Welcome to the X-Rite Model 390/391 troubleshooter. We hope this tool will help you resolve any issues that you might be experiencing. Follow the diagnostic tree to troubleshoot the problem that you are experiencing with your X-Rite 390 or 391 densitometer. When you are done, we ask that you return here and take a moment to let us know how this tool worked. Your input will help us craft better tools in the future

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