How do I replace the thread tension unit on my Janome 639?
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First off I would download the PDF manual for your sewing machine. You can download the PDF file here:
janome.com/
If this doesn't help I would suggest contacting Janome Service and Parts online. A rep is there to help you. They could send you a video or a diagram to teach you how to change this unit. I cant find a lot of information about this machine online. There isn't any video out there to help you. Please contact the dealer at:
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