I bought my Spy Hunter upright at an auction. The music
control was turned down on the machine, and when I got home and turned
it up I quickly found out why. The music was distorted, scratchy, and garbled. Here's a video that does a better job explaining. The problem turned out to be the digital to analog converter at U10 (AD7533JN). A socketed chip! They have apparently been discontinued, but I was able to find one at an electronics surplus place. The chip is located at the arrow in the photo below. A quick swap, and everything was back to normal! |
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