What does EW correction stand for?

East-West correction, part of the deflection circuitry.

East-West, IOW the left and right sides of the screen. AKA pincushion. Basically, EW correction is the geometry setting which makes the sides of the screen straight instead of bowed in or out.

Dave

Maybe it's a European thing (E-W Correction), while we here in the US call it Pincushion correction. They call a Flyback a LOPT (Line Out Put Transformer) too. Same thing different name ??

trouble is LOPT is also (Line Out Put Transistor)

It may of started many years ago when the FBT was driven by valves (little tubular things that light up with internal heaters)

But now you don't know if they are talking about LOPT or LOPT, I made the switch many years ago from LOPT & LOPT to FBT & HOT not so confusing, my guess is some people are just plain ignorant.