I have a strange problem with my KSM150PS which have the same phase board.
Speed 1 to 4 have the same speed. When start on "stir" motor start about 100rpm and goes in 10 sec. to about 120rpm. Governor and Control plate work as well. The Governor want to break the circuit and press on control plate. I think it must be the phase board.
On my first test i have disconnect the blue and red/white wires from control plate. So the motor must start on slowest speed but it goes to 100rpm.
The next try was change triac and diac on phase board. Same result.
Then i change the caps on phase board. Same result.
Then i change all resistors on phase board. Same result.
The measured motor power was 40.6V
The resistor R5 on my phase board has 62k 1%. Can someone confirm that?
Do you repair mixer? I have the same problem
Dont know about wattage of resistors, can anybody help with it? Ksm150 325watts mixer