Brauner VM1S, Manual, Page: 9 / 14

The ground lift switch detaches the ground pin (pin 1) of the XLR output from ground
and can be set to three positions. Safety earth is never detached of course. Use the
switch to eliminate hum problems you might have.
Lower position: (H)ard-ground: The ground pin is conductively connected to the
ground center of the internal circuit.
Mid position: Ground-(L)ift: The ground pin is completely disconnected from ground.
Upper position: (S)oft-Ground: The ground pin is connected to the ground via a safety
capacitor that decouples the AC portion of the hum to the ground.
On the back panel of the power supply there are four connectors: power, microphone
(Tuchel connector) and the two signal outs (XLR phase signal on pin 2). Additionally
there is a ground lift switch for each XLR out and the voltage setting/fuse holder.
3.2 Power Supply Back Panel
3.3 Ground Lift Switch
Before operating the microphone at a new location always make sure the voltage is
set to the right value. It can be set to either 115V or 230V.
To change the setting, turn off the power supply and disconnect the power cable.
Take out the fuse holder which is right next to the power connector by squeezing
the little latch. On the back of the black fuse holder is a grey plug-in which you can
pull out, turn around and push back in again to switch the voltage setting. Make sure
the right voltage number can be seen in the little window on the other side of the
fuse holder. If you need to change fuses you can do so now before inserting the fuse
holder back into the power supply again.
We suggest that you always check the setting when you travel somewhere, or make a
note and stick it to the power supply if you have changed the setting. Fuses are cheap,
but usually not around when you need them.
Exchange fuses only with the same type (at 115V mains voltage: 800mA/230V time
lag, according to DIN 41662).
3.4 Adjusting The Voltage Selector/Changing Fuses
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