Taking apart a Brikon 723 floppy drive analyzer

[Tony Duell]

> There appear to be (7) terminals on each transformer.  Maybe +,-,GND on 
> the primary AC side, and then (4) terminals on the secondary DC side?? I 
> guess all (4) terminals would be the same voltage?

It would be more common to have 4 primary (mains) side terminals and 3 
secondary terminals. There would be 2 115V primary windings which can be 
connected in parallel for 115V mains or series for 230V mains and a 
centre-tapped secondary that can be used witha couple of diodes as a 
full-wave rectifier.

If there are 3 terminals on the mains side, it's possible one is an 
inter-winding screen (sheild) and is connected to ground. 4 secondary 
terminals would suggest 2 separate windings (which may or may not be the 
same voltage).

-tony