Ricoh MPC2503 Yellow Background on copies and prints.

**Vioksrall** · 07-09-2015

Guys I need your advice. Our customer has MPC2503 machine that constantly having yellow background on prints and copies. Although we repeatedly replaced PCDU-Yellow but still keeps coming back. But if print the calibration sheet, it's ok. I have tested the Transfer Unit but also ok. Does anyone has experience like this? Thanks in advance.

**ruben** · 07-10-2015

Did you reset the PCDU counter for yellow? If you don't, the voltages will be off and can cause coloured backgrounds. (This model does not auto detect a new PCDU)

**Vioksrall** · 07-10-2015

Originally Posted by ruben

Did you reset the PCDU counter for yellow? If you don't, the voltages will be off and can cause coloured backgrounds. (This model does not auto detect a new PCDU)

Thank you for your reply. We always reset the PCDU counter everytime we replace them. All the firmwares are updated..

**petermuylle** · 07-13-2015

Is it an even background, or an assortment of dots with a pattern to it?
(in case of the pattern, this is normal)

**Vioksrall** · 07-13-2015

Originally Posted by petermuylle

Is it an even background, or an assortment of dots with a pattern to it?
(in case of the pattern, this is normal)

Yes sir, it is an even background covering the whole page. It's like you're printing using a yellow colored paper.

**rsyarcia** · 07-13-2015

long ago I encountered this with mpc3500 but only on copying. there is a setting on copying mode that you can set the background to lighter. you can use it to isolate your problem.

**slimslob** · 07-14-2015

Have you checked the machine side contact for the charge roller? This sounds like the yellow drum is not being properly charged.

**Zaxxon** · 07-14-2015

Don't know this model, but on metis there is a grounding plate on the pcu's if these are missing it can cause all kinds of obstructions on the print.

**slimslob** · 07-14-2015

Originally Posted by Zaxxon

Don't know this model, but on metis there is a grounding plate on the pcu's if these are missing it can cause all kinds of obstructions on the print.

The MP C2503 is part of the Metis line. He has already replaced the entire PCDU which is the PCU and DVU as a complete unit.

**petermuylle** · 07-14-2015

ground plate metis pcdu.jpg
Did you happen to build over the part in red (that is the ground plate) if you replaced pcu and developerbox as 2 units; you need to salvage this part from the old pcu.
I dont know if it is included in the complete unit.