Quality Problems Ricoh MPC 4502

**loading** · 03-01-2017

Hello, i have problem with Ricoh MPC 4502 quality problems when i print full dot pattern i see small dots in all surface of paper is plain paper. Also same problems is in light photos more visable are in Dark Quality Images. This problem highest in magenta, black and lighter in cyan. yellow i cant define because is hard visible seems to be good. These white spots are in all surface. this problems i also have in MPC 3001 same problem. very strange MFP has around 106K B&W and 57K Color.

**tufbnme** · 03-02-2017

Are they using OEM or aftermarket toner. Have you changed the DV?

**Lagonda** · 03-02-2017

Are they using a good grade of paper? Paper dust from low grade paper will contaminate developer and cause C/Q problems like yours.

**copier tech** · 03-02-2017

Even if the machine has a fairly low count, these are very old machines now the developer can actually "die" especially if it has been stored in a cold/environment.

Customers air conditioning can also give this white dots effect.

**loading** · 03-02-2017

Originally Posted by tufbnme

Are they using OEM or aftermarket toner. Have you changed the DV?

Hello, we use OEM toners from RICOH we do not use aftermarket toners. for now we didn't change developers.

**loading** · 03-02-2017

Originally Posted by Lagonda

Are they using a good grade of paper? Paper dust from low grade paper will contaminate developer and cause C/Q problems like yours.

I will check also the paper. i will buy branded paper and testing it thanks.

**loading** · 03-07-2017

Hello, i want to inform you yesturday i have replaced complete developer unit in Magenta after procedures i have tested with copyes same result very intersting i have checked in ricoh portal account i cant find anything for this situation. Another day i will try paper. Any Idea that would help thanks...

**Iowatech** · 03-08-2017

First the caveat: I haven't worked on that specific model, so what follows could be the essence of nonsense. I apologize if that turns out to be the case.
However, if the magenta example you shared in the first post was printed on paper fed SEF, I would make sure that drum unit is OK. Specifically, the drum itself and the drum charge.
The pattern of light and dark bands on what appears to be the leading edge of that example seem to indicate variations in drum bias. From what I saw on the machines I worked on that could be due to the drum coating being worn or damaged. It could also be caused by variations of the drum charge or discharge.
Heh, back in the day that used to be called drum chatter. Blegh.
Well, sorry again if this was a waste of time.

**Zeldaman** · 03-08-2017

Hi there!
1. developer, 2. paper and 3. take a close look at the sleeve-roller of the fuser. They also make such problems, espacily if it´s one of the old versions.
Greetings...

**gkalman2004** · 03-08-2017

Clean the itb transfer rollers, also the laser unit (when you have dust on the glass or on the polygon motor mirror ) .
The fuser sleeve when have problems will give other type of faulty image with black lines and repetitive images.