P.O.W.
SOLDER SIDE                         PARTS SIDE
-----------------------------------------------------

 A  GND                              1   GND
 B  GND                              2   GND
 C  +5V                              3   +5V
 D  +5V                              4   +5V
 E  -5V                              5   -5v
 F  +12V                             6   +12V
 H  KEY                              7   KEY
 J  COIN CTR 2                       8   COIN CTR 1
 K  COIN LOCKOUT                     9   COIN LOCKOUT
 L  SP -                            10   SP +
 M                                  11
 N  VID GN                          12   VID RED
 P  SYNC                            13   VID BL
 R  SVC                             14   VID GND
 S                                  15   TEST
 T  COIN 2                          16   COIN 1
 U  2 PL START                      17   1 PL START
 V  PL 2 UP                         18   PL 1 UP
 W  PL 2 DOWN                       19   PL 1 DOWN
 X  PL 2 LEFT                       20   PL 1 LEFT
 Y  PL 2 RIGHT                      21   PL 1 RIGHT
 Z  PL 2 BUTTON 1                   22   PL 1 BUTTON 1
 a  PL 2 BUTTON 2                   23   PL 1 BUTTON 2
 b                                  24
 c                                  25
 d                                  26
 e  GND                             27   GND
 f  GND                             28   GND