Leatherrebel5150

I had the same problem with my Gorf cart recently but did get it to work

Old bump @jaybird3rd but are these things only setup to be used with EPROMS or can the original maskroms just be transplanted over to these boards? I've been having problems with a River Raid cart that I would like to fix it but really just want to transplant rather than replace everything outright.

I have 722 listed for SNES and 707 for the Genesis on my personal tracker. I’ll take the time at some point and find the differences

No I didn’t see it until just now. Im so used to seeing a little icon or something saying someone responded to a thread. It doesn’t do that here and I just assume no one answered. Thank you for that link. Yea, I assume all the RF related components would go. But Im not sure exactly what all of those components are. Everything tied to the Lum 0, 1, 2 pins? What about the color/BW components? etc The schematic Im working from also doesn’t show the Switchboard side. Theres a couple of components on there that I think can go but am not positive. Specifically L101, L102, C101, C102, C105. Since you know of the other thread I had. I’ll explain that after getting it mostly together and thinking about it, having a drop in replacement with the RF components just isn’t practical to expect someone to tune it to get a signal. So Im moving it to composite

Im trying to find a full list of parts that are not needed on a 6 Switch if one was to use composite video. I know of a couple of parts that are sometimes recommended to be removed, Im sure there are more that can be left out. Yes, I know things could be left in place non functioning. But if you were to populate a board from scratch and going with composite what components could be left off entirely?

Did Best have the boots? I thought they did but could be wrong

Glad I found this thread I saw these for sale on ebay but they have them for $29 for a full set of 1 controller. But the direct sale from the website is much better, especially since Im looking for 2 sets

If your ever looking for a collaborative effort, I do design work with ORCAD and started this project a few weeks ago

I've seen that. What that one does is just create the shroud around the "standard" connector. I already had linked in my list of parts. That doesn't actually do anything except allow the dust flaps on certain games to be engaged/alight the cart into the connector a bit better. That works fine as a free standing unit like it is. But to get a board to be a drop in replacement to the original, the connector itself would have to be shaped entirely different than what is used there with respect to how its soldered to a PCB.

I didn't get too much traction in the Atari 2600 specific sub-forum, so I'll try here. This is original post. But I still need help verifying replacement parts as I try to use modern and readily available replacements for everything except the 3 main IC's for obvious reasons. I'm fairly positive most of these parts I've found will work but some things I'm not 100% on, like the replacements for the Styrene Caps and NPN transistor. In addition to still needing to find a replacement for the power jack, cartridge connector, and adjustable inductor. So any help or suggestions is greatly appreciated Reference Designator Original Description/Part number Potential Replacement Link A203 Buffer/C010816 (4050B) https://www.digikey.com/en/products/detail/onsemi/MC14050BDR2/11523310 C204 Mylar Cap .1u 100v (21-101104M) https://www.mouser.com/ProductDetail/KEMET/MMK5104J100J01L15.0CBULK?qs=XYa9guDHUMwv0FaGsaMGvw%3D%3D C201 Electrolytic Cap 4.7uF 35v (C010336) https://www.digikey.com/en/products/detail/panasonic-electronic-components/EEU-EB1H4R7SB/2689398 C206, 207 Styrene Caps 820pF 50v (C010821) https://www.mouser.com/ProductDetail/Vishay-Vitramon/VJ0805D821KXAAJ?qs=sGAEpiMZZMs7ZEmUmaUL09qlKXKscFs3tgcyC0RYJ8U%3D https://www.mouser.com/ProductDetail/Xicon/23PS182?qs=VbcEA1k3avPcAZ98yxGp3g%3D%3D C215-218 Mylar Caps .068uF 100v (C014353) https://www.digikey.com/en/products/detail/kemet/R82EC2680DQ60J/3877102 CR200, 201 Diode 1N914 (31-1N914) https://www.digikey.com/en/products/detail/onsemi/MMSD4148T1G/919705 CR202, 203 Zener Diode 1N4736 6.2v (C017654) https://www.digikey.com/en/products/detail/micro-commercial-co/SMAJ4736A-TP/950463 L200, L203 Ferrite Bead (C014384) https://www.digikey.com/en/products/detail/tdk-corporation/MLZ1608N1R0LT000/2523491?s=N4IgTCBcDaILIBkBaBGAbABgBwDsUCcMAbAFw3JAF0BfIA L202 Inductor 2uF (C010822) https://www.digikey.com/en/products/detail/eaton-electronics-division/SD53-2R0-R/1555485 Q200, 201 PNP Transistor 2N3906 (C018991) https://www.digikey.com/en/products/detail/diodes-incorporated/MMBT3906-7-F/770797 R211 Resistor Variable 500K (19-411504) https://www.digikey.com/en/products/detail/bourns-inc/3352T-1-504LF/1088353?s=N4IgTCBcDaIMxwKxgC4FoCMbEAYAsANgGYgC6AvkA X200 Crystal 3.579575 (C015510) https://www.digikey.com/en/products/detail/ecs-inc/ECS-35-17-4/27508 J202, 203 Socket Controller (9 Pin) (C010727) https://www.digikey.com/en/products/detail/te-connectivity-amp-connectors/5745001-3/1123779?s=N4IgTCBcDaIKwHYAscAMqCMBaAzCAugL5A Q202 NPN Transistor MPS3563 (34-MPS3563) https://www.digikey.com/en/products/detail/rochester-electronics-llc/MPS3563RLRAG/12118458 Is there an SMT option? J204 DC Power Jack (79-5918) ? L201 Adjustable Inductor 12 1/2 Turn .6-1.2mh or uh variable sound coils (C010823) https://www.mouser.com/ProductDetail/Coilcraft/143-16J12L?qs=ZYnrCdKdyedGtyVQ9HC7dA%3D%3D Cartridge Connector ? https://www.digikey.com/en/products/detail/sullins-connector-solutions/EBC12DCWN/927256

Ive kind of started something similar for the 2600 6 Switch. But Im not adding anything like HDMI, Im just looking to make a drop in replacement that uses as many modern components as possible. I posted it the other day

I guess it could be scavenged, thought I would still like to avoid it. The main ICs already have to be pulled from existing boards/stock from Best. Right now I just need the footprint for the board but I think there is a way to adapt the modern connector to it.

Summary: I've been working on a drop in replacement motherboard for the 6 Switch systems. I've had a shot PCB for a long time and finally took the initiative to design a replacement board. I know that there was an attempt made at this a couple of years ago that look like it petered out after the creator lost his files (also seemed like there was a bunch of feature creep as well). For this Project I'm maintaining the scope of just a functioning replacement without extra bells and whistles unless absolutely necessary. Part of this goal is replacing as many components as possible with modern/readily available components. Progress So Far: I've recreated the schematic as much as possible in ORCAD based on this schematic and the field service manual parts list (starting on page 135) https://wiki.console5.com/tw/images/e/ec/2600_Field_Service_Manual.pdf I've also got the footprints of the components and board file setup to start placement. My hope now is to get some help from everyone here in order to move through the next steps. I need some help with confirming the replacements chosen for some components are appropriate and if not what an alternative might be. If anyone could help with that see my list of replacements for a given component in the attached excel sheet. Specifically I am stuck trying to find a replacement for J204 DC Power Jack, L201 Adjustable Inductor, Q202 NPN Transistor and the cartridge connect itself. The DC Power Jack and the Adjustable Inductor I have nothing on currently. I have an available transistor for Q202 but it is an older legacy part and would like to use something that's modern and surface mounted. The cart connector I know this is available https://www.digikey.com/en/products/detail/sullins-connector-solutions/EBC12DCWN/927256 But if I remember right the original connectors pins through the board are longer/angled? The one off the board I'm working with is buried in my stuff somewhere, I have to find it to check. So if anyone could help with this part selection process it will get the most difficult part of the process completed so I can move on to placement and routing. Modern Replacement PArts.xlsx Atari_2600_6_Switch_Motherboard.pdf

It’s actually not too scary for me. I’m a PCB designer by trade and am completely comfortable working on this stuff, though Im obviously not familiar with the 5200 circuity. But I know to ask before jumping in because there is always some little tip or secret sauce that someone knows somewhere to make life easier, and to prevent doing something like adjusting the wrong pot or variable cap or something. I actually have a plastic tool set kicking around here somewhere for this kind of thing. Thanks for all your help so far

The CRT’s I have don’t have any kind of fine tuning on them, at least that I could find. But I did get the signal to come through on a more modern flatscreen, so I will try adjusting the RF to work with the CRT.