On 08/27/2016 12:44 AM, Ralf Mardorf wrote:
On Fri, 26 Aug 2016 20:08:54 -0700 (PDT), Len Ovens wrote:
On Sat, 27 Aug 2016, Ralf Mardorf wrote:
On Fri, 26 Aug 2016 17:51:25 -0400, jonetsu@xxxxxxxxxxxx wrote:
On Fri, 26 Aug 2016 22:50:27 +0200 Ralf Mardorf wrote:
Why isn't it happening all the times, if the capacitors are dried
out?
There would be a transition time I think.
This could be possible.
If they are dried out, then capacitance got lost. If the the oxide
coating is broken, they short.
What is a capacitor used for, that could cause delayed trouble, if
it's broken, instead of causing the trouble all the times?
IIUC you hear the crackling only, if there is an audio signal,
there's no crackling, without an audio signal.
This page indicates that the power supply caps.... well the whole
power supply, is less than adequate already.
Again guessing. This card is not an amplifier that requires a big
reliable power supply, neither it's comparable to a CRT, that has got a
high power consumption.
I do not own this card,
Hi Ralf,
We do own several of these cards but don't use them anymore. The 1010
card was the first magically affordable 8 channel solution for our
needs. There was even a smaller box that could intercept the digital
signals and provided digital multichannel connections. We still have
them around lying in plastic bins (some were recycled). Such a shame.
For old timers in this list the power supply issue on the 1010 is well
known. The voltage doubler (or quadrupler?, I forget) capacitors in the
power supply blow up after a while due to bad design. The 5V rail is
still there but the analog voltages go down or disappear, so the card
still "works" but all audio is gone or badly distorted. Replacing the
capacitors fixes everything (visual inspection can easily reveal if that
is the problem).
-- Fernando
so I ask questions to perhaps provide more than
just guessing. I didn't find a circuit layout, but already tried to
read on a photo what is printed on the large TO-220 package component.
I didn't find a photo where I could read what's printed on it, but
while searching such a photo, I found this
https://offog.org/notes/delta-1010lt-repair/
So the two capacitors close to the large TO-220 package component are
reservoir capacitors. Note, my PCI Envy24 cards have a voltage
regulator were the delta seems to have one, too. At the further end of
the large TO-220 package component, there are two small capacitors and
something that looks like a miniature edition of a TO-220 package. On my
cards it's a 1117 voltage regulator.
However, assuming that the provided power by the computer's power
supply should be too fluctuating, to feat the stabilisation of the
delta, I would suspect more dramatic effects. If the stabilisation
should be the reason for the issue, then I would expect broken
capacitors on the audio card.
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@xxxxxxxxxxxxxxxxxxxx
http://lists.linuxaudio.org/listinfo/linux-audio-user
