Tank Battalion Pinouts
GamePlan < Namco, 1981

                      Parts           Solder
-----------------------------------------------------------
                     14V CT | A | 1 | 14V CT
                     14V CT | B | 2 | 14V CT
                      7V AC | C | 3 | 7V AC
                      7V AC | D | 4 | 7V AC
                            | E | 5 | +7.5VDC [to Coin Cntr]
                            | F | 6 | 
                            | H | 7 | Coin Counter
                     Coin 1 | J | 8 | Coin 2
                       Test | K | 9 | Service
                   P1 Start | L | 10| P2 Start
                       Left | M | 11| Right
                      Shoot | N | 12| 
                            | P | 13| 
                            | R | 14| Down
                        Gnd | S | 15| Gnd
                        Red | T | 16| Green
                       Blue | U | 17| Sync
                            | V | 18| Audio Out [to pot]
                     12V AC | W | 19| 12V AC
                     12V AC | X | 20| 12V AC
                         Up | Y | 21| 
                     24V CT | Z | 22| 24V CT

Notes:
"CT" is "Center Tap" on the power transformer.  If you jumper
the diodes to convert this board like Pac-Man or Galaxian to
JAMMA, these will become Gnd.