops residual magnetism from holding the armature. I seem to recall I've used small pieces of stick on felt, but almost any non-magnetic material will do, if you can keep it there. I temporarily used some clear plastic from a PET bottle at one stage, but found the stick-one felt convenient. The sticking armatures will affect the release time of the solenoids and this causes the paper jam problem. How to physically do it depends on how mechanically able you are. I'm surprised the service manual doesn't tell you how to remove the case. After that it's usually just screws. regards Barry
From: LLCoolG on 6 May 2010 22:41 On Thu, 6 May 2010 17:23:35 +1000, "Baz" <nospam(a)nospam.com> wrote: > >"Alan" <none(a)none.com> wrote in message >news:ne5vt5hb1s34o0jvc10iji0u9fk6gt5552(a)4ax.com... >> I'm having some paper jam issues with my HPLJ6P. >> I've been advised that I should clean the solenoids. >> >> Can anyone tell me more specifically how to go about that? >> I do have the service manual but that doesn't mention this procedure. >> >> Also it looks like a bit of a struggle to remove the case to get at >> the innards, any hints on doing that? >> >> >Hi Alan, > >I had once this problem with my old HP Laserjet3-P. Took me ages to >diagnose, but as usual, I found a tip on the web, which put me on the right >path. > >I think they are referring to cleaning the sticky residue that remains after >the "armature residual gap" material disintegrates and leaves it's glue. >Remove the armatures if possible and clean off the sticky stuff. You need >to fit some more material into the the armature gap to prevent the solenoid >"magnetically sticking". It provides a small air gap, and stops residual >magnetism from holding the armature. I seem to recall I've used small >pieces of stick on felt, but almost any non-magnetic material will do, if >you can keep it there. I temporarily used some clear plastic from a PET >bottle at one stage, but found the stick-one felt convenient. > >The sticking armatures will affect the release time of the solenoids and >this causes the paper jam problem. > >How to physically do it depends on how mechanically able you are. I'm >surprised the service manual doesn't tell you how to remove the case. After >that it's usually just screws. > >regards >Barry > Almost every one I worked on for pull jams was the pickup roller. EZ fix, try that first
From: Alan on 7 May 2010 05:04 On Thu, 6 May 2010 17:23:35 +1000, "Baz" <nospam(a)nospam.com> wrote: > >"Alan" <none(a)none.com> wrote in message >news:ne5vt5hb1s34o0jvc10iji0u9fk6gt5552(a)4ax.com... >> I'm having some paper jam issues with my HPLJ6P. >> I've been advised that I should clean the solenoids. >> >> Can anyone tell me more specifically how to go about that? >> I do have the service manual but that doesn't mention this procedure. >> >> Also it looks like a bit of a struggle to remove the case to get at >> the innards, any hints on doing that? >> >> >Hi Alan, > >I had once this problem with my old HP Laserjet3-P. Took me ages to >diagnose, but as usual, I found a tip on the web, which put me on the right >path. > >I think they are referring to cleaning the sticky residue that remains after >the "armature residual gap" material disintegrates and leaves it's glue. >Remove the armatures if possible and clean off the sticky stuff. You need >to fit some more material into the the armature gap to prevent the solenoid >"magnetically sticking". It provides a small air gap, and stops residual >magnetism from holding the armature. I seem to recall I've used small >pieces of stick on felt, but almost any non-magnetic material will do, if >you can keep it there. I temporarily used some clear plastic from a PET >bottle at one stage, but found the stick-one felt convenient. > >The sticking armatures will affect the release time of the solenoids and >this causes the paper jam problem. > >How to physically do it depends on how mechanically able you are. I'm >surprised the service manual doesn't tell you how to remove the case. After >that it's usually just screws. The manual does say how to take it apart; what I meant was that it does not mention anything about cleaning solenoids. Also, in this model it appears you have to flex the case to get it on and off, and I think the plastic is getting a bit brittle with age. And embarrassingly, I'm not sure just where the solenoids in question are and what it the solenoid actually looks like. -- any pointers to an image? I can see in a diagram in the manual "SL1 Tray 2 Solenoid" which I guess is the one, as it's pickup from Tray 2 (the lower cassette) that is the problem. It feeds from the MP tray at the front (Tray 1) okay. The diagram that shows the location is fairly abstract, and I'm not sure how much I need to dismantle the printer to get to it. If you're interested, you can find the manual here: http://www.freeprintermanuals.com/PM/HP%20LaserJet%205P,%206P%20Service%20Manual.pdf
From: Alan on 7 May 2010 05:08
On Thu, 06 May 2010 21:41:11 -0500, LLCoolG <LLCGtt(a)hotmail.com> wrote: >Almost every one I worked on for pull jams was the pickup roller. EZ fix, try >that first Thanks, but I've tried that. I clean the roller on my 5MP every now and them when it starts to jam and then it's okay, so I know how to do that, but this seems to be different. Also the 6MP does pickup from the front MP tray, which uses the same pickup roller as the cassette, so I don't think it is the roller. |