Tamura GA80071 wiring
« on: April 02, 2008, 02:47:30 PM »
I got some GA80071 input transformers originally from the Yamaha PM1000, which I bought from someone here...  

What's the wiring schematic / diagram for these?  I can't find  wire color code info in the PM1000 schematics.

I get some resistance on some wires: The yellow and white wires show some resistance with each other but no direct connection, and the blue and green wires show some resistance with each other but no direct connection.  All other combinations come up dead on my meter.

Anyone know about the black and brown wires?
Imagine a wet, slightly chilled from its gas release and decompression, with water droplets condensing, sucking surface tension, slowly sliding down the side, capped by a healthy virgin froth on top..


Tamura GA80071 wiring
« Reply #1 on: April 02, 2008, 04:01:18 PM »
Here's how I understand it:

Brown -- Primary Center Tap
Green and Blue -- Primary Leads
Yellow and White -- Secondary Leads (I've seen yellow labeled "cold" and white labeled "hot.")

Black must be an internal shield, but I've can't recall ever seeing it connected in any PM1000 channel I've racked and the black lead has always been cropped short.



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