Voltage conversion of Accuphase E-650

@eugene81
Your link to the picture doesn’t work. Is your board similar to this one?

https://tsuf4g.ch.files.1drv.com/y4pqy67e0jerv5cTcb-Fc8_ipC-EI1w1ykz_wR1ZBK_94kZcjKZQGJV5K16_Rt6XGkm...

Please upload your picture to your system page and provide a link.

@imhififan Yes, that's the board.  Sorry, let's try this again:

https://photos.app.goo.gl/qknm4Js8Pe2t58rR9
https://systems.audiogon.com/systems/3753#&gid=1&pid=1

https://photos.google.com/share/AF1QipOGrOpMMqsYdBSgXH2RZ5WAQr8ECpSKQ9lZeFPP-kK9lqHx94MR8pkv-HWnDXZq...

connector K3 needs to be moved to K5 and connector K4 moved to K6 as pictured here?

Yes.

Thank you!

I went ahead and did this myself and tested successfully with a dim bulb tester.

The amp sounds fantastic! It is somehow both crisp and clear, yet rich and slightly warm, with great texture and soundstage depth.

For others who might use this thread for reference, here are some more photos of the board removed, ready to work on, and post-conversion:

https://photos.app.goo.gl/7rQ1gaZM6zDN1E47A

Initially I thought it was one big board so I was going to take it to a pro. After being turned down by my usual tech (turns out they are an authorized Accuphase repair center and thus were told by Japan they couldn’t do it), I took another look under the hood and found that the connectors are actually on a smaller board secured by just 3 screws. I unplugged the 2 harnesses, 3 wires (blue, yellow, brown), and boom--easy access.