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‎09-15-2020 05:27 AM - edited ‎09-15-2020 05:35 AM

HP Recommended
Product: LaserJet CM6040
Operating System: macOS 10.14 Mojave

Hello
My LaserJet CM6040 have some issues with the print quality and puts a lot of stripes on places where they don't belong. It is easiest to understand taking a look on the attached scans of a set of test pages that I printed out. Yellow and magenta look uninfected. Obviously blue/green color (page 1, 2, 3) is infected most, but also the grey page (5) shows stripes on the top.  However black prints in front of infected colored areas seems to be ok too...

Does anybody recognize these kind of stripes from his printer and can tell me what that means...?

Thank you!

 

112233445566

 

Category:
9 REPLIES 9

‎09-15-2020 07:31 AM

HP Recommended

As it appears to affect on cyan, the cyan drum unit or toner would be the first thing to try.

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‎09-15-2020 08:10 AM - edited ‎09-15-2020 08:11 AM

HP Recommended

Thank you for your input . I checked the status, and the levels of cartridge and drum are at 37/45%, that means they are not empty at all. Is it still possible/thinkable that one or both of these units can cause the issue?

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‎09-15-2020 08:33 AM

HP Recommended

Most likely the drum unit. If other colors are unaffected that eliminates the transfer belt or the fuser and leaves only the laser assembly, the drum and the toner. The drum is the most likely cause. Unfortunately the rated life is only one factor in many that can affect drum performance and if they have never been changed they are at least 6 years old. The Grey in the sheets is composite color (all three colors) not black and that explains the presence of the defect there.

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I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.



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‎09-15-2020 08:46 AM

HP Recommended

Thanks for the explanation, I see.

Your suggestion is to start the check by ordering a new cyan drum, and maybe another toner cartridge (cyan) if the issue still exists after the drum is changed?

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‎09-15-2020 09:46 AM

HP Recommended

I would be less worried about toner, i would start with the drum unit. As a technician that is where I would start. Unlike all in one units that you can swap colors to see if the defect follows the cartridge, the 2 part drum/toner system and keyed drums makes that impossible, so unfortunately drum replacement is the first thing to try and most likely will resolve the issue.

If you find the information provided useful or solves your problems, help other users find the solution easier by marking my post as an accepted solution. Clicking "yes" on "was this reply helpful" also increases the chances that this solution will help others.
I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.



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‎09-16-2020 01:18 AM

HP Recommended

Thank you for your help, I appreciate!
I will now order a new drum and see how it works. Keep you updated.

By the way: Is it possible to use the installed toner cartridge again after the drum is changed?

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‎09-16-2020 05:06 AM

HP Recommended

Hi

 

Yes, you need new OPC unit and yes, you can use same tubes which you use. 

I am not HP emplye.
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I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.
If my post resolve your problem please mark it as an Accepted Solution
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‎09-20-2020 09:54 AM

HP Recommended

Hello again. I now ordered a new cyan drum and hope it will solve the issue.

In the meanwhile I got observant to the test sheet of black/grey (attachment no.5 above) again. It doesn't look that terrible than the blue/green colors, but for me it is not 100% ok as well in view to the lighter stripes especially at the top part of that sheet.

What do you think, might it be necessary to buy a new drum for the black unit too?

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‎09-23-2020 03:02 AM

HP Recommended

Hi there

I think not. Printer mix cyan with black and look like black have also problem but in real not. Change Cyan first and you will see difference. 

I am not HP emplye.
Say thanks by clicking the Kudos thumb up in the post.
I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.
If my post resolve your problem please mark it as an Accepted Solution
Was this reply helpful? Yes No
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