Brauchst erstmal nicht schauen... Ich habe da etwas falsch interpretiert. Bei dem Bild war noch eine Word Datei dabei, von der ich dachte, dass dort einfach das, was im Bild zu sehen ist, nochmal erklärt wird. Ich hatte mich zwar kurz gewundert, dass darin von einem 75Ohm Widerstand die Rede ist (kommt im Bild nicht vor), mir aber weiter nichts dabei gedacht, ich bin ja mit dem Bild zurecht gekommen...
Die Word Datei beschreibt aber das hinzufügen von Bauteilen, (zwei 75Ohm Widerstände und ein Kondensator) die im Bild gar nicht zu sehen sind. :roll:
Also wird der Atari 400 morgen nochmal geöffnet und die fehlenden Teile hinzugefügt.
Hier mal der Inhalt der Word Datei:
These are step-by-step instructions on how to install the upgrade in an Atari 400 and What each step does for the Atari Video Signal.
Disclaimer: I am not responsible for you screwing up your computer. You do this upgrade at your own risk.
1 - (RF Modulator)
• Disconnecting the RF Modulator is NOT Necessary in the Atari 400 installation, Although the RF will NOT work after this installation.
2 - (Luma)
• The Luma Signal is not that bad in the 8-bit To begin with. it just needs to bypass all the crap that Atari put in front of it. See the Picture in this folder to see where you should run a 75ohm Resistor from. Run the other end of the resistor to your Luma Out. If the Luma looks too bright, try a 100ohms resistor. Different revisions of the 400 can give slightly different results.
3 - (Chroma)
• The Chroma Signal is The Real Culprit Behind the Atari's Video Problems. It's just Plain Over-saturated. Simply Bypassing all the extra Garbage and connecting directly to Pin 21 of the GTIA with a 22uf 16v Cap is Perfect. A Good Place to Find a Connection to Pin 21 is marked in on the included picture. Connect the Other End of the Cap to your Chroma Out. There is More to this but I will Explain it in the next Section.
4 - (Chroma Ground out)
• To Make the Chroma Work With Newer TV's (Fix The Vertical Banding issue) is as simple as adding one side of a 75ohm Resistor to the IN Leg (Side Connected to Pin 21 of GTIA) of the 22uf Cap on the Chroma line and the other end of the 75ohm resistor to Ground on the Mainboard. This will Get rid of the vertical Banding (On Most TV's) Which is Caused By DC Voltage in the Signal and an Overly Strong Chroma Signal. [NOTE] Just Remember When Combining the Luma and Chroma to Make Composite Video you must NOT have This 75ohm Resistor Connected as the Chroma Signal Will Not be Strong Enough to Mix Well With The Luma and will cause nasty Red and Green Color Shadows as a result. This is why I have Always Used a Switch to Turn the connection of the 75ohm Resistor on or off as I needed.