Hi,
I'm new to the forum and unable to start new threads, so I hope no one minds my posting to this one.
I own a Neo-Geo AES (serial #17521) and a Neo-Geo CD.
The Neo-Geo CD works great through S-video on my Panasonic CRT (CT-27624A, circa 2000).
I hoped a Neotropolis AES mod (with JROK 4.1 encoder) would work equally well, but it doesn't.
The JROK outputs a very horizontally wavy image, which I assume is unstable H-sync.
It's not isolated to this TV; virtually any TV that syncs the system shows it to some degree. I've tried to document every finding here with photos or video examples.
http://www.anthrofox.org/projects/neo_geo_jrok.html
In researching this forum I've found the following comments.
From
http://www.neo-geo.com/forums/showthread.php?217328-Issues-with-JROK-component&highlight=JROK
"You can try putting a 0.1uf cap on the sync line on the sync input to the encoder and see if that works."
and
"...you can't run a cab parallel to the jrok it has to run serial using the rgb pass thru."
From this thread, regarding a Neobitz, there was the suggestion "try adding a 0.01-0.10uf ceramic capacitor to the Sync output from the Neobitz encoder if you get no results from component video at all."
So what might be a good plan of attack in this case?
1. The JROK was installed in parallel with the Sony TV encoder, and the JROK's capacitive loading DOES cause problems on the Sony encoder (dark image). Should the JROK's RGB/Sync/GND passthrough be fed in to the Sony chip instead? (i.e. is the Neotropolis REI mod inherently flawed?)
2. Would an additional 0.1uF cap be advised? And can someone explain schematically exactly how it should be connected?
- close to the JROK sync input or somewhere else?
- signal-to-ground or in-line with signal?
Thanks!!