Well, I am trying figure out a situation with images and a circuit diagram.
I am checking all part looks normal, but if I insert this board on a machine the resistor is exploding and one leg of resistor is breaking off.
Actually I don’t understand why a resistor and capacitor was inserted parallel to the input of the AC power supply. Additionally, the resistor is exploding, but the fuse is solid yet.
New schematic as a JPEG image:
For the circuit, I didn't find a varistor symbol, so I use an adjustable resistance symbol in circuit instead
Resistance: 470 kilohm