when you push the button to start the record you will hear a motor coming on if you let the button go to quickly the motor will just stop. that's because there is a cam mechanism and the cam motor has to run long enough for contact to make up so the record will start to play. the unit use a rotating drum mechanism to operate. ok
if when you push the red start but on your switch, on the drum mechanism it will stop this is normal! one of the relays in the mechanism has a normally open swatch and that will be open until the drum mechanism runs long enough for the contact to change state! once that happens the drum mechanism will complete its cycle after 360 degree circle and then stop again until you push start button again!
Alan