CPU connector CN10: switch row pins and wire colours

Row wires are white with a coloured trace, and the rows run backwards along the plug. Brown trace = row 1 (pin 9), red = row 2 (pin 8), orange = row 3 (pin 7), yellow = row 4 (pin 6), green = row 5 (pin 5), blue = row 6 (pin 3), violet = row 7 (pin 2), grey = row 8 (pin 1). Pin 4 is the key.

Systems

• Data East CPU Version 1/2
• Data East CPU Version 3
• Data East/Sega CPU Version 3b

Related tips

• Switch row (return) circuit on the CPU board
• Switch row trace map from CN10 to the 4011 chips
• Switch row or column error: CPU board or playfield?
• Switch column (drive) circuit on the CPU board
• Test the switch row inputs with a diode jumper
• One switch row dead: parts to check in order
• Pressing one switch closes the whole row: bad 4011 chip on the CPU board
• Which switches are outside the switch matrix

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part Three, Clay Harrell (pinrepair.com)