Denon Cd-r-1500w

May be it can help Most of the time they had their power transistors fried so it was a simple matter of replacing them. But I noticed on a quite a few models that you could select the power source voltage at the power supply transformer board. The windings were such that you could programme the transformer to accept either 120 or 240 VAC. Frequency isn't an issue. If you can find a reputable electronics repair facility somewhere, you could have them take a peek inside. If possible, make the jumper selections for 240 and change the plug.

The straight forward approach that many people suggest is simply a step-down transformer. The windings are half the number on the output compared to the input: a ratio of 2:1. So 2 volt in, 1 volt out. The amount of iron and number of turns of copper wire keeping the ratio would decide the amount of current that can be supported. Using a resistive load, a 1000W (the amount of WORK to be done) load would require over 8.3 amps at 120VAC. I would round it off to 10 to be on the safe side. That means the input would have to handle 5 Amps at 240 VAC. We're keeping that ratio. The specs for a similar unit to the one you have shows the power consumption of 710W at 120VAC at full blast and 0.1W idling. If your system is similar, we're looking at 3 Amps at 240 or 6 Amps at 120. A 1000W transformer with a 2:1 ratio would do the trick.

Someone mentioned unplugging the transformer when not in use to prevent a blown fuse. That isn't true. That fuse blew for a different reason. You can keep it plugged in. Your Amplifier is most likely always on even when turned off.

On a band trip to England (our home was Toronto), I needed to source a step-down transformer to power my electric bass and my buddies keyboard. I simply took a 1:2 ratio transformer and used the output as the input. That got me the 120VAC. Of course, I matched the power.

Thanks

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Techygirl