Konica Minolta Bizhub C224

[Duhstracted]

IMG_0655 tells the whole story. in the 30% bars crossfeed you'll see distinct voids in black, cyan and magenta. Same voids can be seen even better on the individual 11% color pages: IMG_656, IMG_0657, IMG_0658. Causes for these voids can be:

* optical - dirty slit glass, fuzz obstructing the laser optical path (in the drum unit), dirty laser mirrors.
* charge - contaminated grid and/or charge wire. Problem can be moved to another color by swapping drums.
* drum - wear. Problem can be moved to another color by swapping drums.
* developing - observe the developer brush on the developing roller. Voids on the developing roller are caused by contamination under the doctor blade.

It can be any of these. Taking photos was a good idea.

I just dumped a lot of technical jargon on you. Ask more questions.=^..^=

We have moved the drums and the problem did not get better. I believe that you clean the silt glass with the wand that stays inside the machine, this has also been done several times and now I need a new wand cause the tech guy all but killed it. I can order another and try that. How would I observe the developer brush on the developing roller? You aren't anywhere near San Rafael are you?? lol This has been more help than the $1500 and I got a cool picture of the ventruvian man!

[blackcat4866]

IMG_0655 tells the whole story. in the 30% bars crossfeed you'll see distinct voids in black, cyan and magenta. Same voids can be seen even better on the individual 11% color pages: IMG_656, IMG_0657, IMG_0658. Causes for these voids can be:

* optical - dirty slit glass, fuzz obstructing the laser optical path (in the drum unit), dirty laser mirrors.
* charge - contaminated grid and/or charge wire. Problem can be moved to another color by swapping drums.
* drum - wear. Problem can be moved to another color by swapping drums.
* developing - observe the developer brush on the developing roller. Voids on the developing roller are caused by contamination under the doctor blade.

It can be any of these. Taking photos was a good idea.

I just dumped a lot of technical jargon on you. Ask more questions.=^..^=

[danbb]

Here are the test pages. The scanner isn't do them appropriate justince but I think you van get the idea

Did you still have the magenta and yellow drums swapped when you printed these?

[Duhstracted]

Try these patterns:

70% cyan image will not present the issue, but 11% cyan may. It's the 5% to 11% fill images that show finer quality issues.

Here are the test pages. The scanner isn't do them appropriate justince but I think you van get the idea

[blackcat4866]

Try these patterns:

70% cyan image will not present the issue, but 11% cyan may. It's the 5% to 11% fill images that show finer quality issues.

[kingarthur]

No one here commented on the invoice. 8 hours labor @ $90 per hr to install a transfer belt, drum, & developer unit. Something is wrong here. That work should take less than 1 hour. You have to tell the tech he fixes the machine for no additional charge or you don't pay the original invoice! If a tech can't diagnose that issue within 1 hour he doesn't know what he is doing, and you should call a different tech. I hate this type of crap, it gives all us techs a bad name. Plus that is a 15 yr old copier, why would you put $1500 into that old machine. You could get a newer C258 for around $2k.

Show the tech this post if you want to.

I've just got to this post, I was also wondering how any half decent tech can spend 8 hours on a machine. Should never spend more than an hour diagnosing and fitting those parts

[Ziggy]

No one here commented on the invoice. 8 hours labor @ $90 per hr to install a transfer belt, drum, & developer unit. Something is wrong here. That work should take less than 1 hour. You have to tell the tech he fixes the machine for no additional charge or you don't pay the original invoice! If a tech can't diagnose that issue within 1 hour he doesn't know what he is doing, and you should call a different tech. I hate this type of crap, it gives all us techs a bad name. Plus that is a 15 yr old copier, why would you put $1500 into that old machine. You could get a newer C258 for around $2k.

Show the tech this post if you want to.

I was focused on the copy quality issue but you are correct on the amount of time it should take and the age of the machine . I also just noticed they charged a shipping and handling fee. Don't know why that would be done either

[copyman]

No one here commented on the invoice. 8 hours labor @ $90 per hr to install a transfer belt, drum, & developer unit. Something is wrong here. That work should take less than 1 hour. You have to tell the tech he fixes the machine for no additional charge or you don't pay the original invoice! If a tech can't diagnose that issue within 1 hour he doesn't know what he is doing, and you should call a different tech. I hate this type of crap, it gives all us techs a bad name. Plus that is a 15 yr old copier, why would you put $1500 into that old machine. You could get a newer C258 for around $2k.

Show the tech this post if you want to.

[Duhstracted]

Thank you so much for all of your help.

[Ziggy]

is there a way to test if it is the yellow developer?

You would have to pull the yellow developer unit. I don't recommend this for a user. You can cost yourself more if your not careful

[Ziggy]

In Yellow?
If yes try cleaning the laser slit glass with the wand in the front door. If you still have problem with yellow then you may have a yellow developer unit problem. If that is the case its time to call your tech back out.

[Duhstracted]

is there a way to test if it is the yellow developer?

[Duhstracted]

i move the drum unit from magenta to yellow and printed and it was still there.

[Duhstracted]

uhm i googled a picture of Cyan and printed it. I am sure you are hysterically laughing at this point.

[Ziggy]

I do not know how to do that. 😫

how did you run the cyan print posted?