Champion Baseball Pinout
Parts Side (A) Pin Solder Side (B)
GND 1 GND
GND 2 GND
  3  
Sound Out (note 1) 4  
+12V 5 +12V
2-Down 6 2-Up
2-Right 7 2-Left
1-Right 8 1-Left
+5V 9 +5V
2-Steal 10 1-Up
2-Main 11 1-main
2-Start 12 1-Steal
1-Start 13 Coin-1
1-Change 14 1-Down
  15 Red
Blue 16 2-Change
Green 17  
Sync (note 2) 18 Coin-2

Note 1:  The Sega manual cabinet wiring diagram indicates "Sound Out" is connected through a 100ohm POT to the speaker for volume control. The other end of the speaker should be connected to ground.


Note 2:  The bottom card has jumper pad for Positive versus Negative Sync.
Note: VR1 controls the Music volume, VR2 controls the Voice/Speech.