Re: WGK6100 Retrace lines wont go away

Just exactly what are you using for a brightness control?

Typically you won't see retrace lines unless there's too much voltage on
grid 2 of the CRT. Another name for grid 2 is "screen", and the screen
control is usually on the flyback. There will be two pots there, the
one closest to the circuit board is the "screen" adjustment and the one
closest to the high voltage wire is the focus. If there's only one pot
there, the screen control might be on the neck board (older monitors).

You said varying the "brightness" caused the picture to change size?
That happens when the high voltage changes voltage. That's why I asked
just what you were turning. If you were turning a pot on the high
voltage supply board itself YOU SHOULDN'T HAVE. If you did, the only
sure way of getting it set right is with a high voltage probe.

> Randy Bissett wrote:
>
> Greetings all. I have been lurking here for quite awhile, putting all
> the good tidbits of Vector knowledge to good use.
>
> Today I got ambitious and started testing a few HV units for my
> WGK6100. Most were dead & will need further investigation, but one was
> an odd problem.
>
> No matter how much I adjust the brightness, the retrace lines will not
> go away. Adjusting the brightness only seems to shrink and enlarge the
> picture. If I turn the brightness all the way down, it shows a normal
> picture for about a half a second then it grows very birght and the
> retrace lines appear.
>
> I capped the HV board with a kit from Bob Roberts, but still the same
> symptoms.
>
> Any help would be greatly appreciated
>
> Thank you
> Randy

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Received on Mon Dec 31 16:50:15 2001