At 17:47 -0800 3/15/05, bob gary wrote:
>I'm wondering about my SE30's screen that has a
>slightly  off-kilter screen shape---not square. I've
>been told that you can tweak the shape with some
>controls inside like a TV, but I don't want to even
>think about getting near that monitor tube with the
>power on and the case off.

Don't be so afraid.  The controls are on the outside face of the power supply 
board. You should use a plastic or ceramic tool not so much for insulation but 
to prevent interference caused by the magnetic blade of a steel screwdriver.

Don't reach under the high voltage wire going into the side of the picture tube 
and you'll be OK. Keeping one hand in your pocket is a long-standing precaution 
for work with vacuum tubes but it's hardly necessary in a Classic Mac. The idea 
is to prevent an accidental charge from passing through your chest on the way 
from one hand to the other.

And the voltage in a black and white SE/30 is no where near the voltage in a 
color TV set.

But then I don't remember a pincushion distortion control in an SE/30 and you 
may have a bad component rather than a bad adjustment.


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