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Benzman66

A question about the "6 switch" switchboard.

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Was playing around with a few sixers today and noticed the one switchboard did not produce as sharp of picture as the other switchboards, This was after I tried the "problem" switchboard on the other 5 "brains". Adjusting the RF box of course sharpens it a little, but too much blurs it. Does anyone know if any of the other components near the RF box could make a difference or not in producing a better/sharper picture? Thanks.

 

P.S. I already know about the RF cords, 7805 regulators, etc.

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With my extremely limited Atari tech experience stipulated, I've never seen two RF modulators that produced the same signal. RF being a dark art and all, maybe that one is just a little "off" in one or more possible infinite combination of factors. :?

Edited by tetrode kink

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Well, the issue seems to be only with that certain switchboard, not the actual units. I was wondering more if it had anything to do with the caps/resistors? that are mounted on the piece extending from the rf box or the ones that are on the switchboard under the right difficulty switch.

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I would change out both of the electrolytic capacitors on the switch board. Also, Atari had quality control problems with some glass-bodied capacitors, but I don't know if any of those were installed in six-switchers. Without magnification, they look almost exactly like a small-signal diode, but without a stripe to denote the cathode, and of course the silkscreen legend on the board will identify them as "C###" instead of "D###". These should be replaced with a 0.1 uF (104) ceramic disc capacitor.

Edited by A.J. Franzman

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I've run into some 6er boards that had a faulty female connector. They only worked right if constant pressure was applied. The only other oddball one was a board that had to be screwed down to the casting even when testing for decent picture.

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