Bad quality of print on Canon iR-ADV 6065

[Ingranaggio_rotto]

Hello! I have another particular problem to illustrate !
I have a Canon iR-6065 ADV with the problem by dark background ...
I replaced the primary unit charge, Developing Unit, Potential PCB, transfer belt ...
I clean the drum with Cerium oxide ....
Nothing, the fault persists!

Only if I hold off control of the potential, the problem does not occur, but the copy or print quality is very bad!

Tips?
Thank you!

[charm5496]

Re: Bad quality of print on Canon iR-ADV 6065

check your contacts for the HVT on your developer assembly. They get pushed down and make a poor connection.

[Ingranaggio_rotto]

Re: Bad quality of print on Canon iR-ADV 6065

Ok ... Controller and I'll let you know!

[Ingranaggio_rotto]

Re: Bad quality of print on Canon iR-ADV 6065

Hi! I checked the contacts, cleaned with isopropyl alcohol ....
But nothing has changed!

[teckat]

Re: Bad quality of print on Canon iR-ADV 6065

Hi! I checked the contacts, cleaned with isopropyl alcohol ....
But nothing has changed!

internal HVT bias contact plate

background is usually / BIAS or TONER issue / or Drum surface

there is a 'Remove Background Density' button on the machine under the density button. The Density button is on the Copy home screen The background can be removed with two settings of Auto or Manual.