Pioneer SA-1270 Voltage Line Selector

[electronhick]

Does anyone know how to jumper the voltage line selector for the Pioneer SA-1270 for 120V? I have the schematic and have tried a few different ways, but cannot get it to work properly. This is a radial type switch different than the older ones used on the SX series. I am missing the part that rotates and makes the internal connections.The switch part number is AKX-507. The power transformer is ATS 1028.

 

[markthefixer]

we got into that a while back, on the A-9.pioneer did it the same pretty much across the board...

this thread:
https://audiokarma.org/forums/index.php?threads/repair-pioneer-a9-nsa.1000302/

page 22 of the thread, near the end:
https://audiokarma.org/forums/index.php?threads/repair-pioneer-a9-nsa.1000302/page-22

the post these drawings are in:
https://audiokarma.org/forums/index.php?threads/repair-pioneer-a9-nsa.1000302/page-22#post-16290940

You have enough info on your pdf to interpolate this to it:

To thumbnail it, basically you are choosing 110 or 120 volts for the PAIR of primaries,
for 110 volts: (in at 10, out at 120 for one primary and in at 0, out at 110 for for the other primary)
for 120 volts: (in at 0, out at 120 for one primary and in at 0, out at 120 for for the other primary)
then
connecting that pair in parallel for two 110/120 windings
OR
connecting that pair in series for one 220 / 240 winding.

and a representation of the plug

 

[electronhick]

Thank you !