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Kenny
09-28-2023, 09:36 AM
Good Morning,

Ive got a quality issue with a Konica Minolta C658,

Ive replaced the cyan drum for blue lines, calibrated the copier cleaned IDC sensors and all the halftones are perfect but when trying to print a document it coming out more green / blue when it should be a solid blue,

Ive printed the same document on a different C658 from the same Mac & PC and it prints perfectly,

There is no p codes on the copier and nothing is over life,

The test page looks perfect too but something is not right,

I will attached some examples,

the 2nd example is how it should print,


Has anyone else had this issue before?

tsbservice
09-28-2023, 11:38 AM
Did you put new cyan drum unit?

Profibastler
09-28-2023, 12:49 PM
Hi, did you tried change cyan toner.
Adjust color registration - SM I-103,
Imaging process adj - SM I-108.
Mix new toner in dev unit with code 50 - SM I-204
At last change deve unit.





Good Morning,

Ive got a quality issue with a Konica Minolta C658,

Ive replaced the cyan drum for blue lines, calibrated the copier cleaned IDC sensors and all the halftones are perfect but when trying to print a document it coming out more green / blue when it should be a solid blue,

Ive printed the same document on a different C658 from the same Mac & PC and it prints perfectly,

There is no p codes on the copier and nothing is over life,

The test page looks perfect too but something is not right,

I will attached some examples,

the 2nd example is how it should print,


Has anyone else had this issue before?

Markks
09-30-2023, 01:59 AM
What is the count on the rest of the consumables? If they still have a lot of life I recommend the following


Run Initialize and stabilize
Procedure
1. Call the Service Mode to the screen.
2. Touch [Imaging Process Adjustment] -> [Stabilizer].
3. Touch [Initialize+Image Stabilization].
4. Press the Start key to start Stabilizer.
The Start key turns orange and stays lit up orange during the Stabilizer sequence.
5. Stabilizer is completed when the Start key turns blue.

Then Run your Gradation Adjustment on a high grade paper making sure you put 10 sheets on top of the test pattern before scanning it. I would run it a minimum of three times for each setting.

copier tech
09-30-2023, 11:30 AM
Good Morning,

Ive got a quality issue with a Konica Minolta C658,

Ive replaced the cyan drum for blue lines, calibrated the copier cleaned IDC sensors and all the halftones are perfect but when trying to print a document it coming out more green / blue when it should be a solid blue,

Ive printed the same document on a different C658 from the same Mac & PC and it prints perfectly,

There is no p codes on the copier and nothing is over life,

The test page looks perfect too but something is not right,

I will attached some examples,

the 2nd example is how it should print,


Has anyone else had this issue before?

Is the device on genuine toner ?

femaster
10-02-2023, 02:25 AM
On my PC screen, even though the second image is what it is supposed to look like, that one looks bad to me. The people look way to "red", like they have a serious sunburn. The first one looks more "normal" to me. Could be many factors that affect that though, my uncalibrated monitor, poor color recreation when scanning you originals, etc. Just saying I like the first image better, but that's just me.
At this point, I'd follow Markks advice and see what comes of it.

allan
10-02-2023, 05:38 AM
+1 Initialize and stabilize. Check that all the settings under Image Process Adjustment are set to default first.
Can be that yellow or cyan could be under or over saturated.

allan
10-02-2023, 05:39 AM
Hi, did you tried change cyan toner.
Adjust color registration - SM I-103,
Imaging process adj - SM I-108.
Mix new toner in dev unit with code 50 - SM I-204
At last change deve unit.

Are we on the same machine here?

allan
10-02-2023, 06:06 AM
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That does not seem to be green that would be more to cyan. These new drum units seem to suffer from cleaning blade failure on cyan due to heave coverage.

The only thing off here may be you customer...

femaster
10-03-2023, 01:54 AM
On my PC screen, even though the second image is what it is supposed to look like, that one looks bad to me. The people look way to "red", like they have a serious sunburn. The first one looks more "normal" to me. Could be many factors that affect that though, my uncalibrated monitor, poor color recreation when scanning you originals, etc. Just saying I like the first image better, but that's just me.
At this point, I'd follow Markks advice and see what comes of it.


This may be due to different factors, such as an uncalibrated monitor and problems with color reproduction when scanning.

Yes, I literally pointed that out in my original post, but thanks for reiterating that.

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