1942 pinouts from gopstein@bms.com (Rich Gopstein)


Solder Side     Parts Side
GND A 1 GND
+5 B 2 +5
+12 C 3 +12
GND D 4 GND
Speaker - E 5 Speaker -
Speaker + F 6 Speaker +
Coin Counter - H 7 Coin Counter +
key J 8 key
Shoot 1 K 9 Up 1
Down 1 L 10 Left 1
Right 1 M 11 GND 1
Shoot 2 N 12 Up 2
Down 2 P 13 Left 2
Right 2 R 14 GND 2
2 Player start S 15 GND
1 Player start T 16 GND
Coin Switch U 17 GND
Service Switch V 18 GND
unused W 19 Loop 1
unused X 20 Loop 2
unused Y 21 Vid GND
Sync Z 22 Red
Green a 23 Blue
unused b 24 unused
unused c 25 unused
unused d 26 unused
+5 e 27 *
GND f 28 GND

* Pin 27 was blank in the manual, but it's probably +5v.