Originally Posted by
Iowatech
This might be a long shot, but have you tried resetting the machine using the "Reset" key (holding it down for ten - fifteen seconds while turning the machine on)?
I have seen where a voltage fluctuation caused the thermal head's output to become even worse than your pictures show (although that was on an older Riso line). The reset cured that problem.
Also, are you using master material from Riso? Sorry, I've seen buildup on the thermal head from non-OEM masters cause something similar to this. That would explain why cleaning the thermal head only helped temporarily.
Actually, you might want to try a different master roll out of an unopened box even if you are using OEM masters.
Sorry if this is a waste of time.
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