Jack sewing machine error Eb repair ( without disabling the voltage protection )

Jack F4 sewing machine control panel display shows Eb and stop running. In this video we show how to find the problem in pcb and how to repair this. This error occurs due to over voltage detection. You can solve this by changing the settings and disabling the protection. Cut off the power, and check whether the supply voltage has exceeded 264V, if yes, please adjust the voltage to the rated voltage, then start to work(rated voltage: 220V) or change the parameter”Y” to 0. If you don&want to disable the voltage protection then watch this video and do the same, it will solve the problem.