[CQ] Canon 5051i Black print is blurred

[ibruceuk]

Hi,

I'm hoping someone may be able to suggest a solution to my problem. Our charity's 5051 has started printing very blurred output but only in Black.

The photo linked to should illustrate - the text should be crisp and sharp!

I have briefly cleaned the drum and the top of the laser units but no effect. As funds are tight I am reluctant to just replace the drum for the sake of it as it isn't that old and our budget at the moment won't stretch that far.

Any ideas what might be causing this 'fuzzy' print?

TIA

Ian

PHOTO Link - Imgur: The most awesome images on the Internet

[dan7777]

Re: Canon 5051i Black print is blurred

Hi,

I'm hoping someone may be able to suggest a solution to my problem. Our charity's 5051 has started printing very blurred output but only in Black.

The photo linked to should illustrate - the text should be crisp and sharp!

I have briefly cleaned the drum and the top of the laser units but no effect. As funds are tight I am reluctant to just replace the drum for the sake of it as it isn't that old and our budget at the moment won't stretch that far.

Any ideas what might be causing this 'fuzzy' print?

TIA

Ian

PHOTO Link - Imgur: The most awesome images on the Internet

Blurred with color could be color registration. Run Test print 10 and see if there is any white or if the top and bottom are not lined up. There is a shutter over the sensors that read itb that the end breaks or sensors get dirty. I had one with very small color print blurred that I had to "scrub" the sensors with alcohol (not recommended as they say it makes it attract toner) to get the colors to line up. Even though it is black print the colors still lay over. Try and put it in black and white mode and see if same document is good. If your color registration is off most likely a black drum will not fix problem. Could be other problems like ITB belt slipping or something else. I get lines or shadows when drums get old.

[ibruceuk]

Re: Canon 5051i Black print is blurred

Hi

Thanks for your reply.

I've done as you suggest and tried test print 10, and it looks pretty much ok, actually quite sharp. There is some very slight registration issues but nothing too major.

I also tried printing with just Black but the same result with it being fuzzy. It looks as though the print is blurred or out of focus as if the laser is not focusing on the drum... could that be the case?

I removed the ITB and drums and gently cleaned the dust etc inside the printer and the laser windows (under the shutters) but still the same effect.

I have attached a scan of the test print and of the black only print. On the black print you can see the edge furthest from the front of the printer appears to be more blurred than that at the front if you know what I mean.

I do hope this is something relatively straightforward.

Thanks again,

Ian

0029_001.pdf

[randall]

Re: Canon 5051i Black print is blurred

Hi

Thanks for your reply.

I've done as you suggest and tried test print 10, and it looks pretty much ok, actually quite sharp. There is some very slight registration issues but nothing too major.

I also tried printing with just Black but the same result with it being fuzzy. It looks as though the print is blurred or out of focus as if the laser is not focusing on the drum... could that be the case?

I removed the ITB and drums and gently cleaned the dust etc inside the printer and the laser windows (under the shutters) but still the same effect.

I have attached a scan of the test print and of the black only print. On the black print you can see the edge furthest from the front of the printer appears to be more blurred than that at the front if you know what I mean.

I do hope this is something relatively straightforward.

Thanks again,

Ian

[ATTACH]34711[/ATTACH]

Thought i would chime in.....
In your last image, it looks like you have a horizontal crack in your fuser film. Look at magenta on your type 10. Replace the film and pressure roller, also may cause the blur

As far as the blurring, there is a mylar on the SALT sensor array below the ITB that can get bent and drag causing a toner buildup on it which will blur the image on the ITB prior to transfer. You can see the mylar from the rightside door cavity open.

If you check these and dont find any problems, do a P-print and compare against door and rcon cover specs. I would dcon clear and reinput values and cycle power run color mmismatch and full gradation and test.

Hope this helpped

[dan7777]

Re: Canon 5051i Black print is blurred

Hi

Thanks for your reply.

I've done as you suggest and tried test print 10, and it looks pretty much ok, actually quite sharp. There is some very slight registration issues but nothing too major.

I also tried printing with just Black but the same result with it being fuzzy. It looks as though the print is blurred or out of focus as if the laser is not focusing on the drum... could that be the case?

I removed the ITB and drums and gently cleaned the dust etc inside the printer and the laser windows (under the shutters) but still the same effect.

I have attached a scan of the test print and of the black only print. On the black print you can see the edge furthest from the front of the printer appears to be more blurred than that at the front if you know what I mean.

I do hope this is something relatively straightforward.

Thanks again,

Ian

[ATTACH]34711[/ATTACH]

That is not a color registration problem looking at the test page 10. You may have a bad fuser roller. I would take the fuser out and take apart and look at the roller. Maybe that is why it is bad on one side. I can see it on the test page. Hopefully you are using Canon toner. A lot of people here don't and have issues I usually don't see.

[zoraldinho]

Re: Canon 5051i Black print is blurred

That is not a color registration problem looking at the test page 10. You may have a bad fuser roller. I would take the fuser out and take apart and look at the roller. Maybe that is why it is bad on one side. I can see it on the test page. Hopefully you are using Canon toner. A lot of people here don't and have issues I usually don't see.

I agree about the fuser but if you are not sure it's much easier force stop before fixing.

[ibruceuk]

Re: Canon 5051i Black print is blurred

I agree about the fuser but if you are not sure it's much easier force stop before fixing.

Thanks for all the replies!

It is genuine Canon toner, I will look at the fuser film as I had noticed on the odd print that mark.

By force stop do you mean opening a cover halfway through a print job so you can look at what is on the ITB, Drum etc?

Thanks,

Ian

[dan7777]

Re: Canon 5051i Black print is blurred

Thanks for all the replies!

It is genuine Canon toner, I will look at the fuser film as I had noticed on the odd print that mark.

By force stop do you mean opening a cover halfway through a print job so you can look at what is on the ITB, Drum etc?

Thanks,

Ian

Yes, I think that is what he means. Problem is with color copier it is so different before it goes through fuser it is hard to tell on some stuff. I am sure you will see mark when you look at roller. Maybe some one tried to clear jam with something sharp like they seem to do a lot.

[ibruceuk]

Re: Canon 5051i Black print is blurred

Hi,

Sorry been so long to reply.

I did a force stop and it is just the black that is blurred on the ITB the colour is crisp.

Yes you're right the fuser film (I presume that's the orange bit) does have a small crack in it. I need to get one ordered.

I presume the mylar is the slightly clear plastic as the ITB comes round the roller. It looks clean and undamaged.

Seeing as it is before fusing any ideas what it could be?

Thanks again...

[dan7777]

Re: Canon 5051i Black print is blurred

Hi,

Sorry been so long to reply.

I did a force stop and it is just the black that is blurred on the ITB the colour is crisp.

Yes you're right the fuser film (I presume that's the orange bit) does have a small crack in it. I need to get one ordered.

I presume the mylar is the slightly clear plastic as the ITB comes round the roller. It looks clean and undamaged.

Seeing as it is before fusing any ideas what it could be?

Thanks again...

If is is just the black, take a look at the black developer. Sometimes the magnetic roller gets caked up.