Accuphase E-280 Voltage Conversion (100V to 120V)

Just buy a step-down AC transformer. No need to go poking around inside!

I have but I still want to change to 120V

Since you have a step-down transformer, you can confirm its transformer taps by power up the E-280 at 100VAC, using a DMM set to AC voltmeter, measure the voltage between yellow - orange, and between yellow - black, you should get both reading of 120VAC.

Swap the two wires:

RED <---> ORANGE

BLACK <---> VIOLET

That will convert the E-280 from 100V to 120V.

thanks imhififan

check voltage between yellow - orange, and between yellow - black,  should get both reading of 120V

Thks for the insights.  How would you convert from 100V to 240V?  Lokkkn g to purchase a unit from Japan. Thks!

@cj64 Hello, I'm about to do the same conversion. Just wondering how's your E280 after the modification. I suppose the last picture above is the post-modification (working at 120v) ? Thanks in advance for your feedback.

I suppose the last picture above is the post-modification (working at 120v) ?

@jcgoobee

Yes, if your E-280 has the same connections and color coded wires.

120V connection:

100V connection:

@imhififan That's super helpful. Thanks for helping out. I appreciate it. 🙏🙏🙏

Why dink around? Just buy the US model. Mines for sale, still In a sealed box.