jonschultz's latest activity
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JI thought I would share some of my progress on getting VGA output on a Color Classic using my XC1186B reverse-engineered replacement...
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Jjonschultz replied to the thread 84V Mod on Color Classic - Thick light gray bars.This might simply be from the horizontal deflection (refresh) now running at 67Hz instead of 60Hz, and there just happens to me more...
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Jjonschultz replied to the thread 84V Mod on Color Classic - Thick light gray bars.Hi @surfer150, this is an easy fix. What you're seeing is that the G2 voltage (sort of like the black level control right at the tube)...
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Jjonschultz replied to the thread CRT width.I see, but a bright, horizontal line means that vertical deflection has failed. Horizontal deflection is still working just fine in that...
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Jjonschultz replied to the thread CRT width.I'm not too familiar with the TDA1170N, but it looks like it's a vertical deflection IC, similar to other ones that I've seen. I don't...
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Jjonschultz replied to the thread Mystic Color Classic Screen Distortion.Another place to check is on pin 7 of the TDA8172. You should get around 5V here. What you’re seeing could be related if it’s way off...
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Jjonschultz replied to the thread Mystic Color Classic Screen Distortion.I have a partial schematic here, but others have more complete ones. @ArjenCNX recreated the whole board and has the schematic posted in...
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Jjonschultz replied to the thread Mystic Color Classic Screen Distortion.Actually, CF10 might be just outside of the RF cage (I don’t have my board in front of me at the moment to check), so it might be easier...
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Jjonschultz replied to the thread Mystic Color Classic Screen Distortion.The fact that it’s shifting around vertically makes me think it’s related to the TDA8172 (vertical deflection IC) or components around...
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Jjonschultz replied to the thread Weird discoloration on Color Classic CRT.I’ve never really heard much of a noise from a CC’s degaussing coil, so I think it’s just the case that they’re designed for pretty low...
