I've never seen this before, and was wondering why they might do this? The positive rail is fairly conventional, feeding both the positive output and driver. But the negative rail provides a different voltage for the driver than the output trans. Can anyone tell me why they might do this? Just seems odd.
Here's a simplified drawing of the relevant PS circuit, and then the full schematic if anyone wants to see it.
Thanks all;
Artie
Edit: Whats especially odd, is that it requires a special transformer, (not cheap), that provides an extra "tap".
And here's a link to the full schematic if you want to see it: Yamaha CA-400 (It's fairly large.)
Here's a simplified drawing of the relevant PS circuit, and then the full schematic if anyone wants to see it.
Thanks all;
Artie
Edit: Whats especially odd, is that it requires a special transformer, (not cheap), that provides an extra "tap".
And here's a link to the full schematic if you want to see it: Yamaha CA-400 (It's fairly large.)
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