Dutch Pinball
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Technical Support TBL FAQ
rev 0.51
Page 21 bowling operations faq rel 0.86
Possible cause of zero pins dropping?
As explained the opto doesn’t decide which pins have to drop, it just times the coils to pull up the
pins which need to fall. So,
if the opto doesn’t trigger this means the pins will not be pulled up
and
the software will not show on the display pins are hit and fallen. If this happens check wiring of opto
and if opto is properly aligned in front of the hole.
Also, you will see on the right opto (which is the Transmitter) a shrinking sleeve is mounted. The
purpose of this sleeve is to narrow the beam which goes across and hits the receiver. If the beam is
to wide,
the ball will not fully block it and the pins will not drop. If this test doesn’t show the OPTO in
screen, go into Switch test and if your hand does cause the opto switch to trigger this shrining sleeve
is likely not narrow enough
There is one mechanical switch to test and that is at the ball launcher
