Hello,I overhauled a black Risograph GR1700 drum assembly. Though it now looks fresh, it does not run after I inserted the drum into the machine. I see C53 when I press the "*" key. I cleared pieces of cut master from the master section. I reset the machine through the two upper right keys, but all to no avail.Could someone with success or experience in my situation be of help? I don't have access to a manual, so I'm stuck. I'll be so indebted in thanks to you for your help!
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