Pinout: B6 Games: Galaxian PCB Pinout Parts Side/Solder Side ------------------------------------------------------------- Ground | 1 | A | Ground ------------------------------------------------------------ Ground | 2 | B | Ground ------------------------------------------------------------- +5 Volts | 3 | C | +5 Volts ------------------------------------------------------------- +5 Volts | 4 | D | +5 Volts ------------------------------------------------------------- | 5 | E | ------------------------------------------------------------- | 6 | F | ------------------------------------------------------------- Coin Meter | 7 | H | ------------------------------------------------------------- Coin 2 | 8 | J | Coin 1 ------------------------------------------------------------- Service | 9 | K | Test ------------------------------------------------------------- 2P Start | 10 | L | 1P Start ------------------------------------------------------------- 1P Right | 11 | M | 2P Left ------------------------------------------------------------- 2P Fire | 12 | N | 1P Fire ------------------------------------------------------------- 2P Right | 13 | P | 2P Left ------------------------------------------------------------- | 14 | R | Cocktail/Upright ------------------------------------------------------------- Ground | 15 | S | ------------------------------------------------------------- TV Green | 16 | T | TV Red ------------------------------------------------------------- TV Sync | 17 | U | TV Blue ------------------------------------------------------------- Speaker - | 18 | V | Speaker + ------------------------------------------------------------- +12 Volts | 19 | W | +12 Volts ------------------------------------------------------------- +12 Volts | 20 | X | +12 Volts ------------------------------------------------------------- Ground | 21 | Y | Ground ------------------------------------------------------------- Ground | 22 | Z | Ground -------------------------------------------------------------