C4502 grinding only while printing/copying

[tinfox]

I thought it might be the fuser, but when I got there the fuser seemed fine. The K drum is a bit hard to turn relative to the other drums.

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[GIUBOSS]

Re: C4502 grinding only while printing/copying

Then try to open the drum unit and developer and inspect them if you think they are blocked ... So print grainy? Error codes? I had encountered a similar noise and had solved with the firmware update which corrected the phase of the fuser.

[tinfox]

Re: C4502 grinding only while printing/copying

Then try to open the drum unit and developer and inspect them if you think they are blocked ... So print grainy? Error codes? I had encountered a similar noise and had solved with the firmware update which corrected the phase of the fuser.

I'm going to run up all the drums and transfer belt tomorrow. I don't know why it would be the firmware after all this time. Idk

[Klydon]

Re: C4502 grinding only while printing/copying

Lot of questions, but not much information.

Color only or does it do it on B&W as well?
Have you tried running output checks just to run a specific motor at a time to see if you can isolate what might be making the noise to a specific section of the machine?

[tinfox]

Re: C4502 grinding only while printing/copying

I ran out of time to run I/o tests. Didn't even try color.

I'll do that tomorrow if the black drum unit doesn't fix it.

[slimslob]

Re: C4502 grinding only while printing/copying

I'm going to run up all the drums and transfer belt tomorrow. I don't know why it would be the firmware after all this time. Idk

Everything is possible. There was a bulletin put out having to do with a chattering noise from the fusing unit. rfg056159.pdf

Could also be the pressure roller gear. rfg055949.pdf

I have also had problems with the rear sintered bushing for the exit roller in the paper exit section have the heat form the fusing unit boil the oil out of it and cause a lacquer build up on the shaft making it hard to turn. Eventually it will bind causing a jam and stripping out the drive gear for the section.

[tinfox]

Re: C4502 grinding only while printing/copying

I noticed these faint white lines in the triangle.

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I replaced the k drum. It's good now.

[luca72]

Re: C4502 grinding only while printing/copying

I thought it might be the fuser, but when I got there the fuser seemed fine. The K drum is a bit hard to turn relative to the other drums.

Shared album - tinfox - Google Photos

try with sp 804 (output check) at various speed, to test various mechanism, to identify the source noise, if you want test the fuser cinematic rotation, remember to put out the waste toner bottle, for not burn the fuser sleeve!