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Ramses

Need help with fixing A/V mod on my Colecovision

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I recently sent my Colecovision to an electronics repair guy to replace the IC chips as I was unable to desolder them myself. He was able to do it, though he needed to use a heat gun. I got it back today and the controllers work again! However, now I lost audio.

 

This is an A/V modded system I got off ebay years ago. I've searched around and I can't seem to find this particular mod anywhere. This one only has 2 wires that connect to the board, not 3 like the others seem to.

 

I've attached photos of the mod. As you can see, it is located next to the IC chips. I'm wondering if maybe a joint melted and connected with something it shouldn't have when the guy was using the heat gun. Does that sound likely? The video works fine and still looks great. I'm just not getting ANY audio at all.

 

Anyone have any ideas?

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That's the LM318 mod. That mod board is only for video. The audio should just be a wire that runs from a solder point either from the RF modulator or pin 7 of the SN6489AN to the audio jack.

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Ahhh, okay that makes more sense now. So how does this picture look? The grey wire wasn't attached to anything when I took it apart. I'm guessing it might have come off the RF modulator when I first opened it up. It's too short to reach the SN76489AN. Where exactly should it be connected to the RF modulator?

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Audio should be tapped off the left leg of the C88 capacitor as seen in the picture

 

So the grey wire in the latest pic should be attached there?

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