had an account with micro scratches on the K drum,,Less than 5K prints. had to replace drum, could not find a reason for the scratches. Went back out 1 week later, same micro scratches on new K drum and now the same on CMY drums. After some research we found that the internal temp sensor was malfunctioning, showing 0 degrees. machine was over compensating for what it thought was a freezing environment. Hope I can save someone a good chunk of wasted $$$. E
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