Yellow color is not printing Konica Minolta C224e

[tsbservice]

Re: Yellow color is not printing Konica Minolta C224e

hey i got the same error...

However, it is a C364e. First the power supply was defective.
After we exchanged the power supply, it suddenly stopped printing the color yellow.

We renewed Dev + Drum Yellow genuine.
Then we renewed the HV, then the PWB Assy (FRB)...
And now I'm considering replacing the laser/PH.

What was the solution here? Did anyone else have the problem?

Thanks
Tobi

What will happen if you block a part of laser window for yellow and print full bleed yellow page?
I think you skipped some troubleshooting steps and jumped on boards which isn't always good idea

[hobbele]

Re: Yellow color is not printing Konica Minolta C224e

I think you skipped some troubleshooting steps and jumped on boards which isn't always good idea

You are absolutely right
Unfortunately, it had to be done quickly and there was still an old machine standing around to be cannibalized. So we just started... It was the laser unit. I can now print yellow or all colors again

I still don't understand why it's only yellow but okay... I have to take a closer look at how the laser works so that I understand it I think

[tsbservice]

Re: Yellow color is not printing Konica Minolta C224e

You are absolutely right
Unfortunately, it had to be done quickly and there was still an old machine standing around to be cannibalized. So we just started... It was the laser unit. I can now print yellow or all colors again

I still don't understand why it's only yellow but okay... I have to take a closer look at how the laser works so that I understand it I think

Thanks for letting us know your findings.

[femaster]

Re: Yellow color is not printing Konica Minolta C224e

You are absolutely right
Unfortunately, it had to be done quickly and there was still an old machine standing around to be cannibalized. So we just started... It was the laser unit. I can now print yellow or all colors again

I still don't understand why it's only yellow but okay... I have to take a closer look at how the laser works so that I understand it I think

One of our techs had a similar issue with a C364e. The only difference is that for him it was the cyan. It wasn't completely blank of cyan, but was so light that on a full 255 halftone, it looked like it outputting at maybe a 32 level, while all others were the full 255. Tried all the usual suspects for a single color issue, and ultimately it was replaced laser unit that brought cyan back to normal.

[hobbele]

Re: Yellow color is not printing Konica Minolta C224e

One of our techs had a similar issue with a C364e. The only difference is that for him it was the cyan. It wasn't completely blank of cyan, but was so light that on a full 255 halftone, it looked like it outputting at maybe a 32 level, while all others were the full 255. Tried all the usual suspects for a single color issue, and ultimately it was replaced laser unit that brought cyan back to normal.

for me it was also a C364e!

can you explain how the error occurs? I disassembled the laser and saw nothing

[allan]

Re: Yellow color is not printing Konica Minolta C224e

How about some half-tones. That will help a ton.

[strider5555]

Re: Yellow color is not printing Konica Minolta C224e

I had a similar issue on a C258, would not print yellow, but other colours were fine. Went through all the troubleshooting, swapped m drum for y, tried different Y dev, replace HVT, power supply, and PH unit, all to no effect. Transfer belt as well. It ended up being the transfer belt pressure retraction clutch, in the fuser drive assembly, and the only reason I checked that, is because the fuser drive had previously been disassembled and cleaned because of a noise issue. The clutch slipped just enough so that the Yellow 1st transfer would not pressure up against the drum, but did not affect the M and C.

[strider5555]

Re: Yellow color is not printing Konica Minolta C224e

Color registration is also off. What P codes are you getting? What are the IDC values for the front and rear sensors? Do they change? Should vary from approx 0 to 3.4 volts. If one is not changing, and I have seen this on quite a few 4, 4e and 8 series machine, then replace the IDC sensors. Same sensors for 4, 4e and 8 series, so if you have a parts machine, replace the whole bracket with 2 sensors, and then redo gradations

[emujo2]

Re: Yellow color is not printing Konica Minolta C224e

Just has one that reproduced the color test page perfectly, yellow gradation pattern was spot on. P codes and the inability to run stabilization. Customers print jobs with yellow came out pink..Tried Y dev and rear IDC, but turned out to be the print head.

[tsbservice]

Re: Yellow color is not printing Konica Minolta C224e

I had a similar issue on a C258, would not print yellow, but other colours were fine. Went through all the troubleshooting, swapped m drum for y, tried different Y dev, replace HVT, power supply, and PH unit, all to no effect. Transfer belt as well. It ended up being the transfer belt pressure retraction clutch, in the fuser drive assembly, and the only reason I checked that, is because the fuser drive had previously been disassembled and cleaned because of a noise issue. The clutch slipped just enough so that the Yellow 1st transfer would not pressure up against the drum, but did not affect the M and C.

This is wonderful story. First time hear of such. Thanks for warning us.
That's why I love this game! You never know what comes next

[tsbservice]

Re: Yellow color is not printing Konica Minolta C224e

Just has one that reproduced the color test page perfectly, yellow gradation pattern was spot on. P codes and the inability to run stabilization. Customers print jobs with yellow came out pink..Tried Y dev and rear IDC, but turned out to be the print head.

Interesting, Thank you Ed.

[femaster]

Re: Yellow color is not printing Konica Minolta C224e

for me it was also a C364e!

can you explain how the error occurs? I disassembled the laser and saw nothing

The cyan color issue happened about a month ago for us. I still have the laser unit sitting on a shelf with the samples and a note on it. Unfortunately I have not had the time to look into what might be causing the problem yet.

[REGSIS]

Re: Yellow color is not printing Konica Minolta C224e

Has anyoned tried printhead reset?
Just an idea.