Quick question - does anyone know what main chassis is in a Zenith SM 2535X7?

[RetroHacker]

I have the service manual here somewhere but I can't find it at the moment. Is there a cross reference guide or a list of which modules go in which sets? Trying to figure out which sweep/HV module this uses without hauling it out from the wall and disconnecting a thousand things and taking it apart.

This is a System 3 25" console with onscreen display and ultrasonic remote.

-Ian