I've just stripped a microwave of parts as it moves towards the recycler. It had a bad PCB and wasn't worth fixing.
The vent fan is identical to the one here. It's marked 120V and has three wires, blue, orange and yellow. The blue wire is slightly larger gauge than the other two. The prongs on the motor terminal connect to blue, orange, yellow, in that order.
I'm fairly certain the fan acts as a transformer and provides 21V AC for the turntable motor, with the other two being mains AC. But which is which?
The vent fan is identical to the one here. It's marked 120V and has three wires, blue, orange and yellow. The blue wire is slightly larger gauge than the other two. The prongs on the motor terminal connect to blue, orange, yellow, in that order.
I'm fairly certain the fan acts as a transformer and provides 21V AC for the turntable motor, with the other two being mains AC. But which is which?