Boxxdr Method For Installing Transistor Jtag, AUD_CLAMP fix also used Options

[syntaxerror329]

Here is my newest tutorial. A video is coming soon too. VIEW THIS TUTORIAL IN HIGH RES - CLICK HERE

I wrote this tutorial to show how I install the transistor jtag wiring on HDMI versions of the Xbox 360.
The install is easy, neat and fast.

This circuit was developed by Blackaddr.
I also used the SMC patch tool by Blackaddr to move the TMS signal from ARGON_DATA (aka the ROL board point) to the AUD_CLAMP point.
For an explanation of why this is better than the old diode method you should read the PDF file included in Xbox 360 SMC I/O Config Utility.

[PARTS LIST]
2x 10K ohm ¼ watt resistors
2x 2N3904 Transistors
30AWG kynar wire
3/64’ Heat Shrink Tubing

Step 1)
I remove the solder from J2D2 points 1, 2, 4 and 7 using my “solder sucker”
You could also get them cleaned out using de-soldering braid.
If cleaning them is not for you then you can just heat them with your soldering iron and when it melts you just stick the components used in the next few steps through.



Step 2)
Install the 2 resistors as shown.
Allow the excess legs to stick through the board. We will use them in the next step.




Step 3)
Flip the motherboard over. Fold the resistor legs over so they pass by each other.
Add a quick dab of solder to join them and then trim off any extra.




Step 4)
Fold the other resistor legs over as shown and trim them to the length shown.




Step 5)
Add your first Transistor at point J2D2-1.
Take note: The flat side of the transistor faces away from the GPU heat sink.
During this step the center pin on the transistor gets soldered to the resistor in J2D2-7




Step 6)
Install the second transistor.
It goes in just like the other one and its center pin connects to the other resistor.




Step 7)
Solder a piece of kynar wire to each of the remaining legs on the transistor.
You can precut and pre strip each wire.
The wire that goes to the DB1F1 alt point should be 1 ¼ inches in length and the AUD_CLAMP wire should be 3 ¼ inches long.
Slide some shrink tube over each wire to protect against shorts and to make a very professional looking appearance.
Feed the wires through the holes near the southbridge as shown.




Step 8)
Connect wire to AUD_CLAMP




Step 9)
Connect wire to DB1F1 alternate point.
On Zephyr version boards this point may be covered in laminate.
On Falcon versions it is already tinned with solder. If you don’t like this point you can always use the real DB1F1(top) or FT1U2 (bottom)




All pictures taken by BoXXDr
Instructions written by BoXXDr.
Thanks to Blackaddr for his research.
Please contact support@boxxdr.com if you need someone to install this.

[WakenBlake]

I'm a bit confused about wiring an xenon this way. Would it be the same as in the pictures in the first post?

[syntaxerror329]

I'm a bit confused about wiring an xenon this way. Would it be the same as in the pictures in the first post?

Everything is the same except the wires that go to the AUD_CLAMP and the DB1F1 Alt now go to the J1F1 header.

So the wire that comes from the transistor closest to the GPU goes to J1F1-3
and the other goes to J1F1-4

Please take some pictures after you do this and post them here. If you need a host for your photos PM me and i can host them.

[MadBoxer]

Everything is the same except the wires that go to the AUD_CLAMP and the DB1F1 Alt now go to the J1F1 header.

So the wire that comes from the transistor closest to the GPU goes to J1F1-3
and the other goes to J1F1-4

Please take some pictures after you do this and post them here. If you need a host for your photos PM me and i can host them.

Boxxdr,
I went ahead and posted the photo on photobucket. This is a couple views of the Xenon board I just finished with the transistor method. Hopefully this will help clear up some of the confusion people are having. Feel free to host it on boxxdr.com and add it as an example in your tutorial if you want. All that I ask is that you give me credit for the photo example. I can also supply you with hi-res versions if you need it. You may also notice, I used 1/8w resistors and it works flawless! I like how clean it is with 1/8w ones.