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TEST/DIAGNOSTIC PROCEDURES (Continued)
"On" State Logic • Special Solenoid
"Off" State· Special Solenoid:
The Special Switch Trigger Input goes low. Mean-
while, the PIA line remains high. The remaining sig-
nals reverse their states.
"On" State Logic • Controlled Solenoid
Sol. 8+
_n_
\P;:S~
Cntr1d
Sol.
"ON"
"Off" State • Controlled Solenoid:
The Enable Input (from the PIA) goes low. Meanwhile,
the BLANKING signal remains high. The rest of the
signals reverse their states.
NOTE
As directed by the game program, the Solenoid AlC Select Relay (solenoid 12) switches
the solenoid B+ power between two power busses to permit actuating two groups of
solenoids at the proper times. In its de-energized state, the Relay connects the 'circuit A
power' to
16
"controlled" and "switched" solenoids (identified in the table with no suffix
letter or the letter A, after the solenoid number). Individual solenoid operation then
depends on the game program enabling the ground path for solenoid actuation via the
driver transistor associated with each solenoid circuit. For example, the game program
can actuate the Outhole Kicker solenoid (sol.
01
A), via the driver transistor
033.
When the game program determines that the Solenoid
A/C
Select Relay (sol. 12) must be
energized, the relay connects 'circuit C power' to eight group C solenoids
(01
C through
OSC). Now, driver transistor
033
can actuate the Left Ferris Wheel
(pIt)
and Jackpot (bb)
Flasher circuit (sol.
01C).
Using this "multiplexing" technique, the same driver transistor
can control actuation of two separate solenoid circuits.
3-:1189
Bulbs
(2-88,
1- PF)
8F1
2.SA,S-8
Typical
CYCLONE
+2SY
Circuit showing
the Function of AIC Select RelaYI Sol. 12
CYCLONE 29