Need Help Adjusting IIgs AppleColor RGB

[dog_cow@macgui.com (D Finnigan)]

The saga continues. Yay.

I replaced a blown transistor with an ECG290 a few hours ago. This fixed the
all-red screen problem. When I attached a IIgs, the screen looked fine,
except that there was no red.

I took the case off of the monitor to fiddle with the controls for R Drive,
R Cut-Off, B Drive, B Cut-Off, and G Cut-Off.

After an hour or so of fiddling, I came to this disturbing conclusion: there
was no way to accurately "mix" the red into the blue and green levels.
Either there was too much red (where black == red), or there was not enough
red.

So, I seek two things:

1.) A comprehensive guide to adjusting the color on the AppleColor RGB
monitor.

2.) Advice on whether this color issue is from the new transistor, and
whether I should replace more transistors for the other color circuits.

-- 
]DF$
Mac GUI Vault - A source for retro Apple II and
Macintosh computing.
http://macgui.com/vault/