yes you have the wrong sound board. That one is from older games like Pheonix, World Cup and such. The board you need is a twp piece board connected by a ribbon cable. The little board is the speech portion of the board and the bigger half is all the sound effects. If you have ever seen Defender video game sound board it is the same as the one your looking for but without the added speech half. If that makes sense to you. It shouldn't be to hard to find the correct sound for you game.

Indeed not the original board and as pinballer1 noted the boards you need have is for the early system 6 games. The later double boards (sound and speech) you'll find in Black Out, Gor Gar, etc.

At least it has the correct sound ROM.

This is what you need:

http://ksarcade.net/sound-speech-1/williams-system-6-7-sound-with-speech-module-d-8224.html

He might work out a credit exchange for your old board. Give him a call.

However you will need the mounting brackets for the boards as they are missing. The board is not supposed to be screwed directly into the backbox like that.

viperrwk

One additional remark: sound roms are easy to find and can be purchased at different stores

They shouldn't be that difficult to find as there were so many produced in the early eighties!
$50 seems reasonable to me, but both boards should be at least working!

Good luck, Fire Power is very nice pin to own! I had two in the past, one with drop targets and 7 digit display installed.

There are 2 boards, one for sound and another for speech. You can buy aftermarket new ones if you cant find any used.

Used pair in the market $50
Sup syt!