Stern Pinball AC/DC Service And Operation Manual page 33

GAME SPECIFIC TESTS
To initiate, from the diagnostics menu select the "GAME" icon. Ensure the power interlock switch is pulled out when testing with
the coin door open. The menu is provided to allow the technician a simple method of testing game specific coils and/or switches,
if required.
BALL TROUGH TEST
To initiate, from the diagnostics menu select the "CLR" icon. Ensure the power interlock switch is pulled out if testing
with the coin door open. The menu is provided to allow the technician a simple method of removing the balls from the
trough and also to test functionality of the trough, ensuring proper trough operation. Upon entering Ball Trough Test,
you will notice that four switches are already indicated as closed. In the example, the 4-ball trough switches #18, #19, #20, & #21
are shown closed (pinballs at rest in the ball trough). To return to the diagnostics menu, press the green [BACK] button.
Press the black [SELECT] button to eject the ball in the first position Switch
#21 (VUK OPTO Trough #1 (R)). Simultaneously, the dot matrix display and
the playfield will eject the ball to the trough up-kicker, eject from the trough
up-kicker into the shooter lane momentarily closing switch #23 (shooter
lane), and is ejected onto the playfield where the technician can easily
retrieve the pinball or allow the ball(s) to to re-enter the trough to continue
Ball Trough Test. The dot matrix display indicates switch #18 (4-ball trough #4 (L)) as open as the remaining three (3) pinballs shift
over one (1) position to the right. If the technician allows the rejected pinball to re-enter the ball trough, the dot martix display
will indicate switch #18 as closed. Reminder: Switch #22 is the stacking OPTO switch ; if more than five (5) pinballs are used the
additional switches will be noted. In this game four (4) pinballs are used and required for proper operation.
CAUTION! Continuous use of the above test may overheat the trough up-kicker coil.
AC/DC LUCI MANUAL 500-55C8-01
SERVICE MENU SYSTEM
33