How to change a drum color on a Riso MZ 770E? (I'm new to this)

[adonnelly3]

Hi There! My name is Adam and I've recently bought a Riso MZ 770E. I have a bright red drum and I'm trying to change it to Yellow. How would I go about this? I understand I'll have to go through reams and reams paper until it goes from red to yellow (Via orange). However I don't know how to change the drum settings to accept the yellow ink? Any help would be greatly appreciated!

Many Thanks,

Adam

[jermyth]

Enter test mode and run 890 with the new color inserted in the drum.
Good luck.

[adonnelly3]

Thanks SO much, worked great. Did have to print reel off around 1000 sheets (Both sides) but its now yellow.