Bizhub c658 K toner issues

[emujo2]

Re: Bizhub c658 K toner issues

What is the current toner coverage percentage? These bottle ratings are based on 6% 1 sided..If you are running 11x17 1 click you can cut that in 1/2, and a rule of thumb for me (based on production machines, not in anyway saying this is fact) every 4-5% of coverage will drop the coverage by 1/2 again. A week is pretty fast to run through toner, especially at 5K/week. You might want to run a job and pull the black drum out..see if the edge delete lamp is working, or the discharge wire is doing it's job..Maybe the blade is just scraping off all the excess toner and it doesn't know any better. E

[JasonSBE]

Re: Bizhub c658 K toner issues

I swapped the machine out and brought it back go the shop. The waste tank was primarily full of black. Vacuumed out the hopper and put in a new developer. The drum was recently changed out. The toner is showing 2% but the cart is still about half full so its definately running itself out even when the machine is idle. Did a manual toner add and that went normal. I'm gonna leave it idle over the weekend and see if it runs through the bottle or operates as it should. If it's still running through toner I suppose the sub hopper and high voltage board will be the next things to consider.

[tsbservice]

Re: Bizhub c658 K toner issues

Machine is sucking toner into wtb. Forget about wrong toner reading this as already mentioned is secondary issue. I would put new wtb in and run a thousand test prints checking dev unit and tcr level at every 2 hundred prints. Also check if erase leds are doing their job. Let us know.

[copyman]

Re: Bizhub c658 K toner issues

I swapped the machine out and brought it back go the shop. The waste tank was primarily full of black. Vacuumed out the hopper and put in a new developer. The drum was recently changed out. The toner is showing 2% but the cart is still about half full so its definately running itself out even when the machine is idle. Did a manual toner add and that went normal. I'm gonna leave it idle over the weekend and see if it runs through the bottle or operates as it should. If it's still running through toner I suppose the sub hopper and high voltage board will be the next things to consider.

When you say you put in new developer, did you replace just the dev powder with aftermarket or new OEM dev unit? If aftermarket you have to consider that being problem. Even if you have a used "OEM" dev unit to try it will take that out of the mix. First thing I always do if a new customer is using aftermarket supplies with quality issues is I tell them I have to start fresh with new "OEM" supplies. The reason 99% of my customers use OEM toner is I don't want the guess work when they call for print quality issues.

Maybe it was asked already are you using aftermarket toner?

Really strange that state confirmation is showing correct reading and print quality good with machine blowing through toner like that. To eat that much toner that fast there would have to be a thick coating on drum at some point and cleaned off with drum blade into waste box.

Think you may be on the right track with high voltage problem if nothing else corrects it. Perhaps something like HV not turning off when suppose to, etc

Thanks for keeping us posted. Since this is such an odd issue would like to hear what caused it.

Good luck

[robinsonad86]

Re: Bizhub c658 K toner issues

Just out of interest Konica aren't supplying "half bottles" for this range are they?

[copyman]

Re: Bizhub c658 K toner issues

Just out of interest Konica aren't supplying "half bottles" for this range are they?

Thought I read something about K/M putting less toner in btls because of toner shortage? Hope they don't charge same price for it!

Original poster probably would of felt if bottle just half filled.

Still curious if using aftermarket developer & toner? Think this has to be considered as problem.

[emujo2]

Re: Bizhub c658 K toner issues

Thought I read something about K/M putting less toner in btls because of toner shortage? Hope they don't charge same price for it!

Original poster probably would of felt if bottle just half filled.

Still curious if using aftermarket developer & toner? Think this has to be considered as problem.

These 1/2 bottles are supposed to be only for customers that run very low AMV..and as most customers are contracted the price is not a factor. E

[kingarthur]

Re: Bizhub c658 K toner issues

Thought I read something about K/M putting less toner in btls because of toner shortage? Hope they don't charge same price for it!

Original poster probably would of felt if bottle just half filled.

Still curious if using aftermarket developer & toner? Think this has to be considered as problem.

Yes, they're supplying half bottles, the part number ends in an "H", and there's a blue dot on the box, but the toner situation seems to be resolving itself, as supplies now seem to be getting through

[JasonSBE]

Re: Bizhub c658 K toner issues

When you say you put in new developer, did you replace just the dev powder with aftermarket or new OEM dev unit? If aftermarket you have to consider that being problem. Even if you have a used "OEM" dev unit to try it will take that out of the mix. First thing I always do if a new customer is using aftermarket supplies with quality issues is I tell them I have to start fresh with new "OEM" supplies. The reason 99% of my customers use OEM toner is I don't want the guess work when they call for print quality issues.

Maybe it was asked already are you using aftermarket toner?

Really strange that state confirmation is showing correct reading and print quality good with machine blowing through toner like that. To eat that much toner that fast there would have to be a thick coating on drum at some point and cleaned off with drum blade into waste box.

Think you may be on the right track with high voltage problem if nothing else corrects it. Perhaps something like HV not turning off when suppose to, etc

Thanks for keeping us posted. Since this is such an odd issue would like to hear what caused it.

Good luck

I put in a new OEM developing unit. We have both OEM and after market toner. This machine has only had OEM black toner so far.

[Synaux]

Re: Bizhub c658 K toner issues

On the topic of toner, it is my understanding the the shortages are not actually do to lack of toner but lack of chips (at least that I what I have been told).

On the topic, I still think the coverage rate is still a valid question. Anything over 5% and you will not get the proper yield of only 28k (as opposed to nearly 50k on the predecessor).

What about PQ on halftone and gradation tests on 12x18"?

Power Standby settings?

[suomi]

Re: Bizhub c658 K toner issues

Konica Minolta Supplies Tatsuno Factory Resumes Production | KONICA MINOLTA

[JasonSBE]

Re: Bizhub c658 K toner issues

Quick update. I've run several hundred lattice patterns and left the machine idling for a few days. Toner level still showing 2% but the bottle still feels about half full. No excessive waste toner so far. I'm still going to run the bottle down to empty and put in a new oem cart and see if the level shows 100%. Tcr density is staying level.

[JasonSBE]

Re: Bizhub c658 K toner issues

Quick update 2. I've been running thick lattice patterns to try to run down the toner. Supply level stayed at 2% but the cart was getting lighter. After 1800 or so, the orange light finally started flashing. Replace k toner. Supply level got to 1%, and the cart felt empty. Put in fresh oem cart and Supply reset to 100%! I'm gonna test a bit more before I bring it back to site but this is promising.

[tsbservice]

Re: Bizhub c658 K toner issues

Quick update 2. I've been running thick lattice patterns to try to run down the toner. Supply level stayed at 2% but the cart was getting lighter. After 1800 or so, the orange light finally started flashing. Replace k toner. Supply level got to 1%, and the cart felt empty. Put in fresh oem cart and Supply reset to 100%! I'm gonna test a bit more before I bring it back to site but this is promising.

Just in case you didn't know - on these there are dip switches to reset toner levels.

[JasonSBE]

Re: Bizhub c658 K toner issues

Just in case you didn't know - on these there are dip switches to reset toner levels.

I did not know. Could you please elaborate?