Test E: A Single Speed Control Button Is Inoperative

PINPOINT TEST E: A SINGLE SPEED CONTROL BUTTON IS INOPERATIVE

E1:

Normal Operation
Under normal operation the speed control actuator sends a signal through circuit 151 (LB/BK) to the speed control switches, which passes through the clockspring. The return signal is sent back through the clockspring to circuit 848 (DG/OG). When 2 buttons are pressed simultaneously, the speed control system enters a stand-by mode.

Possible Causes
- Speed control switch
- Speed control actuator