NoahsMyBro Posted June 23, 2003 Share Posted June 23, 2003 OK, tonight was the night I planned on finally doing the 5200 A/V mod I've meant to do for a very long time now. I'm stumped on something really simple, though. I plan on using the mod described in the 5200 FAQ, found at both Atari Age and AtariHQ. ( http://www.atarihq.com/5200/5200faq/04_13.html ) Near the left side of the diagram, where the 4 Lumas and the Sync connect to the rest of the circuit, are the vertical wire & the horizontal wire supposed to be connected to each other, or do they just cross in the picture, but are supposed to be separate wires? I'm talking about the line that starts with '9.1k'. To the right of that a little bit, the wire running vertically crosses the wire going into the transistor. Should those wires be connected, or not? CR1 750 1.6K | 10 | + | Sync --|<]--///-, ,-///-` | / GND 4.7K | | ___/-------` Luma 3 ---///-----| | Q /|/c 9.1K |--|------(b| ) RCA jack Luma 2 ---///-----| | |e/ 75 __ 18K | | -----,---///-----O__ LUMA Luma 1 ---///-----| | 2K | | OUTPUT 36K | `-///----///--` GND / Luma 0 ---///-----` | 75 GND / Anybody know? Thanks, Steve Link to comment Share on other sites More sharing options...
DanBoris Posted June 23, 2003 Share Posted June 23, 2003 Yes, I believe they are supposed to be connected. So you would have the resistors from the Luma/Sync, the 1.6K resistor, the 2K resistor and the base of the transistor all connected together. Dan Link to comment Share on other sites More sharing options...
jsoper Posted June 23, 2003 Share Posted June 23, 2003 Yeah, Dan's right. One trick I do is to clip the luma resistors and sync diode down short and solder them standing straight up on the 5200 motherboard. Then I solder that 750 ohm horizontally to connect them all. That way you only need one wire going to the transistor circuit instead of five. Link to comment Share on other sites More sharing options...
NoahsMyBro Posted June 23, 2003 Author Share Posted June 23, 2003 Thanks guys. This is probably the most ambitious project I've undertaken so far, and tips like yours are definitely helpful and appreciated. I'm going out of town Wednesday through Monday (finally, the beach, I need it more than you can imagine....), so it's unlikely I'll get this done before then, but once it's done I'll let you all know how I did. -- Steve Link to comment Share on other sites More sharing options...
NoahsMyBro Posted August 2, 2003 Author Share Posted August 2, 2003 Man, it takes me a LONG time to get things done! I can't believe how long I've been getting ready to do this mod. And this is something I want to do! I'll have to point this out to my wife the next time she complains I procrastrinate about things I don't want to do. (And, I am typing this on a new laptop, and I cannot type with this keyboard!) OK, now on to my latest progress, and the reason for this post: I have soldered the Chroma, Luma, and Sync resistors and diode to the board, as Jon suggested. The sync and Luma leads are all tied and soldered together. Where is the best place to get GROUND and +5v ? Also, where is a good place to put the rest of the circuit? I don't want to lose the controller storage bin; I've always appreciated that feature of the 5200. I planned on putting my composite jacks on the aux. port cover. I was thinking of putting the rest of the circuit on a small board from Radio Shack, and just resting the board on top of the aux. port edge connector (with tape insulating the bottom of the board). Any suggestions? Thanks, Steve Link to comment Share on other sites More sharing options...
CPUWIZ Posted August 2, 2003 Share Posted August 2, 2003 You can grab 5V in the middle of the board at C46, here is a diagram. Where you put the mod is up to you really. Link to comment Share on other sites More sharing options...
NoahsMyBro Posted August 2, 2003 Author Share Posted August 2, 2003 Thanks! You often post very clear, easy to understand shots like that. What do you use to label the pictures? (The 5v, arrow, for example) -- Steve Link to comment Share on other sites More sharing options...
CPUWIZ Posted August 2, 2003 Share Posted August 2, 2003 Thanks! You often post very clear, easy to understand shots like that. What do you use to label the pictures? (The 5v, arrow, for example) -- Steve Thanks, I just use Photoshop. Link to comment Share on other sites More sharing options...
DanBoris Posted August 3, 2003 Share Posted August 3, 2003 Any tricks to getting good PCB shots? I have a hard time getting the lighting right to get good clear shots like this. Dan Link to comment Share on other sites More sharing options...
CPUWIZ Posted August 3, 2003 Share Posted August 3, 2003 Any tricks to getting good PCB shots? I have a hard time getting the lighting right to get good clear shots like this. Dan I use a scanner to do that. Link to comment Share on other sites More sharing options...
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