Date   : Thu, 30 Apr 2009 18:28:41 +0100
From   : bbcmailinglist@... (Ian Wolstenholme)
Subject: Microvitec Cub Monitor Adjustments

I've been trying to adjust the two Cub monitors I have connected to
Stations 200 & 201.  Station 200's monitor gave up the ghost a while back,
just giving an unsteady picture flickering to the left and right.  I managed
to fix this with the help of the service manual which told me which thing
inside to adjust and it's now back.

Whilst I was inside fiddling about I also altered the focus which resulted
in a much sharper picture.

However, I've noticed today that the focus has drifted back to how it was
before.  It's not bad, but it's nowhere near as good as it was last night
when I twiddled the focus knob inside.

Is this something to do with the monitor warming up or can I find a
permanent solution?

With the other monitor, the focus has always been very bad and there is
some colour blurring.  Text leaves a blue shadow to the left of characters
on the screen.  It's all right in the very middle of the picture, but very 
noticeable around the four edges of the screen.  I couldn't find anything
in the service manual which appeared to address this and I've tried twiddling
with the little holes marked R, G & B (of which there appear to be about 7)
on the board fixed to the back of the tube, but these just seem to affect
the overall colour.

Although I've improved the sharpness a bit with the focus control, it's still
pretty bad and is practically unreadable in mode 0.  Can I do anything to
improve this?

Best wishes,


Ian