MP C2051 When printing in A3 you make stripes, but not when copying.

[luca72]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

That's what I've been thinking. But as mentioned above, these pieces have already been changed.
And the weird, weird thing is that it's only when printing.

The sound, when the defect os generated. Only when printing.

When photocopying, the noise does not appear, nor does the defect.

On a mechanical level it's the same job, that's why it has me baffled. Obviously the HDD thing can't be.

I managed at home, to hear the noise, there are different sounds, isn't it that it's those plastic wheels of the exit that whistle with the metal? or the noisy fuser?

[Gift]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

I think know that noise, it's the fuser sleeve not having enough lubrication inside. It can occure at certain process speeds only. Usually it's not present if you print A4/LTR SEF because there's more grip between sleeve + press roller. Other possibility is the PCUs - noise from a dry(hardened) blade - you can try and smear some yellow toner on the drums and turn them back + forth to get some "fresh dirt" as lubrication on the blades to see if the sound vanishes (don't expect this to last long, though^^).

[GIUBOSS]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

there are technical bulletins for noises or vibrations of origin
fuser unit, sometimes also caused by pad separation in the paper tray. You can run the diagnostic tests in SP 5-804 mode, I believe.

[UNICORNico]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

I think know that noise, it's the fuser sleeve not having enough lubrication inside. It can occure at certain process speeds only. Usually it's not present if you print A4/LTR SEF because there's more grip between sleeve + press roller. Other possibility is the PCUs - noise from a dry(hardened) blade - you can try and smear some yellow toner on the drums and turn them back + forth to get some "fresh dirt" as lubrication on the blades to see if the sound vanishes (don't expect this to last long, though^^).

there are technical bulletins for noises or vibrations of origin
fuser unit, sometimes also caused by pad separation in the paper tray. You can run the diagnostic tests in SP 5-804 mode, I believe.

I think it's getting a little bit out of the way.
The main thing is not the noise, since it is something that I know how to face it.
The main problem is the relationship of the noise, with the lines that I show in the video and in the links to Google Drive. So indicate the parts that were changed.
Finally indicate, that the noise has changed, it is not as strident as that of the video, and now the lines have stopped appearing. I have no idea that it has changed, since, in the last tests I only made prints, 4 per color, to force the failure.

302 Moved

[Gift]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

I ok I missed that part with the lines - it might be related to the vibrations that came with the noise issue (probably from pcu). Those vibrations probably have an influence to the charge roller->drum "relationship".

[GIUBOSS]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

I think it's getting a little bit out of the way.
The main thing is not the noise, since it is something that I know how to face it.
The main problem is the relationship of the noise, with the lines that I show in the video and in the links to Google Drive. So indicate the parts that were changed.
Finally indicate, that the noise has changed, it is not as strident as that of the video, and now the lines have stopped appearing. I have no idea that it has changed, since, in the last tests I only made prints, 4 per color, to force the failure.

302 Moved

Is ITB new or taken from another mfp?

[UNICORNico]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

I think know that noise, it's the fuser sleeve not having enough lubrication inside. It can occure at certain process speeds only. Usually it's not present if you print A4/LTR SEF because there's more grip between sleeve + press roller. Other possibility is the PCUs - noise from a dry(hardened) blade - you can try and smear some yellow toner on the drums and turn them back + forth to get some "fresh dirt" as lubrication on the blades to see if the sound vanishes (don't expect this to last long, though^^).

Is ITB new or taken from another mfp?

The ITB and Fuser Unit, for reasons of time, belong to another MFP, located in our facilities and NEVER made any noise or defect.
The client's parts are in this device of our facilities, performing the same tests, the same conditions, and it has NOT been possible to recreate the failure which I comment on in this post. That is why the decision was made to change the "engine block" (Drive Unit Drum and Development).

[GIUBOSS]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

Only color pcdu are to be tested

[UNICORNico]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

Only color pcdu are to be tested

All tests have always been in color. Both those of the "copier mode" and those of the "printer mode".


As I said before, if I do the tests in Black, with the client's test template, (being a defect with black stripes), this defect is not generated, only printing in Color. If I make monochromatic printing (forcing printing with a single color, alternating between C,M,Y,K) the failure is not reproduced.


I don't know, if you mean that.

[GIUBOSS]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

All tests have always been in color. Both those of the "copier mode" and those of the "printer mode".


As I said before, if I do the tests in Black, with the client's test template, (being a defect with black stripes), this defect is not generated, only printing in Color. If I make monochromatic printing (forcing printing with a single color, alternating between C,M,Y,K) the failure is not reproduced.


I don't know, if you mean that.

if you have the same model, it shouldn't be difficult for you, by excluding the replaceable parts, to solve the problem

[slimslob]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

I ok I missed that part with the lines - it might be related to the vibrations that came with the noise issue (probably from pcu). Those vibrations probably have an influence to the charge roller->drum "relationship".

If the vibration was in the PCUs, then you would not be able to see it in the motion of the paper as it comes out of the exit. Different motors.

[Gift]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

If the vibration was in the PCUs, then you would not be able to see it in the motion of the paper as it comes out of the exit. Different motors.

Actually I am not able to see that from the video, but I'm also not convinced this is a PCU issue because that noise should be more "squeaky"

This sound was totally familiar to me, we called it the "dying seal" noise back in the days and it came from the fuser and only occured at certain process speeds in A4 or A3 LEF mode. Our thread starter claims he tested another fuser with the same problem, but I'm not convinced - perhaps that fuser was also very old and who knows if both machines used the same paper quality. I know that this problem is better reproduceable with smooth papers (color copy) and maybe not reproduceable with "rough"-surfaced paper because that does increase the friction and therefore helps the sleeve turning "smoothly" even if the inside lubrication is not sufficiant.

Exchanging crap parts with "a little less crap" parts can easily lead you to false conclusions.

[UNICORNico]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

if you have the same model, it shouldn't be difficult for you, by excluding the replaceable parts, to solve the problem

That is the reason to draw on experience and expertise, for a second opinion of copytechNet's technical colleagues.
If I already do the tests, which I explain, and I can not isolate the failure, obviously I come here to try to see different points of view to raise the incidence differently.

Actually I am not able to see that from the video, but I'm also not convinced this is a PCU issue because that noise should be more "squeaky"
This sound was totally familiar to me, we called it the "dying seal" noise back in the days and it came from the fuser and only occured at certain process speeds in A4 or A3 LEF mode. Our thread starter claims he tested another fuser with the same problem, but I'm not convinced - perhaps that fuser was also very old and who knows if both machines used the same paper quality. I know that this problem is better reproduceable with smooth papers (color copy) and maybe not reproduceable with "rough"-surfaced paper because that does increase the friction and therefore helps the sleeve turning "smoothly" even if the inside lubrication is not sufficiant.
Exchanging crap parts with "a little less crap" parts can easily lead you to false conclusions.

I understand what you mean, the coherent and correct thing is to change old pieces for new ones. (the new ones I already indicate in a previous post)
But the changes became provisional, since it was very difficult to isolate the specific piece that generated the defect (the stripes). And I repeat, not the fact that it makes noise, but the one that caused the stripes that I teach in the links, strangely related to noise.
All the changes were made with parts of a machine in perfect condition and so to speak, I have all the parts of the client in the test machine of the workshop and it has been IMPOSIBLEM to recreate the defect, and the client until a few days ago the failure persisted, currently the client's device, no longer generates such stripes, which has no explanation since no more changes have been made since the tests and consultations made here began. Only the fuser noise remains, which has already been solved with a change of the fuser sleeve.


I repeat that I appreciate all the help.

[Sashko]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

Change print resolution to 600x600 dpi

[luca72]

Re: MP C2051 When printing in A3 you make stripes, but not when copying.

Actually I am not able to see that from the video, but I'm also not convinced this is a PCU issue because that noise should be more "squeaky"

This sound was totally familiar to me, we called it the "dying seal" noise back in the days and it came from the fuser and only occured at certain process speeds in A4 or A3 LEF mode. Our thread starter claims he tested another fuser with the same problem, but I'm not convinced - perhaps that fuser was also very old and who knows if both machines used the same paper quality. I know that this problem is better reproduceable with smooth papers (color copy) and maybe not reproduceable with "rough"-surfaced paper because that does increase the friction and therefore helps the sleeve turning "smoothly" even if the inside lubrication is not sufficiant.

Exchanging crap parts with "a little less crap" parts can easily lead you to false conclusions.

I think it is not too difficult to fit a noisy test fuser, in place of another ... since that type of defect is widespread