[LAU] Delta 66 woes

[Anders Hellquist]

+1 for dying capacitors.. that is IMHO the most common problem in equipment.

If capacitors can not filter out electrical fields, you will have lots of
hum and buzz.

/Anders

On Thu, Dec 19, 2019, 19:04 Len Ovens <len at ovenwerks.net> wrote:

> On Thu, 19 Dec 2019, Dave Phillips wrote:
>
> > My audio device has been an M-Audio Delta 66 + Omni I/O breakout box
> > that has served me well for many years. Alas, something is now causing a
> > severe problem with it. When I turn the unit on in the morning the clip
> > and input lights are solid red and green and remain so for up to five or
> > more minutes before they go off. Adding to that, my portable room heater
> > is now causing a terrible hum through my speakers. I tried another
> > heater, got the same results.
> >
> > So, is the problem likely the Delta card ? I have a replacement for it
> > that I could swap out, but I thought I'd check with the experts first.
> > Or should I get an electrician to check out the wiring in my room ?
>
> "clip and input lights are solid red and green" These lights are on the
> omni I am guessing and so likely the problem is with that box rather than
> the D66 card itself. Using mudita24 (not envy24control) on the Analog
> Volume tab do you see high level in? (the level for the input is in text
> just under the port name (ADC1-3) and can be reset with the "Rest Peaks"
> button in the lower left corner) If there is no level or -inf it shows
> "(off)". If you are seeing the same high level right after turn on, try
> disconnecting the omni i/o and see if the levels are now (after reset)
> "off". This test should show that the problem is in the i/o box.
>
> The most likely thig to be wrong is a capacitor. With the i/o box open
> find a larger cap probably close to where the power comes in and after
> warm up try spraying this with some kind of "freeze spray" to see if the
> problem comes back. replace tha cap that when chilled causes the probalem
> to come back. Probably replace the power supply cap just because...
> (higher value is ok)
>
>
> --
> Len Ovens
> www.ovenwerks.net
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> Linux-audio-user at lists.linuxaudio.org
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>
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