Do you think both 100V and 120V are the same wiring?No. imhififan, do you have any reasons that looks like wired to 120V?I was just guessing. Maybe the A-48 just changed one set of primary winding color of wires (orange-red-gray) only, and kept the second set primary winding (yellow-brown-white) unchanged. https://upload.review33.com/avforum/201701/201701260134465700.jpg Measuring DC resistance will give you the definite answer. |
correct observation imhififan, Accus have different wiring colors, despite generic schematic is the same. not sure about resistance, using power VARIAC transformer starting with 0V AC and measuring major operational voltages (for example large cap banks) is the most reliable way to make sure no damage if wiring change is wrong. |
1=white+orange 2= red 3= blue 4= black+yellow 5= brown 6=noneTo measure DC resistance, you need to pull out all transformer primary winding wires from the quick connect terminals, make sure all wires not touching each others, using a DMM to measure the following resistance: white - orange = ? ohm white - red = ? ohm white - blue = ? ohm white - black = ? ohm white - yellow = ? ohm white - brown = ? ohm orange - red = ? ohm orange - blue = ? ohm orange - black = ? ohm orange - yellow = ? ohm orange - brown = ? ohm black - red = ? ohm black - blue = ? ohm black - yellow = ? ohm black - brown = ? ohm yellow - red = ? ohm yellow - blue = ? ohm yellow - brown = ? ohm Please report back the result and see if we can figure out which wires belong to the two sets of primary winding. Below is the pictures of A-46 wiring: https://img.canuckaudiomart.com/uploads/large/466882-1b7bea05-accuphase_a46_class_a_power_amplifier.... https://img.canuckaudiomart.com/uploads/large/466883-52355904-accuphase_a46_class_a_power_amplifier.... |
