TheRetroChannel shares a refined 1084 sync mod that improves SCART video performance on Commodore 1084 and 1084S monitors. Built with help from Adrian’s Digital Basement, this new version fixes issues found in the previous mod and adds greater signal compatibility across model variants.
Although the original mod worked for most users, Adrian’s standard 1084 revealed critical sync problems. As a result, the new 1084 sync mod offers a more stable solution. It handles both composite and RGB signals correctly while eliminating occasional screen wobble and rolling.
In addition, the update introduces a manual fast blanking override. This feature uses the monitor’s existing VCR switch to force RGB mode when necessary. For users with non-standard SCART cables or edge cases, this option adds flexibility without extra components.
The video walks through each step. Viewers get resistor, jumper, and diode placements for both mono and stereo versions. Moreover, all changes are shown clearly with parts lists in the video description. The improved 1084 sync mod ensures support for composite video over SCART, which the older version struggled with.
Testing includes real hardware, such as the PlayStation 1, confirming consistent sync across video modes. The monitor now reliably switches between composite and RGB when appropriate. Fast blanking is handled correctly, and image stability is significantly improved.
Finally, TheRetroChannel shows how to wire the override feature. He explains how to repurpose the VCR switch, making this feature optional but useful. For most users, the base mod will be enough. However, advanced users may benefit from the override for added control.
This revised 1084 sync mod works on both PAL and NTSC models and supports all known variants of the 1084. It is safer, more consistent, and more compatible than the previous solution.
