11
SERVICE
HORIZONTAL CONTROL REPLACEMENT
The game’s controller has two axis, horizontal and tilt. If the game has no movement horizontally
when the controller is pushed to either side, you will need to check the horizontal pot located at the
back of the game. If the game has no tilt control when you move the controller handle left and right,
you will need to check the tilt pot located at the front of the controller handle. See next page for in-
structions.
To access the horizontal pot, remove the lower back panel shown below. Check for the presence of
+5 VDC on the outsides of the pot (One pin will have +5VDC and the other Ground). The inside pin
should vary in voltage when the controller is pushed left and right. If no voltage is found on the out-
side pins, check the wiring and I/O board for failure. If voltage is present on the outside pins but no
voltage is present at the center pin, replace the pot. If you have sporadic movement, perform a cali-
bration from the setup menu before replacing the pot. If you do replace the pot you will also need to
perform a calibration from the menu before resuming use of your game. Be sure when replacing the
horizontal pot that the pot’s movement is centered so that full travel can be achieved both left and
right. In other words, center the pot, center the controller, then engage the teeth of the gears.
Failure to do so will damage the replacement pot.