Main > Monitor/Video Forum
RGB Mod TV - Jumping off point
abispac:
Can someone explain to me whats the point on the 5v or 3v o less at the jungle chip? I ask because i though that the point was to show the video at the tv without the use of the mirco chip, and also to be able to display the osd menu when needed. I ask because for me on my recent tv mod, i can still see the osd menu, if i turn it off, the video also turns off. im using the 8bit guy method. Thaks for your time.
buttersoft:
MarkOZLAD's OSD mux method is to be preferred, as this muxes your external RGB with the set's OSD properly, keeping both available at once.
The switches were the previous method, allowing you to choose between the OSD and your injected RGB signal, if they were set up right. The reason you didn't just join the two inputs was because it might have negative effects on signal quality.
The SCART standard, such as it is, expects about 3VDC as a blanking input. Most of the time anything from about 2V to 5V+ was fine, however some jungle chips would respond differently to different voltages. In an extreme case you might have a chip that has RGB off at 0V, half-tone at 0.7V or so, blanking for external RGB at 2V, and then RGB off again at 4V to allow some sort of signal muxing after the jungle chip but before the neckboard. I'm not sure if all those ever needed to exist on the one jungle chip though.
lettuce:
So ive just gotten a Panasonic Broadcast monitor that only supports composite and S-Video, its doesnt have an OSD however. Can Monitors that dont have a OSD still be modded for RGB??
Zebidee:
--- Quote from: lettuce on December 18, 2021, 09:00:04 am ---So ive just gotten a Panasonic Broadcast monitor that only supports composite and S-Video, its does have an OSD however. Can Monitors that dont have a OSD still be modded for RGB??
--- End quote ---
Sure they can, RGB via OSD is just one method.
Best to look for primary inputs to the jungle first.
lettuce:
Ah so even if a monitor doesn't have an OSD it will still have the jungle chip??