[CQ] C454e cyan developer

[kenpio]

Howdy Folks,

I have a couple of these C454e machines that are eating cyan developer units. One machine just yesterday has only 9000 copies on the unit. I replaced the drum and developer previous to this change. I just sent them back to KM for their YPP. When I take out the unit there is not a brush on the mag roller, seems to be all gone? The waste toner box is a little heavy, so I think that it is going in there. The one machine that I was just at yesterday has over 1 million on it and the other one has not quite a million. One has G00-K2 and the other has G20-M1. Just throwing that out there, because the cyan developers are always backordered.

Thanks
KEN

[darkocg88]

Re: C454e cyan developer

They run out of toner, keep printing, machine uses dev, very metallic printouts tho.

Sent from my Moto E (4) Plus using Tapatalk

[Copier Addict]

Re: C454e cyan developer

Make sure the other drums are not way past yield. Drums of another colour can cause this symptom if they are too old.

[kenpio]

Re: C454e cyan developer

Here is a sample of the half tone cyan.

[kenpio]

Re: C454e cyan developer

None of the other drums or developers are over life. They are about half way through their nice little life.

[Synthohol]

Re: C454e cyan developer

have you tried replacing the toner seals?

[blackcat4866]

Re: C454e cyan developer

On a bizhub C658 I had a bad HVT that consumed developer in seconds. I'd install the cyan developing unit and with 10 seconds it was empty. =^..^=

[tsbservice]

Re: C454e cyan developer

Here is a sample of the half tone cyan.

Corkscrew output, check:
- other consumables over life
- HVT or HVT contacts leak
- clogged filters
There were some bulletins here in other topics, maybe copyman posted them, as I don't have them handy.

[copier tech]

Re: C454e cyan developer

Corkscrew output, check:
- other consumables over life
- HVT or HVT contacts leak
- clogged filters
There were some bulletins here in other topics, maybe copyman posted them, as I don't have them handy.

We've been facing this on multiple machines for years always cyan dev that gets depleted.

All drums, transfer belt & filters new, remaining devs well in life replaced cyan dev unit after a few thousand dev is depleted again.

Seen it on the C452/C552 & all the 4 series machines not yet on the 8 series so there is hope!

[tsbservice]

Re: C454e cyan developer

We've been facing this on multiple machines for years always cyan dev that gets depleted.

All drums, transfer belt & filters new, remaining devs well in life replaced cyan dev unit after a few thousand dev is depleted again.

Seen it on the C452/C552 & all the 4 series machines not yet on the 8 series so there is hope!

What about HVT lines on these. Did you check contacts for evidence of arcing? That can be tricky fo trace.

[copier tech]

Re: C454e cyan developer

What about HVT lines on these. Did you check contacts for evidence of arcing? That can be tricky fo trace.

Nothing obvious print quality is perfect if the hvt was failing I'd expect to see a quality issue.

[3ktlc]

Re: C454e cyan developer

We have had issues with the cyan developer units also. Just had 3 go bad last week. All less than 10k on them

[copyman]

Re: C454e cyan developer

Search this forum for "4" series developer. I posted a konica minolta bulletin addressing Cyan & Magenta developer units crashing because of overlife consumables. Usually it's the same color drum but "ANY" other drum can cause a developer unit to crash. And even an overlife transfer belt or HV shorting out can cause developer failure but less common. It's usually the drum being way overlife. It's something we have to live with if we are going to turn off the end of life messages! Still think you are way head of the game even if you have to buy a new dev unit.

[vedder]

Re: C454e cyan developer

I am currently facing this problem, machine going through cyan dev units, customer has always replaced consumables when required, all tcr readings are correct, the last time i went I replaced dev unit, hv board, all contacts to all dev units, anything I could think of, problem returned within weeks. We have a fair few Konica`s out there and only come across this twice, both machines were very high milage machines, nearly 2 million clicks, heavy coverage and heavy stock, thats the only link I can find between them. Its obviously a known cyan issue because if you buy a unit online, the cyan dev is a lot more expensive than any of the other colours.

I have spoken to Konica regarding this and the response was "try a hv board, that might work"

[copyman]

Re: C454e cyan developer

I am currently facing this problem, machine going through cyan dev units, customer has always replaced consumables when required, all tcr readings are correct, the last time i went I replaced dev unit, hv board, all contacts to all dev units, anything I could think of, problem returned within weeks. We have a fair few Konica`s out there and only come across this twice, both machines were very high milage machines, nearly 2 million clicks, heavy coverage and heavy stock, thats the only link I can find between them. Its obviously a known cyan issue because if you buy a unit online, the cyan dev is a lot more expensive than any of the other colours.

I have spoken to Konica regarding this and the response was "try a hv board, that might work"

First advice is never ask Kon/Min for tech support. They will always tell you it's a bad board when 99% of the time it's not! When you call them they pull up the same knowledge base that you can do if you are a dealer. Only difference is they start at the bottom of the troubleshooting chart blaming a bad board.

Anyway about your problem, using "genuine" toner? New transfer belt? Since high milage machines it could be many things but you have covered most of them. Sounds like you are a Kon/Min dealer if you were able to call/access the knowledge base, if so search for C454 dev units. There are several bulletins addressing this.
Would also look closely at and replace the HV wiring, one of the bulletins addresses this.