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Hi Brian, Russ
I'd been wondering about the state of my Mux for a while - getting pops when switching inputs. Thought there might be a grounding issue. I took my buffalo to a bake off recently and was surprised at how poor it sounded. Initially thought Ivy or PSUs might be the issue, but yesterday I took Mux out of the equation, linking toslink direct to buff and wham, all the life came back. So tonight I removed the Mux board to have a look over it. Couldn't see anything obvious, so put it back in, all wired as before. Now it won't lock, on any of its inputs. Tested with 2 different sources. The lock LED flickers away, occasionally appearing to get a lock, but when I try to play music I just get sporadic (literally I suppose) bits coming out.
Any ideas where to look to troubleshoot?
Separate issue - using my m-audio transit to supply optical input to the buffalo I get a digital squeal about a second after it locks on. Plays fine after that and only does this when I skip tracks or start a new album/track. Just wondered if you have any idea what this might be? Don't get this using optical out from cdp.
Cheers
James
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james.evans@frost.com wrote:Hi Brian, Russ
I'd been wondering about the state of my Mux for a while - getting pops when switching inputs. Thought there might be a grounding issue. I took my buffalo to a bake off recently and was surprised at how poor it sounded. Initially thought Ivy or PSUs might be the issue, but yesterday I took Mux out of the equation, linking toslink direct to buff and wham, all the life came back. So tonight I removed the Mux board to have a look over it. Couldn't see anything obvious, so put it back in, all wired as before. Now it won't lock, on any of its inputs. Tested with 2 different sources. The lock LED flickers away, occasionally appearing to get a lock, but when I try to play music I just get sporadic (literally I suppose) bits coming out.
1) Any ideas where to look to troubleshoot?
2) Separate issue - using my m-audio transit to supply optical input to the buffalo I get a digital squeal about a second after it locks on. Plays fine after that and only does this when I skip tracks or start a new album/track. Just wondered if you have any idea what this might be? Don't get this using optical out from cdp.
Cheers
James Hi James, I am coming at this blind not having any of your stuff to test. :) 1) Sounds like a damaged board. Hard to say how. Probably ESD. 2) Have no idea what coming from the source. I would start there. Cheers! Russ
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Rank: Advanced Member
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Thanks Russ
Is there any way I can send the MUX board back to be checked over?
Cheers
James
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Rank: Advanced Member
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Brian, Russ, I've been doing some more debugging on this. One thing I noticed yesterday was my placid supplying buff VD, mux, tos etc was sagging to just under 4v, so obviously too little current set. I put it back up to just under 250mA and I have 6v again. That got me wondering if the sag was causing the issue with the mux not locking. So today I thought I'd wire power back to the mux, running off buff VD. No signal wires connected between mux and buff. One of my tos modules is connected directly to buff, so I had music playing while switching inputs on the mux to test lock on other inputs. I did get a lock using cdp into my other tos module, so that's promising (not tested the output yet). One thing that surprised me though - when switching inputs on the mux the buffalo dropped out each time I switched. As mentioned, the mux isn't connected to the buffalo other than sharing its VD psu. Any thoughts on what would cause that? Is it anything for concern? ta James Edited by user Friday, April 16, 2010 5:27:49 AM(UTC)
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Rank: Administration
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The buffalo would have to re-lock on each new source, so switching them would cause it to drop out while it acquires a lock. That's normal.
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Rank: Advanced Member
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Thing is though Russ, there's no connection between mux and buffalo at all. I have a single tos module running into buff at the moment. The mux is merely powered off VD for testing, but not linked in any way. Any funny business going on with Gnd?
James
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Rank: Advanced Member
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Right, quick bit of rewiring and mux is locking and playing music again. Must have been the voltage sag on the placid causing the misbehaviour before. The thing I really want to get to the bottom of is the clicks and pops I get when changing inputs. Is this normal? Anything in particular to look for? ta James Edited by user Saturday, April 17, 2010 2:57:23 AM(UTC)
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