Hi Dan,
I suspect a shorted de-coupling cap across the 48v rail, on one of
your modules. I don't know the S-I consoles, but the later consoles
(Elite, Elan, Etc.) had a problem with the .1uf ceramic caps in that
position. I just looked at my Series-II docs, and it has a 4u7, 63 volt
electrolytic in that position (C-104). So the S-1 might have either kind
of cap, and electrolytic caps can also fail short.
One other thing I would do is check all of the inputs with either a
dynamic mic or a passive DI and see if you get the same level on every
channel. If not, there may be a short of another kind (like Pin-2 or 3
shorted to ground) that is dragging down the 48v rail.
Good luck.
Ike
Dan McLoughlin wrote:
Hi,
This is my first time posting to this list. I own a Series 1E 16X8X2
console. Recently the power supply went and I replaced it with an
Acopian and now the console works great.
The problem is that the power supply is putting out 48V which is
getting to the master section module via the pigtail, but once the
molex is plugged into the master section I notice a voltage drop and
phantom power is NOT distributed to the input modules like it was
before the power supply went. When I unplug the molex and test the
output voltage from the power supply, it's 48V.
I can't seem to find a local tech who is too knowledgeable about this.
Any suggestions/solutions/advice would be much appreciated.
Thanks,
Dan
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--
Ike Zimbel
Zimbel Audio Productions Ltd.
Toronto
416-720-0887
"Studio House Calls" - Repairs and upgrades to analog audio equipment including:
Amek, Allen & Heath, Neve, Neotek, MCI, Soundcraft and more.
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