Convert Accuphase C27 from 100V to 120V


Hello,
I own an Accuphase C27 Phono Preamp and would like to convert the voltage to 120V. Removing the cover reveals the following wire configuration:

Black to Black

Brown to Brown

Yellow to Yellow

White to White

Pictures can be found by clicking the link below:

Jumper Wire Configuration

Any knowledge or advice would be greatly appreciated. Thank you so much for your time and happy holidays.

jmicpilars

Based on the image, I believe the white and blue wire that soldered to the connector block is incoming AC voltage.

1. Power up the C27 with 100VAC, use a DMM to to measure the voltage across the white and blue wire you should get 100VAC.

2. Measure the voltage across white and yellow wires and you should get a reading of 115VAC to 120VAC.

3. If you confirm the above reading are correct, swap the yellow and brown wire on both side of the connector block, so both yellow wires are connected to the blue wire.

4. Done. Voltage conversion from 100VAC to 120VAC is completed.

 

 

Imhififan1,

You're the hi-fi man! Thank you so much! I am going to do this tomorrow and report back here.

Best!