Jonathan & Rodger
Rodger is right. The magnetic field generated by the internal degaussing coil
is nothing compared to an external degaussing coil. As a matter of fact there
are different grades of external degaussing coils. The smaller ones for example
will have little effect on large crt's such as a 35" (not that you'll find them
in any 80's games)
I had said you should try external degaussing first. But you also said the
image wasn't straight which is the YOKE, so it will need to be adjusted.
Steve
Rodger Boots wrote:
> Jonathan Stanley wrote:
>
> >Degaussing Help?
> >Can anybody help me figure out why my degaussing circuit isn't
> >working? I do not hear or see any degaussing when I first power up
> >the game, and in fact the right side of the screen (upper and lower
> >corners) clearly needs to be degaussed. I read about a Posistor
> >(a.k.a. Thermistor?) at R74 on the deflection board. Should I
> >replace that first or look elsewhere?
> >
>
> First you have to figure out if the degaussing coil is the problem or if
> it's something else, like yoke settings. The easiest way to do that is
> try degaussing with an external degaussing coil or anything else with a
> large AC magnetic field like a soldering gun, bulk tape eraser, or even
> the field from the motor of a hair drier or heat gun.
>
> If external degaussing fixes your problem you can ignore everyone that
> wants you to fiddle with the yoke and concentrate on IF your degaussing
> coil isn't working and why not. I say IF because internal degaussing
> coils aren't always strong enough to get the job done (I learned THAT
> after a nearby lightening strike magnetized about a dozen games---the
> internal coil had no effect but a professional external coil fixed them
> right up).
>
> If the picture is still bad after using an external coil THEN it's time
> to adjust purity. But don't get ahead of yourself, make sure you're
> degaussed first.
>
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Received on Sun Mar 23 06:08:54 2003
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