Voltage conversion of Accuphase E-5000

@imhififan

Thank you very much for providing information. Before receiving your message, I have done modification of circuit of the auxiliary transformer. Actually, a person with electronic and soldering skill has done.

According to him,  he inserted a resister : 2000 Ohm/2.5W (10kOhm/0.5W x 5 parallel) in series to the fuse and confirmed that the voltage at the DC plus line is 20% less from the original circuitry while power SW is ON.

Do you think it is OK?

@foolishman

Although U.S. mains voltage is rated at 120VAC ± 5%, in some cases household outlets may have voltages as low as 104VAC.

My suggestion would be to power the amplifier with a variac set to 104VAC and see what the highest resistance in series is allowed to turn the amplifier on, if 2kΩ works then it's no problem.

@imhififan

Thank you very much for your quick response. I turned the amplifier on with nearly 100VAC and confirmed 2kΩ works.

I have successfully converted the E-700 from 100v to 120v thanks to your great help. Thank you very much again.

Meanwhile, also I have started discussions about voltage conversion of the E-4000 and the DP-450. I will appreciate very much if you would post information on them. I am ready to post some pictures of the power supply board.

Thank you very much in advance.

I have successfully converted the E-700 from 100v to 120v

Great! You're most welcome, glad I could help.

I turned the amplifier on with nearly 100VAC and confirmed 2kΩ works... Meanwhile, also I have started discussions about voltage conversion of the E-4000 and the DP-450.

You can use the same method to convert the E-4000 and E-5000 from 100V to 120V.

BTW, if you could post some pictures of the DP-450, maybe we could figure out how to do the voltage conversion.

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@imhififan

Thank you very much for information on the E-4000 and E-5000. I will let you know if I successfully convert them from 100v to 120v.

Here are some pictures of DP-450:

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173337&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173335&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173336&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173338&parId=6E164E2EDFDD40F6%21120&o=OneUp

I will appreciate very much if you would provide information on voltage conversion from 100v to 120v.

Thank you in advance.