TG16:Super SD System 3

The Terraonion Super SD System 3, introduced in 2017, is a device that attaches to the back of a TurboGrafx-16 or PC Engine console and acts as a combined flash cart, optical drive emulator (ODE) and RGB output solution. It is closely modeled after the official NEC AV Booster attachment, originally released in 1988 to provide AV output to an original PC Engine. ROM files and disc images are loaded from a microSD card and a 9-pin mini-DIN connector is present for both RGB and composite video output. This connector uses the same pinout as the model 2 Sega Genesis/Mega Drive.

Although it is a highly versatile device and functions well, original revisions manufactured before 2019 require both video and audio bypass boards due to board routing issues.

Video Bypass Board

A video bypass board known as the FU-RGB was created by Mobius Strip Tech and Voultar to fix the SSD3's video issues, particularly with its RGB output as it is susceptible to interference from the SSD3's digital circuitry. The files to produce FU-RGB boards can be downloaded here: http://retrorgb.com/assets/Voultar/FU-RGB\_2018-11-23.zip

A note from Voultar.

"This video amplifier is designed to replace all of the analog video circuitry on Terra Onion’s SSDS3 unit. I designed this with the intention of resolving all of the various analog errors found in Terra-Onion’s original video circuit design. I only have so many PC-E consoles to test with, but I believe that this will provide a substantial improvement to video clarity.
C-Sync is properly buffered so that if you’re using a Model 2 Genesis C-Sync cable that doesn’t attenuate the C-Sync line, C-Sync will trigger just fine as a low impedance line. However, IF your Genesis C-Sync cable does attenuate the C-Sync line (with a resistor in-series) and you have trouble getting sync to lock-on, you may short the “470Ω” jumper to resolve intermittent (picture dropping) sync locking. This probably won’t be necessary, 90% of the time.
Component Map & BOM can be found within the zip file. You can download the GERBERs from OSH-PARK and use whatever board-house you prefer.
I was NOT paid to do any of this. I’m giving this to the community at absolutely ZERO cost, for everyone to use. I believe that you people have paid enough for the SSDS3 & it would be extremely amateur & in remarkably bad taste for me to make a product & sell it for profit, taking advantage of an unfortunate situation. Having said that, Mobius Strip Tech is offering these boards pre-assembled virtually at cost, and has a very cheap installation service, if you don't want to do any of this yourself. I will not provide documentation or support the FU-RGB. Good luck."

Pre-made audio and video bypass boards are available for people to purchase, as well as installation services:

Audio:  http://www.firebrandx.com/ssds3stereobypassamp.html Video:  http://www.mobiusstriptechnologies.com

UK Seller (offers all):  https://videogameperfection.com/products/fu-rgb-bypass-board-for-ssds3-installation-service/ 

Audio Bypass Board

FirebrandX has posted the design files of his audio board for anyone who wants to make their own:  https://oshpark.com/shared\_projects/toEy2VLz