Re: Re: G07-cbo haziness

I just looked at a G07 and the other red wire is one
labeled BH 180v on the schematics. It originates at
the flyback, goes through a diode (it looks like D503)
and ends up between the drive transistors and the
color guns. It is directly connect to the large
capacitor on the neck board so if you have everything
back in place, I'd start by checking the voltage
across the capacitor to see if it is still 180v. If
not, work backwards. Check the voltage before and
after the diode.

Thanks,
-Chris

--- Dustin Holden <discuspro@yahoo.com> wrote:

> Well, I must have switched the wrong wires. I now
> realize there are two red wires that run to the
> neckboard. When I powered on the monitor there was
> instant smoking on the neckboard. Neckboard
> resistors
> R104 and R107 melted. So, I changed out the
> resistors
> and powered up the monitor. Well nothing came up on
> the screen as it normally did previous to the wire
> switch. There is normal buzzing and there is
> glowing
> at the tube neck when it was showing picture. B+ is
> at 120V. I tried to adjust the brightness but when
> I
> make the screen brighter with the screen adjust dial
> below the focus dial all I see is a whitish screen
> with zig zag lines on it. What did I just do?
>
> It sucks to be a beginner.
>
> -Dustin
>
>
> --- peter jones <highwayman2000@mail.ru> wrote:
>
> >
> >
> > -----Original Message-----
> > From: Dustin Holden <discuspro@yahoo.com>
> > To: rasterlist@vectorlist.org
> > Date: Sat, 12 Jan 2008 00:40:40 -0800 (PST)
> > Subject: RASTER: G07-cbo haziness
> >
> > >
> > > Having trouble trying to get the color right on
> > my
> > > g07. I changed out the three video output
> > transistors
> > > on the neck board X101, X102 & X103 because I
> > cannot
> > > seem to remove a blue intense haziness on the
> > whole
> > > screen. Cap kit's already been done. Not a
> tube
> > > problem because I tried on other tubes. Not a
> > game
> > > problem. I can see my games running in the
> > > background. I can see red and most other colors
> > but
> > > they are all drowned out by blue. Where there
> > should
> > > be complete black it is blue. The monitor was
> > shorted
> > > somehow previous to my owning it so it wasn't
> > working.
> > > I replaced the power regulator transistor X02
> and
> > got
> > > the monitor up and running.
> > >
> >
> > it's probably the neckboard,
> >
> > before you do anything else swap the blue & red
> > drive wires going into the neckboard,
> > if it's still all blue you know it's the
> neckboard.
> >
> > next lift & meter all resistors & capacitors in
> the
> > blue circuit on the neckboard.
> >
> >
> >
>
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> > problems to chris@westnet.com
> >
>
>
>
>
>
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Received on Sun Jan 13 22:27:58 2008