Voltage conversion of Accuphase A-65 or A-70

@imhififan 

How about the Accuphase A-80? I post some pictures of the power supply board for the A-80:

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173752&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173751&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173750&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173749&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173748&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173747&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173754&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173753&parId=6E164E2EDFDD40F6%21120&o=OneUp

I will appreciate very much if you would provide information on how to convert voltage 100v to 12ov.

Thank you in advance.

@foolishman

Thanks for posting photos of Accuphase A-80. To convert the mains supply voltage from 100V to 120V, my suggestion is power up the A-80 with 100V mains,

• Use an AC voltmeter to measure the voltage between the yellow/brown and red/blue wire connector tap on the Faston connector block, you should get a reading of 100VAC,
• measure the voltage between yellow/brown and orange wire tap on the Faston connector block with a AC voltage meter, you should get a reading of 120VAC,
• measure the voltage between yellow/brown and white wire tap on the Faston connector block with a AC voltage meter, you should get a reading of 120VAC.

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173751&parId=6E164E2EDFDD40F6%21120&o=OneUp

If the above measurements are correct, swap the blue wire for the white wire and the red wire for the orange wire to convert the A-80 mains transformer to 120V mains.

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173754&parId=6E164E2EDFDD40F6%21120&o=OneUp

In addition, install a resistor in series to the primary winding of the auxiliary transformer to reduce the output voltage of its secondary winding by 20%.

@imhififan 

Thank you very much for the information you provided. I will try to do accordingly. I will keep you updated.

Thank you very much again.

@foolishman 

Just wanted to let you know that I don't have any experience with A-80 voltage conversion, I'm just making recommendations based on photos and previous experience converting Accuphase amplifiers. I highly recommend using DBT to power up the A-80 after conversion.

Please keep me updated, thanks.

@imhififan 

Thank you very much for additional comments. I will surely use DBT after conversion.