I have a very picky monitor and I am getting a distorted image from my DC when I use a scart cable. However, if I a use my sony trinitron I get a stable picture. The monitor is very precious to me because it has a lower dot-pitch (and a different shadow mask) that make pictures really detailed and crisp, so I find it better to use on close distance, whereas the trinitron is better for looking at a certain distance. Ths exactly same problem has happend with the PS1, Saturn and MD, but I have managed to solve that issue by either using C-sync or running a Lm1881n signal cleaning circuit through Luma (if available). So, it seems my monitor only likes a clean C-sync signal... I was under the impression that the DC scart cable used CVBS for sync but I was mistaken and upon opening the plugs I realized that it actually is wired for C-sync. This suggests to me that the DC Composite-sync signal must have something "wrong" with and that is the cause for my monitor not being able to use it properly. Even if I run it through the Lm1881n signal cleaning circuit I still don't get a perfect image. Anyone has noted this before? Could there be a fix for this? Another thing that is bothering my mind is that I discovered that my cable has both a coil and a capacitor shorting to ground the 12V line coming out from the DC. Why is this? Is there a problem with the 12V the DC puts out ? Noise, maybe?
Hmm, I have been doing some reading here: http://assemblergames.com/l/threads/dreamcast-to-xrgb-mini.44537/page-4 and it seems it is possible to make the DC output Hsync and Vsync in 15Khz? Still trying to work out how pins 6 and 7 make signals available or not to AV port. I also have a Hais Vga box (which I already modified for scan-line effect) and perhaps that could do the trick?
Success! After installing a 2nd switch to my vga box (disconntecting temporarily pin 6 from ground) and making a cable (HD15 to DB9) I finally get a stable picture on the monitor. 480i now looks bearable...
