Voltage conversion of Accuphase E-650

@imhififan I really appreciate your sharing! This doesn't only help me but also those who have the same need in the future. 

Your answers address more than what I have asked!

I have another question though, after desoldering K3 to K5, do I need to fill the empty holes in K3 and K5 with lead or they are ok to be empty?

@imhififan I'm sorry for my typo, please ignore my previous questions. What I meant is: after desoldering K3 to K5, K4 to K6, do I need to fill the empty holes in K3 and K4 with lead or they are ok to be empty?

Yes, Fill the empty holes in K3 and K4, it will increase the mechanical strength of the PCB especially holes with through hole plating. 

Hope this helps

@imhififan Many thanks!!!

HIi @imhififan,

you are a specialist as I understood:-)

I want to switch my Dp900 & DC901 from 100v to 230v. Any idea if thats already discussed here in an other post? Or do you have an explanation already?

In the older models it was much easier to do as it was described more or less in the device itself...

Thanks in advance.