How to Fix Brother Sewing Machine Error Code F5

Q:  What does F5 error message mean?
Ans: Dirty speed sensor
Q:  How to fix F5 error message?
Ans: Unplug the sewing machine and check the timing shutter wiring connection on the main PCB assembly. If the wiring connection is okay, clean the timing shutter. Replace the timing shutter if it doesn't work after you clean it. If the problem persists, replace the main PCB assembly.
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