Hi to all,
@Matt, Thanks! and it's not quite finished yet.
For the lazy guys among us who don't have time to roam around the full size scans on Etype2's site with a magnifying glass, here are zoomed illustrations of Sony's 19C-90 in the Japanese 1967 Color TV book.
The Chromatron Noriyoshi is repairing 19C-100 has virtually the same circuitry, but in a tabletop cabinet.
The Chromatron displayed at the Sony Museum in Tokyo is referenced 19C-70 but the schematics book shows model 19C-90.
Their appearance seems totally identical. Anyway, all used the 480AB22 48cm screen diagonal Chromatron CRT.
It is interesting to observe how fast Sony progressed after the three first models (1964-1967) as the all-transistorized* KV-7010U Chromatron with an 8" screen came out in early 1968.
*except for two EHT rectifier tubes.
see E-type2's site:
http://www.visions4.net/journal/chromatron
Best Regards
jhalphen
Paris/France