DEC VR150 CRT Monitor

[Douglas Taylor via cctalk]

I have one of these and would like to get it working correctly, but 
can't find any info on it from the internet.

It has a date code of 1989 and was built in Yokahama Japan, by who I 
don't know.

Does anyone know who DEC had build there CRT monitors back then? Are 
schematics available?

Doug