Resistor R17 on the Buck Rogers sound board is 270k ohms.

Buck Rogers C-19389 Sound Board Schematic

If one or more sound is not playing, like 10pt sounds never work, and/or tilt sound never works, make sure the signal makes it to the sound board and goes through the 7404 chip. You could stick a logic probe on the right side points of the 7404 as shown on schematic and make sure you get a pulse when the sound should play. Might need an extra set of hands or clips to trigger PF switches while working/watching the logic probe.

Rough bench test of the 7404 would be DMM on diode test, red lead on ground. Black lead check the 7404 legs (1, 2, 13, 12, 3, 4, 5, 6, 11, 10) and see if any read 0.00 or infinity. Generally would would want to see about 0.4v or so on the right side output pins. Not a fool proof test, but each circuit should test about the same and if you find a pin shorted to ground internally through the chip its definitely bad. The input side, left has pullup resistor which will effect the diode test, but if if one is shorted you will still notice its different from the rest.