Re: Tech: G08 Color Controls

See my FAQs:
http://www.enteract.com/~jenison/mars

Offhand:

1) Check to see the 4-pin connector going to the boardset is on
correctly. If it's reverse and not keyed, you may get this result
2) Check the solder points on the interface board; bad parts here can
cause loss of colors

On Thu, 24 Jan 2002, Tim Tewalt wrote:

> First time at resurrecting a Sega G80 (Star Trek) so please
> bear with me... I just finished rebuilding the monitor and
> see only blue traces.
>
> What are the functions of the "cutoff" pots for red and green
> on the neckboard? I futzed with both the "cutoff" and "gain"
> pots a bit, but didn't get the other colors. I didn't touch
> up the solder joints on these pots yet, but they look good.
>
> Where is pin one on the little input driver board on the back
> of the monitor? Plugging it in one way (what I thought was the
> correct way) I could read the STAR TREK logo (in blue). Plugging
> it in what I presumed to be the wrong way showed a multicolored
> indeterminable mess around the center section of the screen.
>
> I'm thinking the next step will be to go into selftest mode, test
> 6 (screen test) and measure the input levels from the xy control
> board.
>
> Any hints or tips would be appreciated. I think I'll stay
> after work tonight and see if I can finish it up.
>
> Thanks,
>
> Tim
>
>
>
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-- 
Mark Jenison
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