Accuphase E-408 voltage conversion

 Above view of the board with the position of the jumpers at 100 volts

@zeptul 

For the soft start resistors, J3 provides highest resistance and should be good for 220V/240V mains, therefore no changes required.

@imhififan 

Thanks for reply.

I'll write a report after the changes are made.

Kind regards.

@imhififan

I did everything according to your instructions. Jumpers J3, J4, J8 installed (240 volts). The rest of the jumpers have been removed. After setting the jumpers to 240 volts, the resistance between the contacts C2 increased from 0.5 to 2.1 Ohms. Connected power through a 100 watt light bulb. At first, the light bulb burns brightly, then gradually the glow decreases. At the same time, the VU meters light up. Didn’t notice a burning smell. I recorded a video, please watch. Is this a normal reaction? Is it possible to turn on the amplifier directly without a light bulb?