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MAIN I/O
 ---------------------+--------------------------
                PARTS | SOLDER
 ---------------------+--------------------------
         P1 Down   01 | A   P2 Down
           P1 Up   02 | B   P2 Up
         P1 Left   03 | C   P2 Left
        P1 Right   04 | D   P2 Right
            NC 1   05 | E   NC 5
            NC 2   06 | F   NC 6
            NC 3   07 | H   NC 7
         Service   08 | J   Tilt
      P1 Shoot 1   09 | K   P2 Shoot 1
      P1 Shoot 2   10 | L   P2 Shoot 2
 1 Player Select   11 | M   2 Player Select
          Coin 1   12 | N   Coin 2
       Counter 1   13 | P   Counter 2
        CRT Blue   14 | R   CRT Green
        CRT SYNC   15 | S   CRT Red
            NC 4   16 | T   NC 8
       Sound (+)   17 | U   Sound (-)
           +12 V   18 | V   -5 V
            +5 V   19 | W   +5 V
            +5 V   20 | X   +5 V
         CRT GND   21 | Y   GND
             GND   22 | Z   GND
 ---------------------+--------------------------

*NOTE: Pin 19 & W seem to be linked together. The image is smudged,
       but it appears to show 74(RST





CN-1    (HRS CR7E-44DA-3.96E)
This is the only information about CN-1 except 
for a *note* written in Japanesse and
a general harness layout shown below.




CN-2    (MOLEX 1625-15R-1)
 ----------+-------------------------
 MAIN I/O  | PIN# CN-2
 ----------+-------------------------
         Y | 01  GND
        04 | 02  Right
        03 | 03  Left
        02 | 04  Up
        01 | 05  Down
        09 | 06  Shoot 1
        10 | 07  Shoot 2
        05 | 08  NC 1
        06 | 09  NC 2
        07 | 10  NC 3
        11 | 11  1 Player Select
         M | 12  2 Player Select
        16 | 13  NC 4
           | 14  open
           | 15  open
 ----------+-------------------------



CN-3    (MOLEX 1625-06R-1)
 ----------+-------------------------
 MAIN I/O  | PIN# CN-3
 ----------+-------------------------
           | 01  open
        12 | 02  Coin 1
           | 03  GND ------+ (link)
           | 04  open      |
         N | 05  Coin 2    |
         Z | 06  GND <-----+
 ----------+-------------------------



CN-4    (MOLEX 1625-03R-1)
 ----------+-------------------------
 MAIN I/O  | PIN# CN-4
 ----------+-------------------------
        18 | 01  +12 V
           | 02  open
 13 ---+
       +-->| 03  Counter
  P ---+
 ----------+-------------------------



CN-5    (AMP 171822-6) (AMP 170262-1)
 ----------+-------------------------
 MAIN I/O  | PIN# CN-5
 ----------+-------------------------
           | 01  open
        15 | 02  CRT SYNC
        21 | 03  CRT GND
        14 | 04  CRT Blue
         R | 05  CRT Green
         S | 06  CRT Red
 ----------+-------------------------



CN-6    (MOLEX 1625-03R-1)
 ----------+-------------------------
 MAIN I/O  | PIN# CN-6
 ----------+-------------------------
        17 | 01  Speaker (+)
         U | 02  Speaker (-)
           | 03  open
 ----------+-------------------------



CN-7    (MOLEX 1625-06P-1)
 ----------+-------------------------
 MAIN I/O  | PIN# CN-7
 ----------+-------------------------
        22 | 01  GND
        18 | 02  +12 V
        20 | 03  +5 V
         Z | 04  GND
         V | 05  -5 V
         X | 06  +5 V
 ----------+-------------------------



General Harness Layout
Lengths in mm

               +---+---+
               | CN-2  |
               +---+---+
                   |
                   |                                   +-------+
                   +---------------+-------------------+ CN-5  |
                   |               |                   +-------+
                   |               |
                   |           +---+---+
                   |           | CN-6  |
                   |           +-------+
                   |
 +------+---       |
 |      |   --     |
 |      |     -    |
 | CN-1 |      ----+
 |      |     -    |            
 |      |   --     |            +-------+
 +------+---       |            | CN-4  |
                   |            +---+---+
                   |                |
                   |                |                  +-------+
                   +----------------+------------------+ CN-3  |
                   |                                   +-------+
                   |
               +---+---+
               | CN-7  |
               +-------+