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

[Nico.FRA]

After the machine gives me the error message "change the toner", a new original toner installed, the toner level indicator always goes low. the PC interface gives 4% while the toner is new. test with another new toner, always the same. In addition, the black print is very pale but it has been working like this for 1 month! By changing the development unit k, the level indicator remains identical, very low, but the copy is instantly perfect again ..... but 500 copies later, again, very pale black copy. Anyone have any idea of ​​the problem? Error Code P-9!

The other actions which have not changed anything .... changing the motherboard, checking the clutch k that works.....inverted k and yellow toner (with change of the chip) it doesn't change anything .....
inverted k and yellow toner (with change of the chip) it doesn't change anything ....inverted k and yellow toner (with change of the chip) it doesn't change anything ....

[allan]

Have stripped and cleaned the hopper?

[Nico.FRA]

Have stripped and cleaned the hopper?

"It's done, but I'm afraid it could come from the HV unit card"

It's done, but I'm afraid it could come from the HV unit cardIt's done, but I'm afraid it could come from the HV unit card

[GIUBOSS]

have you carried out all the checks for the P-9 fault (Black) including the transfer unit? Have you replaced the developer k unit as per PM?

[copyman]

Might of missed it read your post real fast. Did you check to see if K developer dumped? Did you try a new K dev unit?

Genuine toner?

[allan]

If its a HV issue then the TCR value should stay steady even with low print density.
The fact that you installed a new dev tank and 500 prints later the prints was light would posibly be a toner supply issue.
No C2557 error? What is the TCR value?


Honestly i almost never replace HV units ever. Last one was on a B363 and before than none for years.
On that machine the contact and spring making contact can get some corrosion but easy to clean.

[blackcat4866]

Have stripped and cleaned the hopper?

Usually it's the bushings of the toner hopper seizing up. There are new style bushings that are supposed to fix this ... but in my experience most of the time if you clean the hopper bushings thoroughly, it never comes back. =^..^=

[Nico.FRA]

Usually it's the bushings of the toner hopper seizing up. There are new style bushings that are supposed to fix this ... but in my experience most of the time if you clean the hopper bushings thoroughly, it never comes back. =^..^=

"by dismantling the Assy sub hopper, am i right?"

[Nico.FRA]

If its a HV issue then the TCR value should stay steady even with low print density.
The fact that you installed a new dev tank and 500 prints later the prints was light would posibly be a toner supply issue.
No C2557 error? What is the TCR value?


Honestly i almost never replace HV units ever. Last one was on a B363 and before than none for years.
On that machine the contact and spring making contact can get some corrosion but easy to clean.

"OK"

[allan]

Yes.

Did you replace the dev tank with a new or used devtank?

What is the black TCR value????