I have a 640 and would like to find out how to determine my usage, since it's a step down from the 730, I'm wondering if it's the same process. Would you mind sharing how you find out your usage on your 730?
For a 640: Make sure the machine is off then Press the reverse button and the needle up/down button at the same time and keep pressing while turning on the machine until the service screen come up. Select the "i" icon and then the icon that has a picture with the clock and a question mark. That will show you the hours and stitch count used. To exit the service program just turn off the machine.
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