Muh Mullet: "I'm testing and comparing my RGB mod for the 450/550 and Mobius Strip Technologies' solution for RGB from these models. From what i can see on my CRT so far, the Mobiusstrip board produces a pretty dark image, and colors seem less vibrant than they are with my mod. So i suspect there is something that could be improved in the attenuation of the RGB signals in their design, maybe the pulldown resistors on the input are the wrong value? My question for members with Photo-CD or VCD experience, is it possible to make a disc with colorbars and other test images like those used in the 240p test suite?"
Retrostuff:"In the Service Shell, you'll find a test image with EBU colour bars. You can compare the outcome with my mod [in this article]. [You can enter the Service Shell] on
a 450+550 [by] short pinning connection 2 and 3 of the controller port and switch it on. When
you see the service shell, remove the short and connect a mouse-like
controller (Mouse, Trackerball, Roller Controller). Regular controllers
won't work. You can find all details about it in the service manual. "
[Thanks, Retrostuff, Muh Mullet, Mobius Strip Tech]