KM C220 Faded to blank output

**bayshoreoe** · 03-02-2016

Customer has this unit and complaining of light going to blank prints. Printed a report from machine and it was blank. Made color copy to see if all were blank or only black. copy came out fine. printed report again, fine. Customer called a few hours later, blank output. swapped black and cyan drums to rule out drum. After a few(50) or so prints, got light and went blank. DV brush is good.

Any ideas? Not that familiar with KM color.

Brian

**acusso1234** · 03-02-2016

Hi. Try changing the K developing clutch.
Service manual explains how to do this.
Your black developing unit is not rotating due to that clutch that probably is slipping.

**neil greenhough** · 03-02-2016

Originally Posted by bayshoreoe

Customer has this unit and complaining of light going to blank prints. Printed a report from machine and it was blank. Made color copy to see if all were blank or only black. copy came out fine. printed report again, fine. Customer called a few hours later, blank output. swapped black and cyan drums to rule out drum. After a few(50) or so prints, got light and went blank. DV brush is good.

Any ideas? Not that familiar with KM color.

Brian

Yes accusso is right. The dev clutch is slipping. Changed one today, one of many!!

**bayshoreoe** · 03-02-2016

Would anyone happen to have the part number for the BK DV clutch?

**JR2ALTA** · 03-03-2016

Weird, I've never had to change a DV clutch

**allan** · 03-03-2016

I have had the drum clutch fail. need to change the entire drive.

**acusso1234** · 03-03-2016

A0EDM20000 CLUTCH

**bayshoreoe** · 03-03-2016

Thank you all so much for the assistance

**hotfuser** · 03-04-2016

the wire cracks at the joint of the clutch.

KM put a bulletin up after we advised them of what the issue was.

They also released the clutch as a seperate part due to the fact it didnt come as a single part only as a complete drive.