PARTS SIDE | SOLDER SIDE -------------------------------------------------- (+5V) Gnd | A | 1 | Gnd (+5V) (+5V) Gnd | B | 2 | Gnd (+5V) +5V | C | 3 | +5V +5V | D | 4 | +5V (?) Credit Mult. | E | 5 | Power Credit Mult. (?) (Not Used) | F | 6 | Coin Meter Coin Sw. | H | 7 | NC (?)* 1P Start | J | 8 | 2P Start P1 Up | K | 9 | P2 Up P1 Down | L | 10| P2 Down P1 Right | M | 11| P2 Right P1 Left | N | 12| P2 Left P1 Smoke | P | 13| P2 Smoke Credit Sw. | R | 14| Test Pos. | S | 15| Gnd (Cocktail only) (Common) Gnd | T | 16| Gnd (Monitor) Red | U | 17| Green Blue | V | 18| Comp. Sync Spkr | W | 19| Spkr +12V | X | 20| +12V (+12V) Gnd | Y | 21| Gnd (+12V) (+12V) Gnd | Z | 22| Gnd (+12V)