Spendor

Help with Neumann U67 power supply
« on: June 02, 2008, 04:26:25 AM »
Hello all - my power supply has a fault. The power light on the outside glows with the switch on or off. The switch seems to work in itself, and even with the fuse out the light still glows. No signal from the mic at all - any help appreciated as i need to use the mic in a couple of days.
Thanks all.


gyraf

Help with Neumann U67 power supply
« Reply #1 on: June 02, 2008, 06:25:42 AM »
Schematic: http://www.triodeel.com/u67ps.gif - pretty simple..

..check voltages with microphone connected!

don't worry too much about the neon light behaviour, it'll light up on all sorts of power ground loops, and shouldn't affect functionality.

I have one that only lights up when psu is connected, but powered off. Pretty confusing until you figure it out..

Jakob E.
..note to self: don't let Harman run your company..

Spendor

Thanks
« Reply #2 on: June 02, 2008, 09:31:46 PM »
Thanks very much - invaluable info!


 

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