Re: Color kill problem?

["Chris Alaimo" <cpalaimo@gmail.com>]

Linards Ticmanis wrote:
> Give us a bit more information please.
>
> Is this a NTSC or PAL (Europlus) machine? I assume NTSC, right? If PAL,
> the solution for wrong colors is simply to adjust the two pots on the
> PAL color card.

NTSC

>
> Which board revision number?
>

Rev 04

> Is there a chip at the very front right corner of the board?

Front right looking at it from which direction?

> Can you get correct colors by either turning the color trim pot or
> adjusting your monitors hue control?

I can adjust the colors, yes.  But I can not get the right colors to
display.

> Did you try swapping in a new 14.3181818... MHz quartz, the old one
> could have drifted with age. If you do, you might want to connect a
> small ca. 30pF trimmer capacitor in series with it. If your monitor/TV
> is not of 1980s or earlier vintage, you might need to fine-tune the
> Apple's frequency, as some newer TVs are much more picky with regard to
> color carrier frequency.

Where on the board is that located?  And I am using an old Commodore
moitor that works fine with my other Apple ][s.

> Did you try a different monitor, yours might have a too sensitive color
> reception and fail to engage the color killer correctly when in text
> mode. The result of that is usually smeary, glaring, moving color
> fringes as the monitor tries desperately to interpret those miniature
> remains of a color burst. Especially when your Apple has a Rev. 7 or
> earlier main board.

Yes I also tried it with my TV and got the same result.


> Also, did you test your monitor with another Apple, with a VCR, or
> whatever. Maybe that is the culprit rather than the Apple.

Yes, the same monitor works with my ][ (rev 3), other ][+, IIgs, and
//c+. 

Chris