1n4004 - The most common diode - Switch matrix, flipper coils - SS or DMD pins. The "universal" diode. You can use a 1N4007.
1n4148 - Faster switching diode can be used on SYS1 Switch matrix
These are the two generic didoes used for playfield applications.
There are TONS more diodes - Zener / voltage reducing etc that are used on power supplies, driver boards etc.