Toshiba 2555 CSE - Toner shows that it is empty although it's not

[Iroc]

Hello,

I have a problem with a Toshiba 2555 CSE (40 k black, 20 k cmyk - almost new ;-)).

Suddenly the machine notified to replace the black toner (k), because it should be empty. There is shown 0 % remaining capacity.

I`ve inserted a brand new toner, but nothing changed.

Then I've checked the "empty" toner in another machine, it has more than 80 %.

So the problem is that the machine shows that the toner is empty although it's not.

I've inserted a "new" used black developer from another machine, but the problem is still the same.

If you insert the developer and toner and close the front clap, then you hear that the toner feed is working, but after several seconds you get the same status that the toner is empty and has to be replaced.

I have a second machine of this type, so there are enough spare parts.

Does anyone has an idea to solve this problem?

[blackcat4866]

Re: Toshiba 2555 CSE - Toner shows that it is empty although it's not

It's fairly common on the Weisshorn series: The front door can warp outward toward the center, allowing the toner cartridge to shift to the front, losing connection to the toner cartridge EEPROM. One approach is to swap out the front door. Another approach is to add a piece of foam onto the inside of the door to press the toner cartridge back into the machine (the thickness of this foam is crucial for it to press the cartridge in, but not pop the door open). I think you'll find that all four cartridges need this foam. If the LED cleaning wand is not fitted into the door correctly it can cause this issue.

Is the vertical toner tube open and clear? Does the shutter open when the waste bottle is installed? I seem to recall a situation with a poorly formed aftermarket waste bottle that was not opening the shutter at the top of the toner tube, to let the toner flow through. This might sound silly, but one of my customers did not re-install the waste bottle after installing toner, so toner was never added. This customer also felt the need to break a needle electrode and cleaner, when the machine did not become operable. Removal of the waste bottle is not required to install toner, nor is breaking charger parts ... I just add this to my list of things that my customers do that I will probably never understand.

If you swapped in a different developing unit, you have probably ruled out a developer bearing or toner sensor issue ... but that's still possible since it's a very common issue, and it's very possible that you have two developing units with the same fault.
=^..^=

[tnrtt]

Re: Toshiba 2555 CSE - Toner shows that it is empty although it's not

Hello,

I have a problem with a Toshiba 2555 CSE (40 k black, 20 k cmyk - almost new ;-)).

Suddenly the machine notified to replace the black toner (k), because it should be empty. There is shown 0 % remaining capacity.

I`ve inserted a brand new toner, but nothing changed.

Then I've checked the "empty" toner in another machine, it has more than 80 %.

So the problem is that the machine shows that the toner is empty although it's not.

I've inserted a "new" used black developer from another machine, but the problem is still the same.

If you insert the developer and toner and close the front clap, then you hear that the toner feed is working, but after several seconds you get the same status that the toner is empty and has to be replaced.

I have a second machine of this type, so there are enough spare parts.

Does anyone has an idea to solve this problem?

Is this OEM toner you're using? I'd check the initial reference value 05-2405 for K. Shouldn't be higher than 140 for that model. Try dropping the value.

[Iroc]

Re: Toshiba 2555 CSE - Toner shows that it is empty although it's not

Thank you both for your input.

Although the front door of this machine looks great and doesn't warp out like I know this from other machines, I put a little piece of card in front of the black toner to increase the pressure on it.

Moreover I changed the waste bottle and started the machine. First, there was an error, that the black toner is not recognized, but after a few seconds all seemed fine.

The remaining capacity of the black toner was now at 78 %. Great, but unfortunately only for a minute.

The machine asked for cleaning the led (CE40).

Due to the fact that the toner feed was still working all the time, there was and is a lot of toner on the developer unit and the led. I cleaned the developer and wiped the led with the green wand, which now is black.

After restart the machine, the problem is still the same (CE40).

I wiped the led several times with the green wand, but with no effort.

Also on copytechnet there was written to try 08-4546 and change the value from 4 to 0, but the problem (CE40) is still the same.

Referring to the advice of tnrtt the values (05-2405) are the following:
Y: 141
M: 135
C: 135
K: 141

The machine was used always with OEM toner.

Do you have an idea how to clean the led instead using the green wand and how to reset CE40?

[blackcat4866]

Re: Toshiba 2555 CSE - Toner shows that it is empty although it's not

It is not a simple task to remove the LED exposure assembly. The green wand is your best bet.

It's possible that your black developer is so overtoned that it is dumping developer directly onto LED array continuously. If the bearings are not leaking, I'd clean the toner sensor and change the black developer. =^..^=

[Rusty.Harris]

Re: Toshiba 2555 CSE - Toner shows that it is empty although it's not

Little trick I do, is squirt a light amount of "glass cleaner" (or whatever you use), on the pad for the LED cleaner. Sometimes if the pad is dry and the humidity is low, it might just smear it around instead of cleaning it off.

As BC said, if you have to remove the LED assembly, GOOD LUCK! It is a MAJOR pain to remove & reassemble, especially if you don't have the jigs for the wire harnesses.

Thank you both for your input.

Although the front door of this machine looks great and doesn't warp out like I know this from other machines, I put a little piece of card in front of the black toner to increase the pressure on it.

Moreover I changed the waste bottle and started the machine. First, there was an error, that the black toner is not recognized, but after a few seconds all seemed fine.

The remaining capacity of the black toner was now at 78 %. Great, but unfortunately only for a minute.

The machine asked for cleaning the led (CE40).

Due to the fact that the toner feed was still working all the time, there was and is a lot of toner on the developer unit and the led. I cleaned the developer and wiped the led with the green wand, which now is black.

After restart the machine, the problem is still the same (CE40).

I wiped the led several times with the green wand, but with no effort.

Also on copytechnet there was written to try 08-4546 and change the value from 4 to 0, but the problem (CE40) is still the same.

Referring to the advice of tnrtt the values (05-2405) are the following:
Y: 141
M: 135
C: 135
K: 141

The machine was used always with OEM toner.

Do you have an idea how to clean the led instead using the green wand and how to reset CE40?

[Iroc]

Re: Toshiba 2555 CSE - Toner shows that it is empty although it's not

I succeed in small steps.

Now the machine is running without error, I inserted another black developer unit.

Btw. now it's possible to use both developer units without any error.

But I have still a problem with the dirt (toner) in the machine and therefore the print quality is very poor. In some areas the print is blurred, in other areas there is a grey background (see at the testprint below).

I attached some picutres. Due to the amount of toner there in my opinion it is impossible to clean the machine with the green wand. It seems like you have to dig over a sandbox with a small tea spoon.

Is it possible to clean this area with a vacuum without break down the whole machine?

[blackcat4866]

Re: Toshiba 2555 CSE - Toner shows that it is empty although it's not

It is not a simple task to remove the LED exposure assembly. The green wand is your best bet.

It's possible that your black developer is so overtoned that it is dumping developer directly onto LED array continuously. If the bearings are not leaking, I'd clean the toner sensor and change the black developer. =^..^=

I think that you are misunderstanding me.

When I say: "Replace the developer." I do NOT mean replace the developer unit. I mean: "Get out your vacuum. Vacuum out all the black stuff inside the black developing unit (called: developer). Buy a bag of new developer powder. Pour in the new developer powder. Clear the appropriate developer counters. Perform a developer stir. Now clean the LED array. Perform the color calibration."

The LED array will continue to cover with toner until you install new developer powder. =^..^=

[Blizzoo]

Re: Toshiba 2555 CSE - Toner shows that it is empty although it's not

By the looks of the pictures you need some nice maintenance to get this machine's printing quality.

You need a service vacuum - most important tool. Take out all of your drum units, developer units, transfer belt clearner unit (remove this 1st and then the transfer belt) and transfer belt. You will have more space - I was able to vacuum with the long nozzle tip from a 3M vacuum and after I used the cleaning wand wrapped with some clean cloth to reach the sides of the LED print heads for remaining toner. Don't vacuum the top of the LED's, only on it's sides.

All of your drum charges needs taken out and cleaned properly. Clean that wand and re-use it after you put back all of your units ready for the calibration to correct the colors.

You only need to take the LED unit out if you need to change one of the LED's or something else, it's not an easy job just for cleaning some toner.