Tutorial written by : P-2-Z (http://www.cit.uws.edu.au/~luke/xbox.html)
Greetz to: Captain_Chunky_Sword

PLEASE NOTE THIS WILL DEFINATELY VOID YOUR WARRANTY

This tutorial will show you how to modify your XBOX so that you get S-VIDEO (erronously called S-VHS) and digital audio (SPDIF or OPTICAL) out. This make your xbox look and sound much nicer!!! I have tested this on my own xbox and it works great :)

WHAT YOU NEED BEFORE YOU ATTEMPT THIS

DIGITAL AUDIO INSTRUCTIONS

The digital audio SPDIF is the easiest connection to setup, so we will perform this one first.

1. Take apart XBOX, voiding your warranty and remove motherboard from chasis.
2. Tin your wires, I recommend 1 metre of wire, cut in half, and a 5cm piece of wire.
3. Mark one wire as your spdif ground, bit of texta is cool.
4. Solder spdif ground wire to pin 5
5. Solder spdif data (other) wire to pin 3
6. Using spare piece of wire 5cm long, solder pin 18 to your favourite ground point.(Any part of the case, or a screw socket).
7. Solder your spdif ground wire (pin5) to the outside leg of your spdif connector.
8. Solder your spdif data wire (pin3) to the inside(data) leg of your spdif connector
9. Wrap the wires around the bottom of mother board. and reassemble XBOX

So the wire going to your RCA socket should look like this, with SPDIF DATA (pin3 going to center leg, and SPDIF gnd (pin5) going to outside leg.

---p-i-n-5----===+----------+
                 |         / \
---p-i-n-3----===+        |   |
                 |         \ /
                 +----------+

You now have a working SPDIF digital sound output connection, You just need to enable it in the software now. Start the MS Dash and choose audio settings, you must now choose Dolby surround, and then enable Dolby 5.1 and DTS. Your SPDIF will now output these surround modes, check that your surround processor is getting the right signal, and enjoy surround sound :)

I chose to mount my SPDIF connector at the back / top / center of my xbox, where there was no need for drilling as I could simply run the wire out the small gap where the fan is.

S-VIDEO INSTRUCTIONS

This will setup an S-VIDEO connection on your xbox. NOTE YOU WILL STILL NEED TO PLUG THE STANDARD AV PACK INTO YOUR XBOX. HOWEVER YOU DO NOT NEED TO CONNECT IT TO ANYTHING.

1. Disassemble your xbox and remove the motherboard (again voiding your warranty).
2. Tin your wires (i recommend having 4 pieces, each 50cm long).
3. Mark your wires as such, (Y, Y-GND, C, C-GND). You need to be able to tell all these wires apart easily when attaching to your S-VIDEO socket.
4. Solder wire Y to pin 11.
5. Solder wire Y-GND to pin 12.
6. Solder wite C to pin 22.
7. Solder wire C-GND to pin 21.
8. Wrap wires around side of motherboard and reattach mobo to XBOX chasis.
9. Push all 4 wires (Y, Y-GND, C, C-GND) out through either the hole you drilled, or the rear fan.
10. Solder all 4 wires (Y, Y-GND, C, C-GND) to your S-VIDEO socket(TABLE 2) and mount it on your xbox.

S-VIDEO Please note excellent wiring diagram =-D

       /---+     +---\
      /    +-----+    \
     /                 \
    /    O 3     4 O    \
    |                   |
    |  O 1         2 O  |
    |                   |
    +----+         +----+
          \________/	

You now have a Advanced AV XBOX without forking out $50AUD.