Page 136 - WHO dunnit

LAMP MATRIX Yellow (B+)-~- Red I~ 1 2 3 4 5 6 7 8
Yellow- Yellow- Yellow- Yellow- Yellow- Yellow- Yellow- Yellow-
Brown Red Orange Black Green Blue Violet Gray
J137-1 J137-2 J137-3 J137-4 J137-5 J137-6 J138-7 J138-9
w 098 097 096 095 094 093 092 091
Red- RIGHT
1 Brown TRIXIE MAP CASE 1 BULLET SLOT RIGHT LOOP SLOT
J133-1090 RIGHT JACKPOT MARK CENTER
11 21 31 41 51 61 71 61
Red-
2 Black BRUNO FLASHLIGHT CASE 2 MIRROR TAX (I) PENTHOUSE BLACK SLOT
J133-2089 KEY LEFT
12 22 32 42 52 62 72 62
Red- RIGHT
3 Orange BUTLER MAGNIFYING CASE 3 DAGGER TA(X) I HOLE TRAIN LEFT
J133-4088 GLASS MARK COMBOS SPOT
13 23 33 43 53 63 73 63
Red- RIGHT
4 Yellow VICTORIA REVOLVER CASE 4 PRINT T(A)XI RIGHT TAXI RIGHT
J133-5087 SPIN CHASE SPOT
14 24 34 44 54 64 74 64
Red-
5 Green TONY LEFT CASE MATCHES (T)AX I ROULETTE DOWN NOT
J133-60S6 SPIN 5 ELEVATOR USED
15 25 35 45 55 65 75 65
Red- LEFT LEFT LEFT LEFT
6 Blue JET EXTRA HOLE FREE TAXI MIDDLE EXIT NOT
J133-70S5 BUMPER BALL MARK SPIN CHASE SPIN ELEVATOR USED
16 26 36 46 56 66 76 66
Reo- RIGHT
7 Violet JET WHO MYSTERY SHOOT NUDGE LEFT UP BUY-IN
J133-S OS4 BUMPER DUNNIT AGAIN SLOTS JACKPOT ELEVATOR BUTTON
17 27 37 47 57 67 77 87
Red- BOTTOM LEFT RIGHT LEFT RIGHT RIGHT
8 Gray JET RED LITE LANE LOOP LITE FREE START
J133-9083 BUMPER TAXI MARK MARK TAXI SPIN
18 28 38 48 56 68 78 68
J1XX = Power Driver Board
LAMP MATRIX CIRCUIT
The processor sends a signal to the column circuit, causing the output of the ULN-2803 to toggle. When point "A" drops low, the
TIP107 transistor conducts and point "8" changes to a high state. At the same time the processor drives the input of the 74LS74
low, causing a high at output "F". A high state at the base of TIP102 causes the transistor to conduct, bringing the row circuit to
ground and turning the lamp On.
The processor changes the input of the 74LS74 to a high state to turn the lamp Off.
In over current conditions the lamps are shut Off through the comparator. If the voltage at the negative input of the LM330 rises
above 1.4V the output changes to a low, which is fed back to the 74LS74 and shuts the row circuit Off.
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