Accuphase A-48S

@foolishman I would recommend to get professional tech./eng. help., small mistake can cause big $$$ loss. 

Meanwhile, do you think it is OK to change only connecting J3, J6? Or do I need to change other boards like the sub-transformer board?

Sorry for my ignorance, since the preamp doesn’t have a standby/power-on function, I didn’t know there was a sub-transformer board in it, could you post a photo of such a board?

By the way, always test with a DBT (Dim Bulb Tester) after voltage conversion to avoid any surprises!

@imhififan 

However, according to the brochure of C-2300, it is marked as 120V, 220V, 230V AC (voltage is shown on the rear panel).

I have checked the rear panel, but there's no such marking.

Would you please take a look at the following photos? I have marked one board. I was wondering if it is a board for standby/power-on function.

C-2300_1 (18) 1.JPG

C-2300_1 (19) 1.JPG

C-2300_1 (20) 1.JPG

Thank you in advance.

@foolishman 

Sorry, I can't clearly see and identify any components in the photo due to obstruction of wires. Can you post some clearer photos showing the auxiliary transformer? Is that power switch assembly board?

Thanks

@imhififan 

Here are images for those boards:

IMG_1290 1.jpg

IMG_1291.jpg

Hopefully, you will be able to identify some components from above images.

Thank in advance.