Recently bought a defect X1 I am trying to fix.Until now I have opened the alu-boiler and cleaned it inside, changed the boiler gasket to stop it leaking and also changed the gasket in the brew head valve to stop the dripping. Only remaining problem is that the temp. gets too high (130 °C) when the machine is turned on, and when temp is reached and the light goes out, nothing happens if the steam switch is turned on. I guess there are two possibilities, 1) the electronic thermostat is defect or 2) the wires for the PCB have been swapped around by the former owner.Can anyone help me with a diagram for the PCB?
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