Can you tell me how to change the color information in a Riso RZ990U color ink drum. I would like to change my orange drum to run red ink. I know that I can run red ink through it and eventually it will print in red. However, the RF chip information on the tube tells the drum that it's the wrong color ink. How do I change the drum so it now knows to accept red tubes on ink instead of orange? I have the technical service manual, but I can't find that information in it. Any help would be wonderful. Thanks!
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