Dip settings:    All four dip switches on the bottom of the hopper should be set to “on”.   This selects ICT protocol using the RS-232 interface.

The turret wheel can be removed to look for jams.   Remove the hopper by pressing down on the tab at the back of the unit and slide the plastic hopper forward, and lift off.    The turret wheel lifts out.   There is tapered pin through the motor shaft that is free floating and is only held in place when the turret is on.   It will fall out and get lost if you are not careful.    To replace, just slide the pin into the motor shaft, center it, and drop the turret back over the shaft.  It has a slight taper so it only goes in one way.

Also for jammed conditions, there is what looks like a screw adjustment recessed at the rear of the unit.   This is an extension of the motor shaft, and if a coin is jammed you can rotate this shaft clockwise with a blade screwdriver until the coin is ejected.

As a double check, the turret should be part number A25140 for US and Canadian coins.   There is an additional coin size setting that is accessible through a cover plate at the front of the dispenser…two tabs hold it down.    You will see a metal serrated lever that is held in place by bumps in the plastic housing.    The US adjustment is correct when the lever has been moved three bump positions smaller than the widest setting.   Lift the metal lever up and move it to the new position if necessary…it does not slide from position to position.