I quote from Curt Palme's CRT FAQ since I'm not familiar with the sonys that much:
"Between 1986 and 1996 Sony came out with a number of their 10XX series, including the VPH-1020, 2020, 1030, 1031, 1040, 1041, 1042, 1044, 1000, and 1001. With the exception of the 1030 and 1031, these were all video grade sets, had analog convergence and had slight variations between the models. Some had S-video inputs, some had slightly brighter tubes, etc. etc. All very reliable sets, small footprint, and most had 2 or 3 small cooling fans in them. 600 to 750 lumens. In general, the higher the model number, the newer it was, but that changed with the introduction of the 1000 and 1001 in about 1995. I have no idea why Sony changed their numbering sequence...All of the above sets used Sony 7” ES focus tubes.
"
So it sounds like it's video-grade only, so you are limited to 480i. You can't get progressive scan on this unit if that's the case, and you would need to be connected via something more than s-video, mostly RGB on CRT FP units, if it were a data-grade model that could handle higher resolutions.
Consult the CRT forum at avs, and Curt's excellent CRT FAQ:
http://www.curtpalme.com/6901.html