Re: Tempest video problem

Interesting - I was wondering if it was the board, not the monitor. No, I
haven't tried either the boardset or the monitor in another game - he lives a
distance away and I didn't know about the problem before visiting him. Thanks
for the info. I'll pull out the schematics and take a look.

Rich

"Ozdemir, Steven S, GOVMK" wrote:

> G'day folks,
>
> I remember fixing a problem just like this on a Tempest cocktail. It was
> the MC chip (not the LF chip) in the Tempest PCB AVG...sorry for the vague
> references. I don't have access to any documentation while I'm writing this
> email.
>
> Have you checked the monitor in another game? That'd be the clencher.
>
> Steve Ozdemir
> sozdemir@att.com
>
> ps - You might want to check the leads going to the MC chip also.
>
> -----Original Message-----
> From: Bret Pehrson [mailto:bret@infowest.com]
> Sent: Thursday, September 07, 2000 9:23 AM
> To: vectorlist@synthcom.com
> Subject: RE: VECTOR: Tempest video problem
>
> > (I asked one of my EE professors about it and the best answer he could
> > provide was that sometimes transistors will have strange and unpredictable
> > behavior when they get old)
>
> Hey, I've seen that same behavior in EE professors! Whoops -- I should have
> posted this to VECTOR.SMARTASSREMARKS -- sorry.
>
> > -----Original Message-----
> > From: owner-vectorlist@synthcom.com
> > [mailto:owner-vectorlist@synthcom.com]On Behalf Of jeff hendrix
> > Sent: Thursday, September 7, 2000 9:34 AM
> > To: 'vectorlist@synthcom.com'
> > Subject: RE: VECTOR: Tempest video problem
> >
> >
> > I had a similar problem on a star wars with a WG in it.
> > It would draw half way up the top half of the screen, then wrap
> > back around
> > to the middle. (the top of the screen ended up back near the center)
> > Replacing the deflection transistor fixed it.
> > (I asked one of my EE professors about it and the best answer he could
> > provide was that sometimes transistors will have strange and unpredictable
> > behavior when they get old)
> >
> > -jeff
> >
> > -----Original Message-----
> > From: Rich Gopstein [mailto:gopstein@pluto.njcc.com]
> > Sent: Wednesday, September 06, 2000 7:32 PM
> > To: vectorlist@synthcom.com
> > Subject: VECTOR: Tempest video problem
> >
> >
> > I have a friend with a Tempest which has a strange video problem. The
> > monitor is a WG6101. The image is missing from the left side of the
> > monitor (actually the upper half of the un-rotated monitor). The strange
> > part is that instead of the normal deflection transistor problem, the
> > missing left half is folded over on top of the right half. The vectors
> > themselves look normal except for the folding problem... Any ideas?
> > Thanks.
> >
> > Rich
> >
> >
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Received on Fri Sep 8 07:56:49 2000