I have a 9301 that has been almost trouble free for two years. Now every two weeks or so it comes up saying sensor cleaning needed. I run the CTD sensor adjustment after cleaning the sensor windows and the message goes away. The first time someone else did it and the second time it seemed like a little toner was over the widows so I put in a transfer belt cleaning unit. The last time the windows looked spotless. Anyone had any experience with this? It is only a five minute service call but it did not do this for years. I always keep the software up to date on all my Samsungs. I only have this one model so am only asking if someone else has had this issue.
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