Re: Asteroids no video

    Would the end of the crt glow if it was an HV unit failure?

John Robertson wrote:

> There has been a LOT of discussion on this matter here over the past few
> months. You might want to check the vectorlist archive for more info. The
> diode is getting a bit hard to find, but the HV unit is in the metal cage
> on the left rear of the monitor chassis. You will need schematics and a
> voltmeter to test the voltages coming out of it to see if it is working at
> all. If it is putting out the voltages that are required, then you need to
> find a replacement HV diode...check the archive for more info-extensively
> talked about...
>
> I believe a link to the archive can be found at http://www/spies.com/arcade
>
> John :-#)#
>
> At 07:38 AM 27-12-00, Dan Piraino wrote:
> >I havnt had too much experience fixing HV failures, actually I havnt had
> >any. I
> >have only worked on circuit boards for the game. HV is located on the left or
> >right side of the monitor chassis? I am thinking left. Can this HV diode be
> >found anywhere else besides in a 70's B&W TV set.? Thats not something
> >easy for
> >me to find. Is it something that is not made anymore.?
> >
> > Dan Piraino
> >
> >John Robertson wrote:
> >
> > > That sounds like a HV failure. Often the HV diode. Condensation forming on
> > > the HV lead might have drawn to much current through it. I would have to
> > > wonder if this is the customers fault. After all you should NEVER plug in a
> > > electrical device after it has been outside in the cold until it has warmed
> > > up to ambient room temperature. Did the customer plug it in as soon as it
> > > was brought in? There is the problem. The solution is to find out if the HV
> > > cage is producing secondary voltages (400VDC and 90VDC come to mind) and if
> > > so, then you need a new HV diode. If you find a B&W TV from the 70's it
> > > should have this diode in it ready to be stolen and used in the game...
> > >
> > > John :-#)#
> > >
> > > At 04:09 AM 27-12-00, Dan Piraino wrote:
> > > > I sold a game to a customer and after keeping it outside in his
> > > >cold garage for three weeks he brings it in his house to play with it.
> > > >It works fine for 20 games then the objects on the screen get really big
> > > >and then the video goes out. There is game play and sound but no video.
> > > >I believe something shorted in the board ,but what.
> > > >Thanks,
> > > > Dan Piraino
> > > >
> > > >-----------------------------------------------------------------------
> > ----
> > > >** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE"
> > in the
> > > >** message body to vectorlist-request@synthcom.com. Please direct other
> > > >** questions, comments, or problems to neil@synthcom.com.
> > >
> > > ---------------------------------------------------------------------------
> > > ** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
> > > ** message body to vectorlist-request@synthcom.com. Please direct other
> > > ** questions, comments, or problems to neil@synthcom.com.
> >
> >---------------------------------------------------------------------------
> >** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
> >** message body to vectorlist-request@synthcom.com. Please direct other
> >** questions, comments, or problems to neil@synthcom.com.
>
> ---------------------------------------------------------------------------
> ** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
> ** message body to vectorlist-request@synthcom.com. Please direct other
> ** questions, comments, or problems to neil@synthcom.com.

---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to neil@synthcom.com.
Received on Tue Dec 26 17:53:37 2000