At wits end with solid area issues. C3002 and C4000

[PressingPrintz]

Hello gentlemen,

I've had this issue for a while now with large solid colors always coming out uneven or "mottled" on multiple machines.

I've changed PCU's, paper transfer unit, ITB, new toner, fuser, tried many different paper types (think, thin, glossy, etc) and literally every paper setting possible as well as different file types. I believe the issue has something to do with the image not 100% being transferred from the ITB because when I stop the process mid-job, I can see a very clean SOLID image on the ITB.

I am located in a very humid area (South Florida) and it seems both of the machines are mottling large solid areas. (C3002 and C4000)

I know these machines can do better. The last image is a comparison of something printed on a small home HP laserjet and the solid areas are smooth and even.

My questions- can someone explain the concept behind increasing or decreasing the voltage of the PTU for humid climates? I've read through the service manuals but I am not understanding the proper procedure for this adjustment...

[PressingPrintz]

Re: At wits end with solid area issues. C3002 and C4000








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[slimslob]

All previous replies have been lost due to the migration.

[Zeldaman]

[PressingPrintz]

Has anybody had any tips or go-to best settings for digital gloss cover? Also- I took some time off and come back to almost everything gone on here....

[slimslob]

Finding the correct paper type setting to give the proper fusing can be a matter of trial and error.A difference of as little as 5 degrees too high or too low can cause off setting on photo glossy laser paper

[PressingPrintz]

So would you say it IS possible to get more solid looking solids on laser gloss cover? Or is this too big of an ask?