Voltage conversion of Accuphase E-5000

@foolishman 

Thanks for posting the E-700 pictures.

To convert the main power transformer primary winding voltage from 100VAC to 120VAC, move connector K1 to K2 and K4 to K5.

However, there is an auxiliary transformer in the upper right corner of your third picture, which supplies power to the standby circuit. It needs to be changed to 120VAC, or use a resistor connected in series to drop 20V so that the existing transformer can be used.

@imhififan

Thank you for providing information. Regarding the auxiliary transformer, I in case the existing transformer is used, how should I use a resister connected in series to drop 20V?

I will appreciate if you would provide more information.

Thank you in advance.

@imhififan

Here are some more pictures for the auxiliary transformer: 

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173324&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173325&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173326&parId=6E164E2EDFDD40F6%21120&o=OneUp

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173327&parId=6E164E2EDFDD40F6%21120&o=OneUp

Thank you in advance.

in case the existing transformer is used, how should I use a resister connected in series to drop 20V?

You can use a 680Ω 3W resistor to replace fuse F1.

https://www.vishay.com/docs/28729/pr010203.pdf

@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?