Re: Problem with Electrohome G07- only half picture

Matt,
Is it in a vertical game?

Matt Rossiter wrote:

> I did pull that resistor out and tested it - it looked good, but I've been
> thinking of replacing it anyway. Would anyone care to explain how the
> vertical output circuit works in just a few words? Why would half the
> screen go out? I would think that I'd just get a flat horizontal line if
> the circuit failed.
>
> thanks for the help.
>
> Matt
>
> ----- Original Message -----
> From: "Sean McLachlan" <sean@lithoflexo.com>
> To: <rasterlist@vectorlist.org>
> Sent: Monday, July 28, 2003 7:54 AM
> Subject: RE: RASTER: Problem with Electrohome G07- only half picture
>
> > You do if the monitor is mounted vertically. ;)
> > I had a G07 that was doing the same thing, and one of the 400 series
> > resistors was burnt open. I don't remember which one, it was so obviously
> > fried I replaced it without much thought. Rogers R420 suggestion rings a
> > bell, though.
> >
> > Sean McLachlan
> > MIS Manager
> > LithoFlexo grafics inc.
> > 801.484.8503
> >
> > -----Original Message-----
> > From: owner-rasterlist@vectorlist.org
> > [mailto:owner-rasterlist@vectorlist.org]On Behalf Of SteveT
> > Sent: Monday, July 28, 2003 8:58 AM
> > To: rasterlist@vectorlist.org
> > Subject: Re: RASTER: Problem with Electrohome G07- only half picture
> >
> >
> > Matt
> > If it displays the right half of the picture top to bottom -you do not
> have
> > a
> > vertical problem.
> >
> > Matt Rossiter wrote:
> >
> > > Hey all,
> > >
> > > I brought home a Centipede that had a dead monitor. I replaced the caps
> > and
> > > installed a new HV unit. It now powers up, but only displays the right
> > half
> > > of the picture with a line running down the middle -looks like a typical
> > xy
> > > failure but on a raster game. So, basically I have a vertical
> deflection
> > > problem.
> > >
> > > Here's what I've done so far...
> > >
> > > 1) Tested the transistors in the vertical output circuit - X401 and
> X402 -
> > > they test fine out of circuit. I believe the signals are good too when
> > > testing in circuit.
> > > 2) FR401 (the fusible resistor) is fine.
> > > 3) Checked the signals on IC 501 and they look good. Swapped in a new
> IC
> > > just to be sure.
> > > 4) Checked other resistors and capacitors within the vertical output
> > > circuit.
> > >
> > > I just can't seem to trace down the problem, but it could be something
> > > simple I'm missing. Has anyone else run into a similar problem?
> > >
> > > Matt
> > >
> >
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Received on Mon Jul 28 19:28:49 2003