Voltage conversion of Accuphase A-48

I have checked the wiring of A-48 100V. Here's the actual wiring:

100V - 1=white+orange 2= red 3= blue 4= black+yellow 5= brown 6=none  

I could be wrong, but it look like wired to 120V

imhififan, do you have any reasons that looks like wired to 120V? Do you think both 100V and 120V are the same wiring?

to verify correct voltage can measure voltage on large capacitor terminals, which should be in a range 50V to 55V

Do you think both 100V and 120V are the same wiring?

No.

imhififan, do you have any reasons that looks like wired to 120V?

I was just guessing.
Maybe the A-48 just changed one set of primary winding color of wires (orange-red-gray) only, and kept the second set primary winding (yellow-brown-white) unchanged.

 https://upload.review33.com/avforum/201701/201701260134465700.jpg

Measuring DC resistance will give you the definite answer.