Re: [arcade] rotating monitors frequently (fwd)

Monitors are affected by magnetic fields, so is there an isolation
transformer near the monitor when you are turning it? Is there a speaker?
etc...
The fact that if the power is off, you have no problem is a clue to look at
what the monitor is near as it is rotated while powered. Also the earth's
magnetic field might have a small affect, but the degaussing should deal
with it. Note that when monitors are converged that it is recommended that
it be turned facing north or south..sometimes east or west, but it should
not be at an angle to the field.

John :-#)#

At 02:08 PM 7/14/99 -0400, saint wrote:
>I'd like to summarize the gist of this thread for my FAQ to answer some
>questions a few people have had. Does anyone object to my paraphrasing
>and/or quoting them? Please let me know.
>
>--- saint
> Build Your Own Arcade Controls FAQ
> http://www.arcadecontrols.speedhost.com
>
>
>On Wed, 14 Jul 1999, Mark Jenison wrote:
>
> > On Jul 13, 11:25pm, Jeff Anderson wrote:
> > > Subject: Re: [arcade] rotating monitors frequently (fwd)
> > > >
> > > > You'll see my version of a raster cabinet with a easily rotatable
> monitor
> > :-).
> > > > It's a 25" monitor. If the game has been off for a good amount of time
> > (maybe
> > > > 20+ minutes), I can rotate the monitor in any direction, and the colors
> > will be
> > > > fine.
> > > >
> > > > However, if I go from playing a Horizontal game to a vertical game,
> as I
> > turn
> > > > the monitor, the colors will change. By using a degausing coil, I
> can fix
> > 90%
> > > > of the monitors color in about 15 seconds, but for some reason the
> upper
> > right
> > > > corner (which would be the lower right corner in horizontal mode)
> remains
> > > > unchanged :-\. Of course, if I turn the game off and turn it on a few
> > hours
> > > > later, the corner color is fine again.
> > >
> > > There is a really easy way around the problem of having to wait for a
> > > monitor to "straighten itself out" by letting it sit for a while.. The
> > > reason you have to wait is because the PTC is cooling down. Just short it
> > > out and put a switch inline with the degaussing coil (DGC). Whenever you
> > > want to DG just press the button for about 3 seconds.
> >
> > Way ahead of you. Already did that.
> >
> > > DGing doesn't hurt
> > > the monitor, just dont hold the button down for a few minutes or you may
> > > see smoke.
> >
> > Did that too :-)
> >
> > > the PTC (positive Temperature coefficient) is basically a resistor that
> > > limits current flow when it heats up. When the monitor is cold the PTC
> > > passes current to the DGC, and after a few seconds it heats up and cuts
> > > the current off. It will "trickle" enough to keep it warm (and thus the
> > > DGC off) whenever the monitor is on. it usually takes at least 10 min
> > > for the PTC to cool off enought to do a complete DG. The PTC is that
> > > little black box with 3 pins on the monitor chassis, usually right
> next to
> > > the DGC connector..
> >
> > While this is all nifty in theory, the monitors built-in degaussing
> coil is no
> > where near as strong as the hand ones. Doing what you expressed above
> does not
> > fix the colors in my situation, even my original intention was exactly
> what you
> > stated above. I didn't want to have to get the hand one, but it was
> necessary
> > in my case.
> >
> > ----------------------------------------------------------------------
> > Mark Jenison E-mail address: jenison@cig.mot.com
> > Cellular Infrastructure Group Motorola--Arlington Heights, IL
> > ----------------------------------------------------------------------
> >
> >
> >
> >
> >

  John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
  Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
  http://www.flippers.com
         "Old pinballers never die, they just flip out."
Received on Wed Jul 14 16:51:29 1999