Cause for repeating black spot?

[blackcat4866]

Re: Cause for repeating black spot?

...
Good to know the circumference of a drum. Why do you say "organic drum"? Are there non-organic drums?

When I first started doing this there were Selenium Tellurium drums, Arsenic TriSelenide drums, and Cadmium drums. Then came Organic drums and Silicon drums, and that's mostly all that you'll see now.

I remember hearing about somebody who died of Selenium poisioning that worked in one of the drum manufacturing facilities. But it was incredibly unlikely that a tech could get a lethal dose of Selenium just installing drums.
=^..^=

[tsbservice]

Re: Cause for repeating black spot?

ok if there is a mark on the drum, is it in the same spot as the defect on the page? YES replace the drum unit in question. Is the mark on the end of the drum out of paper path?

Those are repeative you know. I like to print it on A3 paper and measure the distance then divide the result by 3.14. Then measure/compare some more diameters
Often drums and heat rollers have very similar circumference so precision is important just rolling paper and comparing with cylinder inside machine isn't enough.

[slimslob]

Re: Cause for repeating black spot?

When I first started doing this there were Selenium Tellurium drums, Arsenic TriSelenide drums, and Cadmium drums. Then came Organic drums and Silicon drums, and that's mostly all that you'll see now.

I remember hearing about somebody who died of Selenium poisioning that worked in one of the drum manufacturing facilities. But it was incredibly unlikely that a tech could get a lethal dose of Selenium just installing drums.
=^..^=

The problem came in when someone the wrong polishing compound on the Arsenic TriSelenide drums. It could release arsenic gas, the most dangerous form of arsenic.

[Phil B.]

Re: Cause for repeating black spot?

Those are repeative you know. I like to print it on A3 paper and measure the distance then divide the result by 3.14. Then measure/compare some more diameters
Often drums and heat rollers have very similar circumference so precision is important just rolling paper and comparing with cylinder inside machine isn't enough.

Yeah a while back the rollers were different sizes. So the rolled paper trick could be used pretty well.
But in today's time that trick is out the window.

Sent from my SM-G960U using Tapatalk

[bret@cos.flag.org]

Re: Cause for repeating black spot?

Ok, I changed out the black drum, and the repeating black spot went away. I ran color calibrations last night and all was well.

Now today the users are saying the colors are not properly aligned. They're trying to run the Auto Correct Color mismatch and it is saying that it was cancelled and to try running it again, and if that fails to call Support. So they're calling me.

Any ideas what might cause that to fail? Obviously it could be something to do with the drum just installed, but would I need to go back there and open up the machine again? If so any recommendations as to what to look for? All seemed fine when I left it yesterday.

Thanks.

[Phil B.]

Re: Cause for repeating black spot?

Ok, I changed out the black drum, and the repeating black spot went away. I ran color calibrations last night and all was well.

Now today the users are saying the colors are not properly aligned. They're trying to run the Auto Correct Color mismatch and it is saying that it was cancelled and to try running it again, and if that fails to call Support. So they're calling me.

Any ideas what might cause that to fail? Obviously it could be something to do with the drum just installed, but would I need to go back there and open up the machine again? If so any recommendations as to what to look for? All seemed fine when I left it yesterday.

Thanks.

clean the patch sensors on the belt... clean cloth NO IPA

[mga]

Re: Cause for repeating black spot?

Ok, I changed out the black drum, and the repeating black spot went away. I ran color calibrations last night and all was well.

Now today the users are saying the colors are not properly aligned. They're trying to run the Auto Correct Color mismatch and it is saying that it was cancelled and to try running it again, and if that fails to call Support. So they're calling me.

Any ideas what might cause that to fail? Obviously it could be something to do with the drum just installed, but would I need to go back there and open up the machine again? If so any recommendations as to what to look for? All seemed fine when I left it yesterday.

Thanks.

Did you fit a new oem drum they not cheap on these machines

[bret@cos.flag.org]

Re: Cause for repeating black spot?

Did you fit a new oem drum they not cheap on these machines

Yes it's brand new from Canon, sealed. Not generic.

[bret@cos.flag.org]

Re: Cause for repeating black spot?

clean the patch sensors on the belt... clean cloth NO IPA

I searched for an applicable definition of IPA and I'm supposing you mean Isopropyl alcohol.

Ok. would I need to remove the ITB to get to the patch sensors? I'm looking through the Service Manual and it seems so.

[bret@cos.flag.org]

Re: Cause for repeating black spot?

I got an opinion from another tech that since the drum was recently changed, that it is probably that the drum is mis-aligned which would cause that issue. He suggested to open it up and pop out and re-insert the black drum. Then re-run the Auto Correct Color mismatch procedure.

[slimslob]

Re: Cause for repeating black spot?

I searched for an applicable definition of IPA and I'm supposing you mean Isopropyl alcohol.

Ok. would I need to remove the ITB to get to the patch sensors? I'm looking through the Service Manual and it seems so.

For most MFP the patch or ID sensor assembly, depending on what the manufacturer calls it, should only be cleaned with a soft lint free cotton cloth slightly dampened with water only. Any other type of cloth can cause static that will attract contamination. Any type of solvent of cleaning liquid will either leave a film or cause damage to the sensor.

[bret@cos.flag.org]

Re: Cause for repeating black spot?

For most MFP the patch or ID sensor assembly, depending on what the manufacturer calls it, should only be cleaned with a soft lint free cotton cloth slightly dampened with water only. Any other type of cloth can cause static that will attract contamination. Any type of solvent of cleaning liquid will either leave a film or cause damage to the sensor.

Roger that.

[bret@cos.flag.org]

Re: Cause for repeating black spot?

One of the users tried the Auto Correct Color Mismatch process again and it worked this time. And they're happy with the colors.

I'm going to let it be for a while and check back with them.

[slimslob]

Re: Cause for repeating black spot?

One of the users tried the Auto Correct Color Mismatch process again and it worked this time. And they're happy with the colors.

I'm going to let it be for a while and check back with them.

If the sensor is dirty it will happen on a daily basis. Get the hell out there and clean the damned sensor before you lose a customer.

[tsbservice]

Re: Cause for repeating black spot?

One of the users tried the Auto Correct Color Mismatch process again and it worked this time. And they're happy with the colors.

I'm going to let it be for a while and check back with them.

Never let the losers(i mean users) to do your job. Never ever!