Re: G08 offset problem

Have you made sure you can achieve 0v on Pin3 of IC600? Somewhere during the
adjustment of R712 the voltage on Pin3 should go from + to -. If this doesn't
happen be sure there is +8 and -8 (or -9? it's hard to tell on my schematic) on
both sides of R712. If this is good then R712, R700 or R710 could be at fault.
If the voltages are off, you'll have to trace them back.

But I don't know what you've already tried.

-Zonn

On Thu, 26 Jun 2003 14:30:59 -0500, Tom McClintock <tomm@mgcap.com> wrote:

>Sadly, I'm still having a problem with a G08 deflection board.
>
>The image on-screen will not 'center' and is not adjustable more than
>3/4ths of the way across the screen.
>
>Here are some screen shots:
>http://www.ionpool.net/g08_1.jpg
>http://www.ionpool.net/g08_2.jpg
>
>The tube, yoke, HV and deflection transistors are all known good as I
>can swap in a good deflection board and all works. I'm currently using
>an input signal from a Wico pattern generator so that is not an issue
>either. I've had some really good advice thus far, but still no love.
>
>Suggestions?
>
>
>
>tom
>
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Received on Thu Jun 26 16:37:33 2003