[Misc] Canon ir7086 "stripes"

[DIMM]

Hello!
I have a problem with a Canon ir7086 with stripes when printing a "PG6" (see the attached pdf).
Have changed developing assy and all corna assy.
Can anyone help me solve this problem?
Regards / Dim

[Iommanxman]

Re: Canon ir7086 "stripes"

Looking at the image. That definately looks like something to do with Charge or even Laser. I would conecetrate on the Main charge corona and grid to begin with. You also have a white stripe across the botton of the page (left to right) which looks like a laser issue.

[DIMM]

Re: Canon ir7086 "stripes"

I have tried to change the Main Charge Corona again without success. The whitestripe across the botton of the page has been there a few weeks. But beyond their main printing area.
Can laser device cause even the other stripes over a whole page, like this print ?

[Iommanxman]

Re: Canon ir7086 "stripes"

Laser Unit's can do very strange things. I have seen them do things like this in the past but it is very rare. There was a modified Laser Unit for the IR7086 if I remember rightly. Get in touch with your Canon tech support and they should be able to give you some more info.

[Rachid.Akli]

Re: Canon ir7086 "stripes"

Before changing the laser unit (the diode assembly is also available for this model), you can try to clean the drum with the powder CK-0429-000 (mix it with alcohol).

Rachid.

[Iommanxman]

Re: Canon ir7086 "stripes"

I agree with rachid.akli. Sometimes it is best to give things a good clean. Try cleaning out the laser and drum unit section. Have you replaced the main charge corona or the transfer corona? The issue looks like main charge to me though.....

[DIMM]

Re: Canon ir7086 "stripes"

Thanks for your replies
This machine gives me a headache. I have replaced all three Coronas,
and developer. Will clean the laser and drum unit section tomorrow.
This printer has printed out 8394396 prints now.

Whats the lifetime for this serie?

[Rachid.Akli]

Re: Canon ir7086 "stripes"

The expected machine life is 24 000K.
The expected drum life is 6 000K.
I send you an attachment that might help you....


Rachid.

[Herrmann]

Re: Canon ir7086 "stripes"

Have a look at the new developer assy, you will see some blue and yellow rollers, if i remember correctly, the yellow rollers are the big ones, they are rotating on the drum surface to assure a defined distance between developer cylinder and drum surface. Check drum carefully, where the rollers contact the drum; any toner debris or damages in the surface will make the developing unit hop, resulting in such an image

[DIMM]

Re: Canon ir7086 "stripes"

The expected machine life is 24 000K. The expected drum life is 6 000K. I send you an attachment that might help you.... Rachid.

This means the drum is 2000K over its approximate lifetime now.

[teckat]

Re: Canon ir7086 "stripes"

This means the drum is 2000K over its approximate lifetime now.

Estimated Life
GPR-7 Drum 6749A003AA == 6,000,000 prints/copies

what do normal prints look like ??

post a PG4 (blank) is it foggy ??
& a PG 7 (solid black)==check>>>COPIER>DISPLAY>DPOT>VDM=between 390
and 460?


laser.JPG

[Rachid.Akli]

Re: Canon ir7086 "stripes"

This means the drum is 2000K over its approximate lifetime now.

Yes sir.

Rachid.

[DIMM]

Re: Canon ir7086 "stripes"

Estimated LifeGPR-7 Drum 6749A003AA == 6,000,000 prints/copieswhat do normal prints look like ??post a PG4 (blank) is it foggy ??& a PG 7 (solid black)==check>>>COPIER>DISPLAY>DPOT>VDM=between 390and 460?

Here is the PG7, PG4 was perfect white, the WDM=370.

Have a look at the new developer assy, you will see some blue and yellow rollers, if i remember correctly, the yellow rollers are the big ones, they are rotating on the drum surface to assure a defined distance between developer cylinder and drum surface. Check drum carefully, where the rollers contact the drum; any toner debris or damages in the surface will make the developing unit hop, resulting in such an image

I cleaned ca 10 mm of the drum surface in both ends from toner debris, that rotate against the yellow rollers. And that was the solution this time. PG6 is acceptable now but not perfect in drum rotation direction, and WDM=360.

Thank you all for your tips, drum should be replaced soon to get better quality.

[Herrmann]

Re: Canon ir7086 "stripes"

regarding the white line at your print, did you check and clean the dust proof glass above the drum?

[DIMM]

Re: Canon ir7086 "stripes"

Before changing the laser unit (the diode assembly is also available for this model), you can try to clean the drum with the powder CK-0429-000 (mix it with alcohol). Rachid.

The powder CHOROX A-31 (mix), was very good for a worn drum.

regarding the white line at your print, did you check and clean the dust proof glass above the drum?

The white line was from the dust proof glass.
(The old technician who was my supervisor told me that it was a diode. And I have never doubted because I thought he checked it out. and I did not know about the dust proof glass)

Thank you very much and
Best regards