브레빌 870 펌프, 전원코드 교체하는 방법, 압력이 쭉쭉~ 올라가요, How to replace the Breville 870 pump

I've been using Breville 870 for almost two years for my Australian fastballs. In Korea, electricity is 220v 60Hz, and in Australia it is 50Hz. So the operating pressure of the coffee machine was a little low due to the frequency difference of the pump. So I bought a 60Hz pump and replaced it. It's my first time, but it takes about an hour.