Asteroids Deluxe with WG19V2000 problems

 I will have to check schematics... not pin 9&10 on the 12 pin
connector... let me look at schematics... I shorted pins 9&10 (filament)
on the 10-pin connector of the deflection board. This blew out the two 3.3
ohm resistors in parallel. I replaced those and everything seemed fine.
Could this have damaged something else on the main board?

 Thanks again,
   Josh
> ----- Original Message -----
> From: Josh Wirth <jwirth@gru.net>
> To: <vectorlist@lists.cc.utexas.edu>
> Sent: Thursday, December 09, 1999 12:16 PM
> Subject: Re: Asteroids Deluxe with WG19V2000 problems
>
>
> > If I turn down the brightness to the point where the white dot is gone,
I
> > see only the dot intersections. If I turn it up to the point where the
> > expected lines are visible, I see the retrace lines, also. I am
thinking
> > that maybe the HV cage and the tube are fine (I swapped out another
tube.)
> > I am going to borrow an oscilloscope and check the signal coming off. I
> am
> > assuming the the best place to check this is on the Z OUT tab. My
> schematic
> > shows pin M on the edge connector as Z OUT but I have placed it on K(?).
> I
> > shorted pins 9&10 on the 12 pin connector at one time and blew the two
3.3
> > ohm resistors there (I am not looking at the board.) Could this have
> hosed
> > something else down the line?
> > ----- Original Message -----
> > From: Joel Rosenzweig <Joel_Rosenzweig@Agilent.com>
> > To: <vectorlist@lists.cc.utexas.edu>
> > Sent: Thursday, December 09, 1999 9:39 AM
> > Subject: Re: Asteroids Deluxe with WG19V2000 problems
> >
> >
> > > >I seem to be getting the Z-out signal pulsing... what is the best
way
> to
> > > >check? I used a volt-meter and it seems to be pulsing. (It is
hanging
> > >
> > >
> > > The best way is to use an oscilloscope to look at the waveform.
You'll
> > see
> > > the signal swing from ground to +5V. The use of a multimeter is OK,
but
> > not
> > > as good since you can't verify that the signal is swinging from end to
> > end.
> > > But, as long as you read neither +5V nor 0V, that means that your
signal
> > is
> > > most likely fluctuating.
> > >
> > > >around 1.6 V but moving.) Could something on the deflector board be
> > > hosing?
> > > >High voltage? Thanks.
> > >
> > >
> > > Do you see the other retrace lines, or does the display look normal
> except
> > > for "the white dot?" Did you mean this was one white dot in the
center
> of
> > > the screen, or do you see white dots all over the screen where vectors
> > > intersect? If you are seeing white dots all over the screen, you may
> just
> > > have a contrast/intensity adjustment to make.
> > >
> > > Joel-
> > >
> > >
> > > >----- Original Message -----
> > >
From: Joel Rosenzweig <Joel_Rosenzweig@Agilent.com>
> > > >To: <vectorlist@lists.cc.utexas.edu>
> > > >Sent: Wednesday, December 08, 1999 3:12 PM
> > > >Subject: Re: Asteroids Deluxe with WG19V2000 problems
> > > >
> > > >
> > > >> You might verify that the Z-out signal from the game board is
> actually
> > > >> changing state. The monitor might be completely fine, but if the
> game
> > is
> > > >> not triggering the blanking circuit, you'll get video as you
> describe.
> > I
> > > >> don't remember if the Z-out is positive or negative logic, but
either
> > > way,
> > > >> if it's stuck in one state, that's no good.
> > > >>
> > > >> Joel-
> > > >>
> > > >>
> > > >> -----Original Message-----
> > > >> From: Josh Wirth <jwirth@gru.net>
> > > >> To: vectorlist@lists.cc.utexas.edu <vectorlist@lists.cc.utexas.edu>
> > > >> Date: Wednesday, December 08, 1999 3:01 PM
> > > >> Subject: Asteroids Deluxe with WG19V2000 problems
> > > >>
> > > >>
> > > >> >Hey all... long time since I have been here (although I never
said
> > much
> > > >> >before anyway...)
> > > >> >
> > > >> >I have an AD with WG monitor and I cannot get the white-dot to
> > disappear
> > > >> >unless the vectors are nearly invisible themselves. I have it at
a
> > > point
> > > >> >where the intersection of vectors is clearly visible but the
vectors
> > > >pretty
> > > >> >dim. I have the HV adjusted so the proper voltages are on Q900.
> The
> > > >> >deflection board seems to work just fine. There is very little
> > burn-in
> > > >on
> > > >> >the monitor (so I am guessing the tube is probably OK.) Any clues
> as
> > to
> > > >> >what I might need to do to get this thing up? Should I change the
> > high
> > > >> >voltage rectifier coming out of the flyback? If so, the
schematics
> > list
> > > >it
> > > >> >as a H1809... something I haven't been able to cross-reference.
> Could
> > > >> there
> > > >> >be a problem with the vector generator on the main board? Any
help
> > > would
> > > >> be
> > > >> >greatly appreciated.
> > > >> >
> > > >> >Thanks,
> > > >> > Josh
> > > >> >
> > > >> >
> > > >>
> > > >
> > > >
> > >
> >
>
Received on Thu Dec 9 12:42:11 1999