BattleZone Missing Sound

Takeman

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I dug out my spare boardset to test before I sell my BZ and found that the explosion sound is missing when my tank is hit or the enemy tank. The rest of the counds are present, loud and clear. Graphics work perfectly. I swapped around with my working set and the problem seems to be on the main board.

A little history, rebuilt AR, New big blue, reflowed header pins, giant red cap on aux board is present, replaced pokey & tried a Braze HS kit. With all of that, swapping ect. The problem has to be on the main board. I cant seem to find schematics.

Anybody have any idea what chip is responsible for the explosions?

Thanks
 
Thanks for the reply. I looked the schems over and I'm gonna go do some testing.

Ok, I did some more testing and I guess it is the aux board :p I replaced the lm324 and no luck. Must be a MC14066...I have to order a few of those...
 
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