kyokorn

Hello friend, I used a NPN Transistor 2N3904- For the potenciometer I'm not sure what was the value my friend, but you can try just replacing the potenciometer (500 Kohms) and move it until you have on the screen a good blue and green (running the memmory test). I really hope you can fix your Atari, let me know if i can help with some else 😃 P.S: Here a picture of my little Atari collection, Good Luck!

Hello friend, the diagram is part of the pcb design by @Andrew Davie and @Al_Nafuur (By the way thanks both you rulz guys!) You can open the file using "Autodesk Eagle" (You can get a EAGLE Free License For Non-Commercial Use) BR kyokorn PlusCartUnified.brd

Hello friend, Here you have the diagram, with the pin out and the points where the cables was soldered. Good luck!

My bad, i was soldering wrong MISO, MOSI & CLK, now is working fine !!! thanks for this beautiful project !

Hello guys, I have the original PCB (Pluscart), I just add a litlle sd reader following the tracks of the file PlusCartUnified.brd I flashed the board using the PlusCart_Duo_102.3.1.elf But my sd is not recognized I tried to format the sd -> FAT, FAT32, exFAT, also on the atari using the option format sd, but is not working, Any ideas what is the issue? Many thanks in advance!

Yes ! The problem was the RIOT chip , is faulty , BR

I changed the TIA and the CPU and the result is the same , the power supply looks fine, 9V/1A actuallly tested in a heavy sixer works gerat with the same power supply, I will test the RIOT chip I dont have any spare but i will test with another from other Atari. Thanks!

Hello i have this Atari Jr 2600 with a issue in the video, the screen is glitched with any Game, any idea where is good point to start the teoubleshooting ?

Hello , i have an Atari XE, with the same problem, on my case i replaced the transistor Q5 and the potenciómeter (500k) with that i fix the issue

Ohhh got it s-video, Nope, I'm using the external converter with separate power source, but yes i will use my Atari Vader to put the converter inside the Atari, and I will use another power source with more mA, the mA consumption for the AVtoHDMI converter is 270 mA, so i think with 9V and 1A will be enough right?

If is a question yes, you can make a video mod with just with a couple resistors and 1 transistor, i did on the last week (on one of my ataris) and yes the result is awsone, But I complemented the solution with a simple and cheap AV-2-HDMI converter. Yo can find the guide that I used here: https://www.instructables.com/ATARI-2600-Video-Composite-mod/ Cheap converter: