dirsors wrote: ↑Fri Jan 05, 2024 5:25 am
Has anyone tested whether the TA8801AN chip accepts analog OSD or just a digital signal?
Not sure if this is related, but I also have a Toshiba Jungle IC I've been trying to find info on for a RGB mod on a Sony KV20VM30 TV/VCR Combo.
The goal is to add a SCART RGB input.
https://archive.org/details/manual_KV13VM30_SM_SONY_EN
The Jungle IC is a Toshiba TA8825AN and I've been having a hard time finding details around the specs outside of whats in the service manual.
There are separate OSD and Close Caption ICs on the board and according to the service manual they both appear to output an RGB single to the Jungle IC.
From reviewing the board it looks like both the Close Cap and OSD merge into a single RGB input in the Jungle IC on Pins 19,20,21 for RGB and 22 for BLK.
The OSD IC is a Mitsubishi M35041-065 and Close Cap IC is ZiLOG Z8612912PSCI believe.
While I have done some console mods, this is my first attempted RGB mod, most the research has been on looking through this thread and reading on sunthar's website.
At this point I am not sure if I should try and OSD MUX or attempt to disable to Close Caption IC and merge in there.
Also the extra resistors to ground before entering the Jungle IC is throwing me off, as that is different then a lot of other circuits that I've seen from other Sony CRTs.
![Image](https://imgur.com/gcgame0.png)