Hi there,
I am using an ICE POWER amplifier. There are two jumpers for 115V and 230V. So normally, if I make the 115V jumper ON and leave the 230V jumper empty, my amplifier will use 115V.
Today I have realized that, on a similar project (PWR-ICE125), MiniDSP has used a permanent jumper cable on the 230V jumper. So it is always connected. On the 115V jumper they have used a simple on/off switch. If the switch is ON, both jumpers are connected. And the switch says 115V. If the switch is off, only the 230V jumper is connected.
So I naturally think that if both jumpers are connected, the amplifier works in 115V. Is this possible?
I am using an ICE POWER amplifier. There are two jumpers for 115V and 230V. So normally, if I make the 115V jumper ON and leave the 230V jumper empty, my amplifier will use 115V.
Today I have realized that, on a similar project (PWR-ICE125), MiniDSP has used a permanent jumper cable on the 230V jumper. So it is always connected. On the 115V jumper they have used a simple on/off switch. If the switch is ON, both jumpers are connected. And the switch says 115V. If the switch is off, only the 230V jumper is connected.
So I naturally think that if both jumpers are connected, the amplifier works in 115V. Is this possible?
Usually equipment with selectable 115/230V works by being wired as a voltage-doubler when in 115V mode while wired "normally" when in 230V. Look at the capacitors - if you see a pair of capacitors rated for 200V wired in series instead of a single one rated for 400V, it has a voltage doubler.
The voltage doubler works by... well to summarize, by adding an extra connection from neutral to that point between the two capacitors. That's what the selector switch does.
So the question becomes what does the 230V jumper do. Only somebody looking at the schematic will know.
Or maybe it really does nothing.
The voltage doubler works by... well to summarize, by adding an extra connection from neutral to that point between the two capacitors. That's what the selector switch does.
So the question becomes what does the 230V jumper do. Only somebody looking at the schematic will know.
Or maybe it really does nothing.
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