Help needed with a "19 Zenith 9-291 chassis (SB1923W Space Command set, 1985 build)

[>QUAD<]

I'd understand if that would have been a bit of overscan, but the picture here is stretched by at least %15 or so...
Here is a pic of the set working, (if anyone is from the Toronto area you would
recognize this channel, it's the local CP24 station),
The weather on the top right should actually be 5 days, and the top right should display the current temp as well
so the temp and one of the days are fully off of the screen,
You can also see that the text in the report on the bottom left is cut as well.

Zeno,
The STR regulator is an STR380, so would that be an 80V regulator?
I've measured 123V, 124V and 148.5V on each of it's connections
(I couldn't find the regulator's diagram to tell which pin is which,
but looking at the circuit I believe I understand the input & output).
So far it looks like the output from the regulator is the 123V, going to a sand block resistor after which I get the 116V reading,
the line then departs from the PS board and going to the horiz. board on the right of the chassis.