Everything You Ever Wanted to Know About
Mr. & Mrs. Pac-Man Pinball Solenoid and Lamp Assignments

Baby Pac-Man uses an AS-2518-107 Lamp/Solenoid Driver Combo board instead of the usual driver boards found in other Bally solid states. This board has 14 soleonid driver circuits and 30 lamp driver circuits. It also contains the 5-Volt regulator and the flipper enable relay. To complicate things, the lamp drivers can control 2 lamps each, one on the "A" phase and the other on the "B" phase. I'm not exactly sure what this means, but I assume this refers to the AC voltage used to power the controlled lamps. Unlike other rectifier boards, the AS-2518-132 rectifier board used in this machine does not rectify the voltage used for the controlled lamps, so half work on the positive cycle of the AC voltage, and the other half work on the negative cycle.

The following table lists each driver transistor, the coil it drives,
the pre-driver IC associated with it along with the pin numbers of the base and collector (respectively),
and the decoder IC BINARY input signals (ABCD) and output pin number.

TIP-102 Transistor	Coil	CA3081 Pre-Driver IC	74L138 Decoder*
Q31	#5 Drop Target, Right Side	U3, 16, 1	110/9
Q32	Not Used	U3, 10, 9	101/10
Q33	#3 Drop Target	U3, 11, 12	100/11
Q34	Not Used	U3, 13, 14	011/12
Q35	#1 Drop Target, Left side	U5, 16, 1	010/13
Q36	5 Drop Target Reset	U5, 6, 4	001/14
Q37	Outhole Kicker	U5, 8, 7	000/15
Q38	Right Maze Saucer	U5, 10, 9	n/a
Q39	Left Maze Saucer	U5, 11, 12	n/a
Q40	Flipper Enable Relay	U5, 13, 14	n/a

*NOTE*
"n/a" Decoder info indicates these drivers get their signals as continuous
solenoids directly from the MPU at A4J4-8, 9, and 10 and not the Decoder IC.

This table lists all the 2N5060 SCRs on the Lamp Driver module, the name of the lamp it drives,
the decoder IC associated with the SCR along with the BINARY input signals (AD0, AD1, AD2, AD3) and output pin,
and the name of the 2K Ohm resistor (red/black/red) connected to the decoder output.

2N5060 SCR Lamp MC14514 Decoder 2K Ohm Resistor Q1 Pac Man Maze Aggressive U1, 0111/4 R7 Q2 #1 Pac-Man U1, 1101/13 R3 Q3 #5 Pac-Man U1, 1110/16 R2 Q4 "Up" Direction Arrow U1, 1011/19 R1 Q5 3-Drop Target 20K U1, 0110/5 R8 Q6 #8 Yellow Pac Maze U1, 0001/9 R12 Q7 #12 Yellow Pac Maze U1, 0010/10 R13 Q8 #4 Yellow Pac Maze U1, 0000/11 R14 Q9 #2 Pac-Man U2, 1101/13 R15 Q10 "M" Right Drop Target U2, 1110/16 R11 Q11 "A" Left Drop Target U3, 0111/4 R10 Q12 "Right" Direction Arrow U2, 1011/19 R9 Q13 "P" Left Drop Target U2, 0111/4 R22 Q14 3-Drop Target 30K U2, 0110/5 R23 Q15 #7 Yellow Pac Maze U2, 0001/9 R27

2N5060 SCR Lamp MC14514 Decoder 2K Ohm Resistor Q16 "A" Drop Target U3, 1110/16 R26 Q17 3-Drop Target Pac-Man U3, 0110/5 R25 Q18 #2 Yellow Pac Maze U3, 0000/11 R45 Q19 #22 Yellow Pac Maze U3, 0101/6 R38 Q20 #6 Yellow Pac Maze U3, 0001/9 R41 Q21 "Down" Direction Arrow U3, 1011/9 R24 Q22 #4 Pac-Man U4, 1101/13 R44 Q23 #10 Yellow Pac Maze U3, 0010/10 R43 Q24 "N" Right Drop Target U4, 1110/16 R42 Q25 Left Gate Arrow U4, 1001/17 R40 Q26 #5 Yellow Pac Maze U4, 0001/9 R55 Q27 #9 Yellow Pac Maze U4, 0010/10 R56 Q28 Credit Indicator U4, 1010/20 R37 Q29 "Left" Direction Arrow U4, 1011/19 R39 Q30 #1 Yellow Pac Maze U4, 0000/11 R57

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NOTES

I got all this information from the schematics and pretty much copied it verbatim.

If you notice any mistakes (I'm only human), please let me know and I'll fix it up.

If you need to know which solenoid driver transistor goes to which solenoid driver board connector, Click Here.

If you need to know which lamp SCR goes to which lamp driver board connector, Click Here.

[Steve's Page] [Pinball] [Bally] [Bally Solenoid/Lamp Drivers]

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Created 1/15/03 - Last Modified 5/14/03 - Steve Kulpa Nolensville, TN
Remove the NO_S*P*A*M_ to reply

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