View Full Version : KM C280 print quality problem
Lakatom
02-22-2021, 02:30 PM
Hello there,
By default, the printer does the following problem:
48375
If i swap the Cyan drum for Magenta drum:
48376
i don't understand the logic, could anyone explain?
Yours sincerely, Lakatom
CP-1015
02-22-2021, 02:56 PM
How are the Level Histroy values for cyan and yellow?
If ok new blades for cyan and yellow else new drums.
wjurls
02-22-2021, 03:37 PM
What are the drum counts? Are they near or past yield?
Hishamawada
02-22-2021, 03:50 PM
As mentioned before , it's a drum issue .
For yellow it seems only a drum blade issue
Cyan seems a drum issue. If you want u can try adjusting the background level or adjust the primary transfer voltage. it might give you more time before u change it
Sent from my SM-G610F using Tapatalk
Synthohol
02-22-2021, 04:27 PM
I beg to differ, the cyan dv is shot. Look at the diagonal voids on cyan blocks.
Maybe a yellow drum issue too but the cyan dv unit definitely needs to be replaced.
tsbservice
02-22-2021, 04:55 PM
Print halftone test patterns from service mode at some diferent densities. That would expose faulty parts.
Lakatom
02-22-2021, 06:29 PM
48378
Cyan got a new blade for a month, but the corona unit have a "foil", its cr*p, i don't know if that could be a problem.
How are the Level Histroy values for cyan and yellow?
If ok new blades for cyan and yellow else new drums.
Lakatom
02-22-2021, 06:32 PM
45-50%
What are the drum counts? Are they near or past yield?
Lakatom
02-22-2021, 06:46 PM
https://imgur.com/1LXhCTN
https://imgur.com/tG424HO
https://imgur.com/74caMs6
https://imgur.com/HG7ulwk
https://imgur.com/RUZQEtT
I could not change the density :confused:
Print halftone test patterns from service mode at some diferent densities. That would expose faulty parts.
tsbservice
02-22-2021, 06:59 PM
https://imgur.com/1LXhCTN
https://imgur.com/tG424HO
https://imgur.com/74caMs6
https://imgur.com/HG7ulwk
https://imgur.com/RUZQEtT
I could not change the density :confused:
Hit the clear button and then choose 128 with keys.
Hishamawada
02-22-2021, 07:18 PM
According to ur photos , since the cyan drum is on magenta now , then its a drum issue (the drum itself).
The yellow lines if not visible on the yellow prints as white lines then its a blade issue.
As i stated before u might play around the magenta drum . Better swap it on yellow and if issue is still visible on prints adjust the background and primary voltage.
Sent from my SM-G610F using Tapatalk
Synthohol
02-22-2021, 08:32 PM
Always print the cmyk gradation test pages. All 4.
So much more revealing of issues.
1 black pattern unfortunately does not help with a color problem.
blackcat4866
02-23-2021, 12:03 AM
Try this set of originals:
=^..^=
CP-1015
02-23-2021, 08:20 AM
48378
Cyan got a new blade for a month, but the corona unit have a "foil", its cr*p, i don't know if that could be a problem.
And table number?
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