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Date Created 10-02-2021 Russ Jensen Inside Your Bingo THE
CONTROL UNIT The
heart of all bingo mechanisms is the control unit. This is a large motorized unit containing many groups of
cam-operated switches and a large contact disk with rotating wipers at one
end. This unit provides all basic timing functions to the game circuitry, as
well as implementing the search for winning combinations. The unit is mounted
horizontally on a shelf inside the backbox. A pictorial view of a typical
unit is shown in the accompanying illustration. The
unit contains a motor, which continually operates, turning a shaft that
extends the length of the unit. Attached to this shaft are many cams which
operate sets of switches These cams are divided into groups, each of which
(except for cam number 1) are clutch driven. The clutches are released, and
thus the set of cams allowed to rotate, by the operation of solenoid coils
called cam index coils. Cam
number one rotates all the time and provides basic timing pulses to the
game's circuitry. Cams number 2 through number 9 are referred to as timer
cams and rotate for one revolution each time a coin is de- posited
or replay played off. The switches operated by these cams provide timing and
control pulses, and signals required during feature selection and extra ball
feature attempts. These cams, and their associated switches, are set into
motion each time the timer cam's index coil, mounted directly beneath them,
is energized. They then make one revolution and stop. Cams
number 10 through number 14 are called the replay cams and operate only
during payout (awarding of replays). The switches operated by these cams
provide all timing for the payout operation and are set into motion by the
energizing of the replay cam's index coil. That solenoid is kept energized
until the proper number of replays have been scored and thus these cams
continue to operate during replay scoring. The adjustment of the switches
associated with cam number 13 are critical to proper scoring of replays. At
one end of the control unit is a large disk studded with many circular rows
of brass contacts. A set of switch wipers attached to the control unit's
central shaft, is constantly rotating and making
contact with the contact points in sequence. This disk is referred to as the
search disk, and is the heart of the winner
detection circuitry. Its wipers continue to rotate until a winner is
detected, at which time they stop on that winner during payout. After payout is complete they again start rotating, searching for possible additional winners. It should be noted that although the wipers on this unit are always rotating (except during payout) the rest of the winner detection circuitry is not enabled until the fourth ball is shot. This is the reason a bingo will never pay out until the fourth ball is in play, even though an in-line winner has already been made by the first three balls. During payout the rotation of the wipers is stopped by the energizing of the search index coil mounted next to the disk.
Phil’s Night Club
Miss America Deluxe
Manual
Pinside has several good
references to the Control Unit https://pinside.com/pinball/forum/topic/bally-dixieland-bingo-not-starting 29REO
First thing is does the motor on
the control unit run? The coin switch pulls in the
start relay which in turn pulls in the game reset relay (I can’t recall if
that’s the right name but I can go to the game and
check). It is on the back door in the center just below the 3/4 & 5/6
scoring discs. I think it’s the top one. If you push the armature down by
hand it should start the control unit motor. The collect button becomes
active after the 5th ball is shot and pulls in the 5th ball relay. When the
collect button is depressed the timer resets and the control unit starts and
begins the scoring process. When you say the score indicator goes to zero
when the machine is cycled off/on then I assume the control unit motor runs.
If you reset the timer by hand and release the 1/2 scoring wiper then the
game should start the search process and if a win is found it will lock in on
it. If it locks in “take” the score & do not leave the game sit while locked
in as it will eventually fry the wiper lock coil. Looks like Nick
covers a great many Tech Notes https://foramusementonly.libsyn.com
› episode-156-ch... Bally actually made it very easy
to swap units in and out of a bingo. Today I talk about how to remove
a control unit motor from a Bally bingo. https://www.podparadise.com
› Podcast › Listen This is our continued series looking at the control
unit on a Bally bingo - specifically the 1972 ... For Amusement Only EM
and Bingo Pinball Podcast.
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