Here are the test instructions:
T.16 Loop/Gate Test This test is used to verify proper ball delivery from the shooter lane onto
the playfield, and to exercise the four (4) loop switches and the two (2) control gates.
To verify proper ball delivery from the shooter lane onto the playfield after entering this test:
1a) Verify that the coin door is closed.
2a) Press the start button to clear any error messages.
3a) Place a ball into the shooter lane, or press the launch button to eject a ball from the
trough to the shooter lane.
4a) With a ball in the shooter lane, press the launch button to launch the ball onto the
playfield. The left control gate should open when the ball is launched from the
shooter lane. The ball should travel along the shooter lane, around the outer loop
(from right to left), and be delivered cleanly to the left flipper at a reasonable speed.
To repeat the test, repeat steps 2a-4a.
To exercise the four (4) loop switches and the two (2) control gates after entering this test:
1b) Verify that the coin door is closed.
2b) Press the start button to clear any error messages.
3b) Roll a ball around either the left or the right loop. A sound is made as the ball passes
over the loop switches, and the state of the loop switches are updated in the display.
If the ball is traveling around the loop from left to right, the right control gate should
open upon activation of the second left loop switch (L.HI). If the ball is traveling
around the loop from right to left, the left control gate should open upon activation of
the second right loop switch (R.HI). When the ball has finished its path around the
loop (either from left to right, or from right to left), the test should report "TEST
PASSED" on the display. Any other result indicates a problem with either the loop
switches, or the control gates, or both.
To repeat the test, repeat steps 2b-3b.
During this test, the diagnostic test buttons on the coin door act as follows:
Escape: This button returns to the previous menu.