Resources
There is practically no information about Taxan KG-12N monitor on the Internet. It was manufactured around 1984 by TSK Electronics in the US or Kaga Electronics in Japan, whose website today is named Taxan.
Documents
Internals
Motherboard
CRT
Power Supply Transformer
Controls
Reassembly
I have one of these 12” monitors, a Taxan KG-12NU-YN. Mine is Amber monochrome. I bought it new, in March 1984, in Alexandria VA. Used it as a display for an Apple II Plus. Stopped using it around 1993, but still have it.