R-Type Sound issues - Only in Attract Mode

Phetishboy

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When I first power the machine up, after it boots, the attract mode starts with the sounds of the ship shooting, but they come out all distorted and scratchy. The minute I credit the machine up, or sometimes even just push the 1 or 2 player button, the sound distortion stops and everything is OK in both attract and game mode. Anyone ever run into this before? Where should I start looking? Chips, amp, ribbon cable, psu? Thanks.
 
When I first power the machine up, after it boots, the attract mode starts with the sounds of the ship shooting, but they come out all distorted and scratchy. The minute I credit the machine up, or sometimes even just push the 1 or 2 player button, the sound distortion stops and everything is OK in both attract and game mode. Anyone ever run into this before? Where should I start looking? Chips, amp, ribbon cable, psu? Thanks.

http://forums.arcade-museum.com/showthread.php?t=148256
 
Holy shit. But it was never resolved? I still can't get mine into freeplay, so it must be the dipbanks.

If you turn on 5,6,7, and 8 of Dipswitch 1 and it still doesn't go into Free Play you could have a bad switch, or maybe cold solder joints.

If you have a multi-meter you can test the switch and see if it's good or not. If the switch is good, and there are no cold solder joints then you might have a more serious issue.
 
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