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One other thing to remember is that the transformers and PS/Signal(both analog and digital) wiring can still pick up EMI even when not being powered by the mains. You might see if the problem goes away when the case is grounded and closed up with the metal cover on. I must say I have never encountered anything quite like this. Once I cured my DC on the mains situation I never had another issue. It is the DC on the mains that causes the huge EMI impulses (at least in my case), and it can be quite strong. :) The wiring in your home becomes a big transmitting antennae and it is not that hard for a sensitive comparator like the one on the SPDIF receiver board to sense that small spike and react to it as an errant signal. and unfortunately the ES9018 is not forgiving with errors. Edited by user Tuesday, November 29, 2011 9:18:47 PM(UTC)
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FIXED! I jumpered the ground terminal to the - terminal for each S/PDIF input and the problem is gone. I cannot cause the DAC to lose lock from any source by switching the lights.
(Note that I only jumpered the COAX inputs. The TOSLINK module S/PDIF output appears to be grounded already at the TOSLINK board so I did not jumper a second ground to it at the S/PDIF board to avoid a potential loop.)
Thanks Russ for your help and patience. I wonder if this fix should be included in Leon's integration guide? Perhaps a note suggesting it as a possible fix for others who may suffer from EMI related lock issues.
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Very good. As I always say: All is well that ends well. I am very glad to help. I hope you can just sit back and enjoy the music now. :)
This fix should only be necessary in cases where there is a chance for some pretty strong EMI (such as you seemed to have).
I agree it would be a good thing to note.
Cheers!
Russ
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Rank: Administration
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Joined: 10/24/2006(UTC)
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Location: Nashville, TN
Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
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One very minor downside is that the fix breaks galvanic isolation from the source to the DAC, but honestly that is not a huge concern. In fact when using this approach one *could* (but its not necessary) totally remove the transformers on the SPDIF input board and simply use jumpers from the primary pads to the secondaries. :) Edited by user Thursday, December 1, 2011 6:52:43 AM(UTC)
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