Bizhub C220, does not recognize new black toner, pale black copy

[allan]

Re: Bizhub C220, does not recognize new black toner, pale black copy

Ok so you got the TCR level and @4% its indicates that you have low toner.
Inside the sub hopper there is a magnet that switches a reed switch on the outside of the sub hopper,
that magnet can collect developer and the aluminum plate there gets stuck.

Strip and clean the sub hopper!

PM... you are going need to figure that out.

Means more than one thing here.

[Nico.FRA]

Re: Bizhub C220, does not recognize new black toner, pale black copy

Yes, correct.

"I carried out a complete cleaning, completely emptied the hopper, reassembled and proceeded to a manual complement via the service mode. After completing the addition, I again removed the K dev Unit, turned the gears of the hopper manually, the developer circulates correctly .... nothing changed!

For information, I went to the level History 1 parameters, IDC 1 = + / - 2.97, IDC2 = + / - 2.80, where the instructions in the service manual give a rating of 4.3volts for a normal value. The rest of the information corresponds to the normal values given by the service manual"

[Nico.FRA]

Re: Bizhub C220, does not recognize new black toner, pale black copy

This is what gets me mad. How can you offer help to someone that doesn't know what a "PM" is.

Sorry I have to draw the line at some point. Not going to waste my time speaking in technical terms if someone doesn't even know something like this. Makes me think they are end user.

I will help end users to a certain point but I'm here to help my fellow tech brothers!

[copyman]

Re: Bizhub C220, does not recognize new black toner, pale black copy

First: The moderator thinks you should contribute a small donation to this site.

Second: We don't care where you are from. When I help someone I don't first look where they are from, I do look to see if they have contributed to this forum.

Like I posted I will help anyone but if someone doesn't know what a PM is that is where I draw the line. "PM" is a universal shortcut for "Preventive Maintenance". Been around since I been in this business 40+ years !!!!!

No one here is trying to scare people away, end users or technicians. This is no private club, or it would be passworded site. Just like to know who we are dealing with.

Actually hope you stay, become a contributer with a small donation, but more important a contributer with your knowledge. With the hopes you may even help me someday!

Best of luck to you.

[Nico.FRA]

Re: Bizhub C220, does not recognize new black toner, pale black copy

First: The moderator thinks you should contribute a small donation to this site.

Second: We don't care where you are from. When I help someone I don't first look where they are from, I do look to see if they have contributed to this forum.

Like I posted I will help anyone but if someone doesn't know what a PM is that is where I draw the line. "PM" is a universal shortcut for "Preventive Maintenance". Been around since I been in this business 40+ years !!!!!

No one here is trying to scare people away, end users or technicians. This is no private club, or it would be passworded site. Just like to know who we are dealing with.

Actually hope you stay, become a contributer with a small donation, but more important a contributer with your knowledge. With the hopes you may even help me someday!

Best of luck to you.

"Thank you for this friendly addition, I will do my best to honor my presence here!"

[allan]

Re: Bizhub C220, does not recognize new black toner, pale black copy

The IDS values are ok around 2.8 the two values there should not differ from each other to much.
IDS Image density sensor checks reflection on the transfer belt to determine density and also to align the different color so that the overlay of color are registered.
Don't think any of that is part of the problem you have.

If you print half-tones form service mode are the colors nice and dark and only the black that has gone light?


TCR values are normal around 6.5% Toner to Carrier Ratio. 6.5% toner in the developer.
4% here is to low.

Does it run with out giving you error codes? Looking for error C-2557.

You can relieve your problem by printing in composite black.
That means even B/W prints must be set to print in full color.
Then in the printer properties you need to go to <Quality> <Quality adjustment> and then <Other> switch the option for pure black to off.

Think that's it sure the guys here will correct me.

Need to get that info from you to help. Tweaking the setting can help but can also do damage.


So the two question i have. Are the other colors ok?
And do you get an error code from time to time?

[tsbservice]

Re: Bizhub C220, does not recognize new black toner, pale black copy

Agree with allan TCR should be 6.5 +-1.5
Add manual toner into dev unit. If it improves CQ for some prints you will know that problem is with toner not being added.
Mark K toner bottle to see if it's actually rotates. Check PCRB for blown ICPs. Get another working FREYB and swap your in case Front side relay board is defective.

[Nico.FRA]

Re: Bizhub C220, does not recognize new black toner, pale black copy

The IDS values are ok around 2.8 the two values there should not differ from each other to much.
IDS Image density sensor checks reflection on the transfer belt to determine density and also to align the different color so that the overlay of color are registered.
Don't think any of that is part of the problem you have.

If you print half-tones form service mode are the colors nice and dark and only the black that has gone light?


TCR values are normal around 6.5% Toner to Carrier Ratio. 6.5% toner in the developer.
4% here is to low.

Does it run with out giving you error codes? Looking for error C-2557.

You can relieve your problem by printing in composite black.
That means even B/W prints must be set to print in full color.
Then in the printer properties you need to go to <Quality> <Quality adjustment> and then <Other> switch the option for pure black to off.

Think that's it sure the guys here will correct me.

Need to get that info from you to help. Tweaking the setting can help but can also do damage.


So the two question i have. Are the other colors ok?
And do you get an error code from time to time?

"To answer the two questions, yes, the problem is only on black, and no, no other error message than my original P-9 which is still there! For the settings that you advise me .... i did it, not so bad as emergency solution! ;-)

[Nico.FRA]

Re: Bizhub C220, does not recognize new black toner, pale black copy

Agree with allan TCR should be 6.5 +-1.5
Add manual toner into dev unit. If it improves CQ for some prints you will know that problem is with toner not being added.
Mark K toner bottle to see if it's actually rotates. Check PCRB for blown ICPs. Get another working FREYB and swap your in case Front side relay board is defective.

"Hello, I have already manually added powder to the development unit, nothing has changed. For the rest, we will try that!"

[tsbservice]

Re: Bizhub C220, does not recognize new black toner, pale black copy

"Hello, I have already manually added powder to the development unit, nothing has changed. For the rest, we will try that!"

That's strange. At 4% K TCR your black density will be low but after manually adding toner black should improve for some time.
Did you try to swap K drum with another one?
Can you post a picture of your black printout?
Hmmm... your IDC readings should be around 4.3V indeed they seem too low at 2.9V, what is ITB condition and life count?

[Nico.FRA]

Re: Bizhub C220, does not recognize new black toner, pale black copy

That's strange. At 4% K TCR your black density will be low but after manually adding toner black should improve for some time.
Did you try to swap K drum with another one?
Can you post a picture of your black printout?
Hmmm... your IDC readings should be around 4.3V indeed they seem too low at 2.9V, what is ITB condition and life count?

"Yes, I have already swapped the drum y with the K, changing the chip, no better! TCR k level was wrong, it's now with 6.31%, in attachment the scan of the last graduating test"SKMBT_C22020031117310.pdf

[allan]

Re: Bizhub C220, does not recognize new black toner, pale black copy

Got the feeling there are tweaks applied somewhere.
Under service mode <image process adjustment>

Max image density should be 0
Image background adjust should be 0
All transfer voltage setting must be on Auto
Monochrome density should be 0
All TCR offsets should be on 0

Do manual toner add
Do gradation adjustment when you are done.

[allan]

Re: Bizhub C220, does not recognize new black toner, pale black copy

That's strange. At 4% K TCR your black density will be low but after manually adding toner black should improve for some time.
Did you try to swap K drum with another one?
Can you post a picture of your black printout?
Hmmm... your IDC readings should be around 4.3V indeed they seem too low at 2.9V, what is ITB condition and life count?

Most machines i have checked the IDS values are 2.9v for me that is normal.
But could be worth removing the transfer belt and to clean the 2 image density sensors.

Ok P-9 in this condition i think would be normal as the IDS is reporting low density.

[Nico.FRA]

Re: Bizhub C220, does not recognize new black toner, pale black copy

Most machines i have checked the IDS values are 2.9v for me that is normal.
But could be worth removing the transfer belt and to clean the 2 image density sensors.

Ok P-9 in this condition i think would be normal as the IDS is reporting low density.

"Unfortunately already done ( clean the 2 image density sensors) and nothing different.

[allan]

Re: Bizhub C220, does not recognize new black toner, pale black copy

Got the feeling there are tweaks applied somewhere.
Under service mode <image process adjustment>

Max image density should be 0
Image background adjust should be 0
All transfer voltage setting must be on Auto
Monochrome density should be 0
All TCR offsets should be on 0

Do manual toner add
Do gradation adjustment when you are done.

Found anything adjusted there?