Post by: Mark Morgan on December 21, 2005, 07:52:00 AM
you may have seen my other post but here is the tutorial:)
Items required:
soldering iron
solder
Parts on list (im a link)
ATX psu or ATX extention cable
cutters
ATX and XBOX psu outputs
method:
cut the cables on you ATX psu 4 inches from the plug or cut the extention in half
tin all the wires
connect each wire from ATX psu to its corresponding spot on XBOX mobo except ones needed in the circuit
ignor the wires you dont need(eg. -12v, -5v)
assemble ciruit depending on version
use heat shrink tube or electrical tape to prevent shorts
assemble xbox
turn on and enjoy the ATXness
any questions or kit(pcb and parts) requests(im in australia) PM me or email me at mark.isda.king(at)gmail.com
good luck
-Mark Morgan
EDIT: the v1.0 - v1.5 has been tested by myself but the v1.6 has not
Post by: hippo on December 21, 2005, 09:57:00 AM
Post by: Mark Morgan on December 21, 2005, 10:25:00 AM
http://forums.xbox-s...howtopic=468564
there are some pics in that link. they are temporary though and when i get my order of pcb's i will take construction pics of the final version.
thanks for the feedback
-Mark Morgan
Post by: iminsane0 on December 21, 2005, 11:03:00 PM
What do transistors do
wats a zener diode
and wat are the little things that are like a circle/cylinder and have wire wrapped around them? i saw them on my xbox psu and mb...
nice tut
Post by: Clubmed112 on December 21, 2005, 11:05:00 PM
Post by: Mark Morgan on December 21, 2005, 11:31:00 PM
4k7 is another way of writing 4.7k
the one i am using is less then half a watt(either 100mW or 200mW)
keep me informed on your progress
-Mark Morgan
Post by: hippo on December 22, 2005, 05:11:00 AM
Post by: Mark Morgan on December 22, 2005, 06:17:00 AM
Post by: Mark Morgan on December 22, 2005, 09:10:00 AM
QUOTE(Mark Morgan @ Dec 22 2005, 09:24 PM) 
yes this is not your ordinary hack. it drops the 5v to 3.3v a different way and it also inverts the pwnon signal. these are both needed to get it working correctly
PWRON***
Post by: Clubmed112 on December 22, 2005, 10:02:00 PM
Also for the "start" wire, i assume you mean the 3.3v standby on the xbox? In other words, the blue wire according to this diagram? http://pablot.com/in...box&submenu=psu
Also in your link above, you list a F2N 5770 transistor, will this work for my 1.6?
Post by: Clubmed112 on December 23, 2005, 12:22:00 AM
I built my circuit, just haven't soldered in a trandsistor yet, waiting on which one i need.
I am about to start wiring it in to my power supply and all that. If you all want i can take a few pics, i got my project board pretty smally so it shouldn't take much room.
Post by: Clubmed112 on December 23, 2005, 02:16:00 AM
Post by: Clubmed112 on December 23, 2005, 07:11:00 AM
Someone told me to use a 1k resistor in place of the 4.7k, not sure why, but i may try that too, i think cause i have such a high wattage transistor.
Hope someone posts and can help me out. Thx a lot guys.
Post by: Mark Morgan on December 23, 2005, 11:06:00 AM
Q2. START = PWRON
make sure they are all connected up properly. also try just connecting the PWRON or start signal directly instead of going throught the circuit. wish i could help more
Q3. this is because v1.6 uses 5v on standby therefore no need to reduce the voltage on the power ok signal and the 5v standby is powering the transistor and the START or PWRON is being inverted.
I just reformatted my computer so i have been away all day:|
-Mark Morgan
Post by: Clubmed112 on December 23, 2005, 11:54:00 AM
Post by: Mark Morgan on December 23, 2005, 06:51:00 PM
wish i had a 1.6 here to test it with. just double check everything is solder correctly. i really cant think of anything else other then the circuit
-Mark Morgan
Post by: Clubmed112 on December 23, 2005, 08:08:00 PM
Post by: Clubmed112 on December 25, 2005, 06:15:00 AM
Post by: Mark Morgan on December 26, 2005, 09:18:00 PM
Post by: blueinfinity on December 30, 2005, 04:57:00 PM
im parts ordering off digi key
i found my needed resistors. but the npn transistors... umm. well
i found NPN silicon bipolar transistors.
but theres a bunch of em id otn knwo which i need :S
www.digikey.com if someone could maybe even snag me a part number for something that would work as Q1
please. thanks
Post by: blueinfinity on December 30, 2005, 05:08:00 PM
http://sales.digikey...temseq=32456334
http://sales.digikey...temseq=32456341
http://sales.digikey...temseq=32456347
or these three?
http://sales.digikey...temseq=32456628
http://sales.digikey...temseq=32456634
http://sales.digikey...temseq=32456640
oh god help im stillt rying to learn how to read this website lol
and this transostor is the one i think is right?
http://sales.digikey...temseq=32456684
thank you again!!
Post by: blueinfinity on December 30, 2005, 06:54:00 PM
Post by: Mark Morgan on January 01, 2006, 02:39:00 AM
sorry bout not responding earlier but im stilll having comp troubles
-Mark Morgan
Post by: xman954 on January 01, 2006, 10:35:00 AM
QUOTE
www.digikey.com if someone could maybe even snag me a part number for something that would work as Q1
2N3904FS-ND ($0.16 each)also the zener's
1N4728ADICT-ND ($0.36 each)
Post by: blueinfinity on January 01, 2006, 10:48:00 AM
QUOTE(xman954 @ Jan 1 2006, 01:42 PM)
2N3904FS-ND ($0.16 each)
also the zener's
1N4728ADICT-ND ($0.36 each)
awesome how about resistors?
thanks!!
theres so many resistors ones like 3 cents each and others that are like 67 i dunno which i need :S
Post by: xman954 on January 01, 2006, 11:14:00 AM
QUOTE
i wasnt sure which way to face them though so im hoping i got it right
resistors have no polarity (either way)
cheep resistors are fine (carbon film)
just make sure the 22 ohm is 1 watt or higher
at http://www.paradoxblue.ca
check over your circuit diagram, the xbox side orange 5VSB should got to the power supply 5VSB (purple ?)
Post by: blueinfinity on January 01, 2006, 11:59:00 AM
i know resistors ahve no polarity. i meant the transistor.
Post by: xman954 on January 01, 2006, 01:48:00 PM
look on the RS package
it should say if not lookup the #
Post by: Mark Morgan on January 01, 2006, 07:33:00 PM
(if you have any left after new years 
)-mark Morgan
Post by: blueinfinity on January 01, 2006, 10:51:00 PM
i got a circuit mader i jsut hope my transistor is pointing the right way :S
Post by: Mark Morgan on January 01, 2006, 11:08:00 PM
Post by: Clubmed112 on January 03, 2006, 06:01:00 PM
QUOTE(xman954 @ Jan 1 2006, 07:21 PM)
resistors have no polarity (either way)
cheep resistors are fine (carbon film)
just make sure the 22 ohm is 1 watt or higher
at http://www.paradoxblue.ca
check over your circuit diagram, the xbox side orange 5VSB should got to the power supply 5VSB (purple ?)
QUOTE(blueinfinity @ Jan 1 2006, 08:06 PM)
i dunno this is wut i was told by someone else. thats for the 1.6 psu
i know resistors ahve no polarity. i meant the transistor.
Ya, i told him something like this, but thats not what i meant, i was trying to say that make sure on the xbox side, the orange wire goes to the red wires on the atx side, seeing as there 5v and not 3.3v on the v1.6 xbox. Anyway, hows it comin blueinfinity?
Hey mark morgan, i got another prob man! lol, sorry, if you care, you can read about me bitching about it to myself, i basically went from asking about help on something, to whining about all the things that aren't working, lol, anyway, here u go: http://forums.xbox-s...=0#entry3161915
Post by: Mark Morgan on January 18, 2006, 01:52:00 AM
http://forums.xbox-s...howtopic=481935
-Mark Morgan
Post by: Tsanford_01 on March 02, 2007, 06:49:00 AM
new guy here trying to contribute, hope this isn't a dead forgotten thread
. I just wanted to post after building the circuit for the V1.6 and let all know that it will NOT work. The 5VSB on the ATX PS will not take the full 5V load of the xbox. So, I tried to put a blocking diode on it and connect it to the other ATX 5V wires(red), but no go. The diode and load of the xbox drags it down to <4V, and this is not enough to get it to fire up (no 3.3v on start pin with power button). I did get it to work...sort of by jamming on the ATX all the time. Turn on the ATX all the time (ATX pin 14 to ground). Connect all 5v outputs on ATX to 5v on Xbox. Connect all grounds on ATX to grounds on xbox. Connect ATX 12V to Xbox 12V. Connect ATX PwrOk to Xbox PwrOk. Leave xbox start unconnected. Leave ATX 5VSB disconnected. Leave ATX -5v, -12v & 3.3v disconnected. Thats it..No circuit. Bad part is ATX runs all the time, but the xbox acts normally, power button powers it on and off .. eject power up etc.**Warning - Do not plug in the Power Supply while it is on...Use swith on ATX or unplug from 120v to turn off **
**Warning - Do not use the power switch on the ATX to turn Xbox off it could damage a transistor on the xbox always, power the xbox up and down normally with its power button. Once Xbox if powered down you can turn off ATX**
No flames please, I know this is a rather crude mod. I will be working out the circuit to get the ATX to power on and off correctly. The circuit in this post for the V1.6 only provides a momentary grounding of the ATX Pwron pin when the power button on the xbox is pressed, so it turns right back off when you let go of the button. It will need a latch.
Dang that was long winded..Hope it helps someone.
Post by: sann_1 on March 05, 2007, 06:56:00 AM
QUOTE(Tsanford_01 @ Mar 2 2007, 09:56 PM)
Hi all,
new guy here trying to contribute, hope this isn't a dead forgotten thread
. I just wanted to post after building the circuit for the V1.6 and let all know that it will NOT work. The 5VSB on the ATX PS will not take the full 5V load of the xbox. So, I tried to put a blocking diode on it and connect it to the other ATX 5V wires(red), but no go. The diode and load of the xbox drags it down to <4V, and this is not enough to get it to fire up (no 3.3v on start pin with power button). I did get it to work...sort of by jamming on the ATX all the time. Turn on the ATX all the time (ATX pin 14 to ground). Connect all 5v outputs on ATX to 5v on Xbox. Connect all grounds on ATX to grounds on xbox. Connect ATX 12V to Xbox 12V. Connect ATX PwrOk to Xbox PwrOk. Leave xbox start unconnected. Leave ATX 5VSB disconnected. Leave ATX -5v, -12v & 3.3v disconnected. Thats it..No circuit. Bad part is ATX runs all the time, but the xbox acts normally, power button powers it on and off .. eject power up etc.**Warning - Do not plug in the Power Supply while it is on...Use swith on ATX or unplug from 120v to turn off **
**Warning - Do not use the power switch on the ATX to turn Xbox off it could damage a transistor on the xbox always, power the xbox up and down normally with its power button. Once Xbox if powered down you can turn off ATX**
No flames please, I know this is a rather crude mod. I will be working out the circuit to get the ATX to power on and off correctly. The circuit in this post for the V1.6 only provides a momentary grounding of the ATX Pwron pin when the power button on the xbox is pressed, so it turns right back off when you let go of the button. It will need a latch.
Dang that was long winded..Hope it helps someone.
Any updates...me also stuck with not able to get the 3.3V PWRON signal as i split the 5V stby from ATX to the 4 xbox 5V stby
Post by: sann_1 on March 07, 2007, 02:29:00 AM
QUOTE(sann_1 @ Mar 5 2007, 10:03 PM)
Any updates...me also stuck with not able to get the 3.3V PWRON signal as i split the 5V stby from ATX to the 4 xbox 5V stby
???
Post by: Tsanford_01 on March 14, 2007, 03:55:00 PM
. I did want to post another warning if you do use the wiring method I described.***WARNING YOU MUST ALWAYS TURN OFF THE ATX AFTER YOU POWER OFF YOUR BOX OR IT WILL DIE***
No, I didn't kill mine as I was only using this setup for bench work, but did notice as I was working that when you power off the xbox since there is no signal to turn off ATX the processor seems to still run, but the fan and everything else turns off. I have no doubt if one was left in this state it would soon badly over heat. Mine started heating up pretty quickly on the bench ..In a box it could get ugly.
Now that I finally got the HD rebuilt and the system working again I will look into the ATX PS a little farther.
Post by: ustek on May 09, 2007, 05:31:00 PM
My XBOX's went dead when I replaced a bad HDD.
It seems there was no workable solution so I've made up my mind to do it myself.
I've made my mind to find a solution.
PART 1
I have XBOX Ver. 1.6 with TUSCANY PS.
The PS turned out working, but a kind of wierd.
The 5VSB was floating when there was no load, but under load it was +5VDC as expected.
Further, I found that 5VSB and 5V ouputs are separated with a FET.
The FET was OK. I tested all component on the TS's board except the main PWM
IC. Seemingly it was bad.
===
But, what was good that ALL PS's voltages as well as the connector (Molex 20pin) were easily available from
ATX power supplies! I have quite a few of them.
I removed the original PS and connected 2 ATX power supplies to my XBOX
to simulate 5VSB and the rest of the voltages and controls independently and separatly.
My XBOX was working except that I have to make a lot of consecutive connections to follow the
original PS' logic, made a new wiring harness and other modifications to meet the load max.
The box was up and running except for a hardly visible color distortions on TV, low level sound and rotating fan when power on button was depressed to power off the unit. I will resolve these issues in the folloing parts if anyone has interest.
Please post your comments.