ricoh mp 2501sp clear print

[Mediaservice srl]

clear print by disconnecting the bias connector perfect copy, tested ht board working, tested development group working

[davel]

Please elaborate

[Mediaservice srl]

1) clear print
2) I unplug the cable
3) perfect print
4)installed new card same problem

[davel]

Wild guess, replace the PCU. What are the PM counts.

[Mediaservice srl]

Tested pcu (photoconductor unit) on another copier pcu works

[luca72]

1) clear print
2) I unplug the cable
3) perfect print
4)installed new card same problem

mumble...mumble....ok, board ok, pcdu ok, on another machine..
maybe some contact sheet between pcdu and wiring, on the back behind the board

[luca72]

mumble...mumble....ok, board ok, pcdu ok, on another machine..
maybe some contact sheet between pcdu and wiring, on the back behind the board

I forgot.....try stopping the machine during printing, and check the image on the drum as it is, if it is ok, some spring or part from the transfer roller may have come off.

[slimslob]

1) clear print
2) I unplug the cable
3) perfect print
4)installed new card same problem

How about a full page scan of the problem? You have a full page scanner right in front of you, why the hell did you have to take useless cell phone pictures?

[Mediaservice srl]

the image of the drum is faded

[luca72]

the image of the drum is faded

if the laserbox its cleaned.....then investigate pcdu>mc contact and hvt wiring

[Luism]

Hello, I will try to change the End block polarization and cylinder load sops

[Luism]

You must have a current leak in the terminals of the machine

[slimslob]

the image of the drum is faded

Common cause is a dirty laser shield glass.

[Mediaservice srl]

Common cause is a dirty laser shield glass.

no

[KeviM]

It would seem like you have a high voltage charge leak occurring between the high voltage board and the PCU or the transfer and separation unit.

If you have changed and tested the PCU and the high voltage board then I would recommend getting some sort of rubberizing paint or plastic paint and neatly painting the plastic blocks that the metal charge wires travel through. Also try changing the transfer and separation unit.

Good luck friend