Accuphase E-408 voltage conversion

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

Thanks for the help. I probably won't be able to do this work on my own. I don't know any trustworthy specialists in our city. Probably only a photo of the power board with 230 volt jumpers installed or a service manual would be the ideal solution to my problem. Sincerely, Victor.

Thank you for your response, unfortunately the manufacturer does not provide such information. I tried to find a service manual, but it is not freely available.

Thanks for the answer, I can not upload a photo, the forum interface is incomprehensible to me. I have an external step-down transformer, but I would like to convert the amplifier to 230 volts. On various forums, users confirm that all Accuphase amplifiers have multi-voltage transformers that can be switched to 100, 120, 220-240 volts.

@imhififan

Thanks for the answer, below is a photo of the board and the transformer circuit

@imhififan ​​​​​​

Thanks a lot for your real help!

Later I will disassemble the amplifier and check the position of the jumpers.

P.S. For some unknown reason, links to photos in my previous posts have been removed.

@imhififan 

@holmz 

I checked everything, the amplifier works well.

Thanks for your professionalism. You have done me a great service.

Kind regards,

Victor 

@imhififan 

I checked everything. You absolutely accurately indicated the position of the jumpers!

Before changing jumpers, resistance across C2 is 0,5 Ohm.

After the prayer, I will start voltage conversion :)

As you advised, I will turn it on through the light bulb.

The photo above shows the initial position of the jumpers J1-J3

@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?