Sullivan, WI
Quoted from WeirPinball:Have a strange problem on this NBA Fastbreak - defender motor locks on as soon as pin is turned on and fails defender motor test. pulled the motor driver board, no locked on transistors and changed the logic chip with no change. unplugged the motor and manually move arm through all the optos which check out good. Only two direct signals come from the driver to the motor drive, on/off and direction. Wanted to check to see if anyone had an idea before I start shotgunning the chips in the direct line path. Also changed out mpu with no change.
What do your defender optos show in test?
