Bizhub C224e: Problem with printing cyan

[Leonard590]

Greetings kind strangers,

we recently got hold of a used Bizhub C224e that has a problem printing cyan (the other colors are printed correctly).

This is what the gradation test looks like (printed on A3).
Bild_2024-01-16_093320489.jpg

Consumable life is given as follows:
Developing Unit 98%
Drum 69%
Transfer Roller 92%
Image transfer belt 69%

Can you point me into the right direction as to which unit may cause this problem?
Kind regards

[techsxge]

Re: Bizhub C224e: Problem with printing cyan

Could be a Drum issue. Switch the cyan drum with the yellow ormagenta one and see if that changes anything

[tsbservice]

Re: Bizhub C224e: Problem with printing cyan

Could be a Drum issue. Switch the cyan drum with the yellow ormagenta one and see if that changes anything

In this case switching drums has nothing to do with depleted developer.
Time to call good KM tech.

[techsxge]

Re: Bizhub C224e: Problem with printing cyan

In this case switching drums has nothing to do with depleted developer.
Time to call good KM tech.

but the pattern looks more like drum to me?
or am i really that sick that i cant even recognize the error pattern anymore?

[Albonline]

Re: Bizhub C224e: Problem with printing cyan

Greetings kind strangers,

we recently got hold of a used Bizhub C224e that has a problem printing cyan (the other colors are printed correctly).

This is what the gradation test looks like (printed on A3).
[ATTACH=CONFIG]61173[/ATTACH]

Consumable life is given as follows:
Developing Unit 98%
Drum 69%
Transfer Roller 92%
Image transfer belt 69%

Can you point me into the right direction as to which unit may cause this problem?
Kind regards

the developer unit is empty, you will need to determine why and refill, or better yet replace the cyan units. the charge system in the drum unit is probably fouled from toner mist.

[copyman]

Re: Bizhub C224e: Problem with printing cyan

Cyan developer dumping is a common issue most of the time because of over life drums shorting out. You will need to replace any overlife consumables, especially the cyan drum & add developer. Since dev units are so expensive I use aftermarket developer powder to fill dev unit that has dumped. Get level in state confirmation to 6+%
If you don't replace the over life consumables developer will dump again and you will go through this all over again!

[copier tech]

Re: Bizhub C224e: Problem with printing cyan

In this case switching drums has nothing to do with depleted developer.
Time to call good KM tech.

This is 100% correct, we see this multiple times per month.

You need to replace the DV-512C cyan developer unit part number A2XN0KD

[copyman]

Re: Bizhub C224e: Problem with printing cyan

This is 100% correct, we see this multiple times per month.

You need to replace the DV-512C cyan developer unit part number A2XN0KD

I also see this multiple times per month.

Repeat... you do NOT have to replace complete DV unit at $500 each! Just buy a bag of aftermarket cyan developer for $30, add around half a bag using a funnel while turning gear on end.

I do recommend using "genuine" toners in all the Kon/Min color models.

[Hansoon]

Re: Bizhub C224e: Problem with printing cyan

but the pattern looks more like drum to me?
or am i really that sick that i cant even recognize the error pattern anymore?

[techsxge]

Re: Bizhub C224e: Problem with printing cyan

[copyman]

Re: Bizhub C224e: Problem with printing cyan

Agree the OP's photo shows a classic example of depleated developer. But the reason it depleated has to be addressed and that is usually an over life drum. That is the point I was trying to make.

[kingarthur]

Re: Bizhub C224e: Problem with printing cyan

Definite DV unit depletion, as well as replacing cyan DV unit, possibly the drum too as previously stated, any units over life need replacing - but you may also have to reduce the TCR level for cyan by 1, so go from 0 to -1. if the problem reoccurs, then go down to -2, you can go as far as -3. it's under Image Processing Adjustment

[tsbservice]

Re: Bizhub C224e: Problem with printing cyan

Definite DV unit depletion, as well as replacing cyan DV unit, possibly the drum too as previously stated, any units over life need replacing - but you may also have to reduce the TCR level for cyan by 1, so go from 0 to -1. if the problem reoccurs, then go down to -2, you can go as far as -3. it's under Image Processing Adjustment

All of this stuff plus I tend to replace ozone filter and clean ducts after removal of drums, devs and belt. I also use Konica jig for vacuum cleaner whenever it's possible(higher speed machines).

[allan]

Re: Bizhub C224e: Problem with printing cyan

The cyan air vacuum duct does not work as well as for magenta yellow or black on the 55ppm and lower 4 series machines. Design issue I would think. On ever call I remove the cyan drum and clean off the charge assembly with a brush and a syringe bulb to blow out loose toner. Cleaning the toner filter also helps, that is if that model come with one. The toner on the charge assembly will cause all kinds of issues including drawing the developer out of the dev tank. Every 200K prints or so I remove the developer tank and clean out the dusting suction ducts then I use a long pipe attachment I made for this task to clear out the suction port entrances that gets clogged.

Easy enough to just top the developer up again.

[tsbservice]

Re: Bizhub C224e: Problem with printing cyan

On all the 4 series machines (55PPM and lower) there is a design issue with the air suction duct that vacuums out toner dusting due to normal operation. This is only the case with Cyan. Toner dust gets onto the charge corona unit leading to all kinds of trouble. On every service call I do on these 4 series machines I remove the Cyan drum and clean the charge unit with a brush and air that and cleaning the toner filter if that model has one. Every 200K prints I would recommend removing the cyan developer unit and use a long pipe attachment for your toner vacuum to suck out all the toner from the entrance to the duct.

Big Off topic:

Hey allan, I did Toshy 20 years ago with some great colleagues we were 'dream team' and we are still friends.
Nothing could stop us. If a was to choose 5 techs for second 'dream team' you will be instant choice