EDIT - I went back and carefully checked out my original (good) TD-11 and some of the switching things I thought were wrong on the second unit are true of the good unit as well. It looks like the only issue on the second TD-11 that I just bought used may be a non-responsive Optical input. I took out all of the non-relevant information in this post. I can't edit the title but it should be, "Any fix for no Optical input on TD-11?"
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I have a TubeDAC-11 and love it. (Many thanks to Ian and Rachel for hours of pleasant listening.) I recently bought a second TD-11 from an AK member. He had some issues with it when using the Optical input but it seemed like it might have been a problem with the Optical source. Not so, it seems. This TD-11 works fine on both Line inputs, on the USB input and on the SPDIF input.
The Optical input doesn't work at all. The "Digital" light doesn't come on and there is no sound. I have a known good Optical source and my original good TD-11 for comparison.
I have opened up this TD-11, cleaned up the PCB, inspected both sides for shorts, dirt, etc., and have touched up some solder joints that looked a bit questionable. I also cleaned the Source switch with DeOxit and cleaned the optical input connector. None of this helped at all.
I THINK I'm hearing some different relay clicking sounds between the two TD-11s when I rotate the Source knobs. I think it's time to walk away from this for a while and see if it makes more sense when I get back...
Any ideas on what this could be? Could it be as simple as a bad Optical connector or is it something within the circuits themselves? Could it be a bad relay? I'm an EE and am pretty good at fixing electronics but repair of surface mount chips is probably beyond my skill level and the tools I have. Thanks for any suggestions.
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I have a TubeDAC-11 and love it. (Many thanks to Ian and Rachel for hours of pleasant listening.) I recently bought a second TD-11 from an AK member. He had some issues with it when using the Optical input but it seemed like it might have been a problem with the Optical source. Not so, it seems. This TD-11 works fine on both Line inputs, on the USB input and on the SPDIF input.
The Optical input doesn't work at all. The "Digital" light doesn't come on and there is no sound. I have a known good Optical source and my original good TD-11 for comparison.
I have opened up this TD-11, cleaned up the PCB, inspected both sides for shorts, dirt, etc., and have touched up some solder joints that looked a bit questionable. I also cleaned the Source switch with DeOxit and cleaned the optical input connector. None of this helped at all.
I THINK I'm hearing some different relay clicking sounds between the two TD-11s when I rotate the Source knobs. I think it's time to walk away from this for a while and see if it makes more sense when I get back...
Any ideas on what this could be? Could it be as simple as a bad Optical connector or is it something within the circuits themselves? Could it be a bad relay? I'm an EE and am pretty good at fixing electronics but repair of surface mount chips is probably beyond my skill level and the tools I have. Thanks for any suggestions.
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