Installing an MC Cthulhu and Imp in an Xbox 360 SF4 SE stick

I did that myself, but I’ve had some issues with my stick sometimes plugging/unplugging itself (probably due to faulty soldering). It probably has more to do with my messy wiring/soldering job than anything else.

If it’s clean and you can do it neatly, I don’t see why not - I couldn’t, for the life of me, connect the TE’s USB cables to the imp without “extending” them with 30 AWG wire.

A question sort of related to USB cable connecting. On the IMP board I messed up the metal that each hole has on the surface, some of them fell off while I was soldering. Is this okay?

Hello,

I modded two xbox TE fight sticks and all was well for awhile. However, I plugged both of them into the 360 yesterday to play some MVC and SF HD and when the second player pushes start, it logs me out of my account an makes the other stick primary. Then if the first player pushes start, it logs out the account and makes that stick primary.

Was there an xbox update that jacks up this mod?

PS3, PC, Wii set as primary. IMP, Cthulhu, USB, RJ45 MOD.

PS3, Wii, PC work fine.

Thanks in advance!

Bomberman, I need to start throwing together wiring diagrams for the Chimp, and I can’t find any good scans of the TE board. Do you have an image I can use for the diagrams?

Regarding the issue of where to place a Cthulhu in an SE stick, here’s my solution:

It can be attached to the side of the stick shell using the stock Mad Catz screws (the ones used to fix the 360 motherboard and Turbo PCB). You’ll need to Dremel the two ridges of plastic to get a nice fit, but works best with a Cthulhu that does not have terminal strips.

The Cthulhu board itself sits nicely into the slot made by the art panel, and only two screws are needed to secure the rest of the board - due to the width of the Cthulhu + shell, a stock screw will not penetrate the outside of the shell, so is kept aesthetically clean in that regard.

The advantage of fixing it this way is you don’t need to worry about PCB insulation and a lot less wire needs to be used.

I’ve also found that installing the IMP in the way shown in my pics below is also a very secure method (despite how odd the angle looks) as the two plastic pillars either side stop it from moving in any direction, unless a lot of pressure is applied to the top or bottom (impossible unless the stick is smashed or opened up). It is secured with just one screw to the terminal strip, as previously mentioned in this thread.

Due to using sacrificed USB wire to act as the veins in this mod, every solder point has been reinforced with hot glue, hence the scruffy appearance.

http://i62.photobucket.com/albums/h94/gahrling/DSC00130.jpg

http://i62.photobucket.com/albums/h94/gahrling/DSC00131.jpg

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Hi, I have a pre-assembled PS3-Only CTHULU. You mention that I need to solder the RED-V point on the CTHULU to the VCC point on the IMP. However, the pre-assembled units have the USB jack sitting right in the way. Does this mean I have to desolder the USB jack in order to gain access to the RED-V point on the CTHULU, or can i use any of the other points on the V column? Also, My understanding is that I have to use the screw terminals to connect wires for this version, correct? Or does that need desoldering as well? Thanks!

Desolder the USB jack.

You can remove the Screw Terminals if you want.
You can use the Screw Terminals if you want.

L’after - you do not need to remove the USB jack at all, you can simply run VCC from the IMP to the VCC solder/terminal point on the Cthulhu (it’s how I’ve done all mine to date).

What was I even reading?
Laugh.

Thanks for the replies guys. Gahrling: If i’m getting you correctly, you say you’ve just used the screw terminal VCC point directly to the imp? Does this mean you have two wires coming from that point? From the diagram, I understand the VCC point on the CTHULU gets routed to the 5V point on the TE PCB. Two wires coming out of that point would be ok?

Yes - I have two wires accessing the VCC terminal point on the Cthulhu when doing a dual mod + IMP combo.

You can achieve the same result by using the various other Cthulhu VCC points, but I personally prefer to do it the above way.

Thanks for all your help gahrling. Finally, where did you route the imp D2+ and D2- on the CTHULU, with the USB terminal in place? Last question, I promise!

This sounds what you are looking.

AFAIK, it’s advised to keep the Cthulhu as the primary PCB and the 360 as secondary, so run D1+ & D1- to the Cthulhu. You can solder wires directly to the corresponding points on the USB jack (without removing the jack), or from colums D & E in one of the rows of access points above the jack.

Might be simpler if you solder wires directly to the jack itself, but up to you.

Thanks guys, that’s all I needed to know. I’ll post pics when i’m done. If you were in closer proximity to Calgary, Alberta, Canada, i’d buy you both a beer.

On 360 TE/SE’s it makes a lot more sense to have that as the primary imo, with RS toggling being used for the cthulhu.

You can post me a beer if you like.

I’m not sure of the specifics behind it, but both Toodles and Bomberman have advised using the Cthulhu as primary. Something to do with stability? It’s listed somewhere in the main Cthulhu thread. It’s just another mystery I blindly follow.

In a TE/SE, Cthulhu should always be secondary, with the slide switch controlling the Imp.

Well, I’ve got that completely wrong then. I’ve always wired up the IMP to the RS switch, but have been keeping the Cthulhu as Primary. What is the reason for not doing so, if you don’t mind repeating it here?

EDIT: Ah… not completely wrong - in the Bomberman guide, he labels MC Cthulhu as being Primary, and 360 as Secondary.

It’s just the PS3 Cthulhu’s that he’s labelled as being Secondary.

http://i65.photobucket.com/albums/h201/eastx/arcade%20sticks/mccthulhuandimptosestickdiagram.jpg

Done!

I definitely would, but I don’t think SRK has a beer smilie. If they do, I can’t find it!

So in the excitement of finishing off the project, I forgot to take pictures, but it pretty much looks like a lot of the mods done here. Thanks for all your help, Gahrling, don’t think I could have gotten this done without your help! And props to bomberman and toodles for this. These guys deserve all the praise they get around here.