Step1: Turn off power to the oven at the circuit breaker.
Step2: Remove the access panel to locate the existing speed control board.
Step3: Disconnect all wiring and mounting screws from the old board.
Step4: Install the new control board in the same position and secure it.
Step5: Reconnect all wires according to labels or the wiring diagram.
Step6: Replace the access panel and restore power.
Step7: Test the oven for proper speed control and follow safety precautions when handling electrical components.