So I found a shorted diode d708 replaced it and r402 caught on fire? This thing keeps getting worst instead of better anyone?
D708 damper diode
will cause image to be to wide
anytime the width is to wide
it has something to do with
the horiz-output circuit.
the HV caps change their value over time
and when to far out it will short the damper diode
because its in series with another diode it doesn't cause
damage to the B+ or HOT.
When the HV caps open it would cause the image
to be narrow and still have HV.as well as the drive circuits.
So you should replace c724 the HV S-cap
As you know the r402 feeds the vertical ic.
and can damage d302 and r303 in some case's.
when the ic kills the 27v supply voltage.
you can still have HV and no vertical deflection
so if you desolder the ic and replace the resistor
you will know what is causing the resistor to open.
Even if you had vertical deflection the ic draws
alot of current and should be replace at least once in its
chassis life,its on the second largest heatsink in any chassis.
Also check for any solder bridges in case you made some
in and around the path to the vertical which could kill any voltages
to the ic.
The bdx trans is for pincushion circuit see picture
it shapes the edges and corners but when the image is to wide
it has nothing to do with that part,the image could be like picture
or narrow image. if the bdx is out of circuit or not working.
C729 is for the pincushion circuit after you fix the width
remove it or the bdx and see how the picture looks
it won't be to wide.sorry im not to good at one liners
and if i explained it good enough.
Let us know how it works out for you