Re: Apple IIe TV output quality

[Kevin <kevin@hackaday.com>]

On Saturday, December 29, 2012 1:41:36 PM UTC-6, Cyril Thibout wrote:
> Le samedi 29 décembre 2012 20:30:56 UTC+1, Cyril Thibout a écrit :
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> > Hi
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> > I just purchased an Apple IIe (rev B, PAL, 80col card) on ebay and tried to connect it on a flat TV composite input.
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> > Wile in Hires the image is perfect, in text mode the background is greenish with parasites. in 80 col mode I can barely read the characters.
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> > Is that normal? Should I use an old TV (non flat) ? 
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> > I must add that on the green monochrom monitor the text mode is perfect in 40 col mode. in 80 col mode on the monitor the characters are somewhow truncated.
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> > Should I check some components?
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> > any idea please?
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> > thanks
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> > cyril
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> I must add that in 80 col mode what I mean by 'unreadable characters' is that the last column for each character is missing. This problem doesn't occur in 40 col mode

tv's usually SUCK due to input bandwidth, but the characters should not be missing any column on a monochrome screen and there may be something fishy with the 80 column card. First thing to do is visually inspect the card and look for any obvious defects (broken traces, loose pads, bubbling silk screen, burned components, growth etc)