Black dots when printing

[Bennn]

Hello,
I own a Triumph Adler 3005ci printer. Everything is good, but when i print even a blank page there's black dots on the paper.
Here's what did to fix it (but in vain poorly) :
- Clean the original holder or the glassplaten
- brush the transfer roller clean
- run [developer refresh]
- print a lot of blank copy in order to find out if the problem will solve by itself (well you know, i tried).
do you have any solutions ?

 

[Bennn]

 

[UpAndPrinting]

These units are usually maintained by a company. Do you own this one or is it leased? I would try a factory reset and changing the black toner cartridge first.

 

[Bennn]

I own this one. I didn't tried the factory reset yet. The thing is, that I forgot to mention :
- when I putting out the black toner from the printer, the issue stll the same, it still prints with black dots.

So yeah, i'll try the factory reset if necessary

 

[UpAndPrinting]

Am I reading correctly that you've tried a different black toner cartridge already? And it produced the same results?

 

[Bennn]

Yes it does do the same with another toner catridge

 

[UpAndPrinting]

Ok so it's something with the printer. I would try a factory reset or if you can, a firmware downgrade. If that's not an option, updating the firmware may fix it. But if you use aftermarket toner, it may block them.

 

[Bennn]

I've allready tried the factory reset, i'll try the firmware downgrade and keep you tune.
Also, we'll try the complete cleaning mentionned in the manual.
Cheers