2. amps-preamps
  3. 192224-144675

Accuphase A-48S

@imhififan 

Here are photos for rear of 3 boards you specified:

A-48S (7).JPG

A-48S (8).JPG

A-48S (9).JPG

I will appreciate very much if you would provide information on them.

Thank you in advance.

 

foolishman
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imhififan's avatar
imhififan
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imhififan's avatar
imhififan
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@foolishman 

Because of I don't have the preamp on hand, I can only assume it's a 100V, 120V and 230V multi-tap power transformer. The voltage settings are as follows:

J1, J4 = 100V

J2, J5 = 120V

J3, J6 = 230V

However, according to the brochure of C-2300, it is marked as 120V, 220V, 230V AC (voltage is shown on the rear panel). If so, connecting J1 and J4 will be 120V, connecting J2 and J5 will be 220V, and connecting J3 and J5 will be 230V. Please post your findings, thank you.

foolishman OP
70 posts
 

@imhififan 

Thank you very much for the information you provided. Regarding voltage on the rear panel, I will check and let you know.

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?

Thank you in advance.

 

westcoastaudiophile
485 posts
 

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

imhififan's avatar
imhififan
2,225 posts
 

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!

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