Jtag - burned jtag board for nand-x

[Mrbuzz102]

Just a quick question.

can i jst use wires for my jtag part as i burned one of the contact pads off my Jtag nand x board.

Will this be ok?

can i still use the nand x to dump my nand?


Many thanks in advance.

Mr Buzz

 

[jfelding]

Im assuming the burned 'contact pads' are the qsbs and not the actual motherboard. If that is the case, then yes and yes

 

[Mrbuzz102]

yea thats right on the qsb unfortunatly, will carry on with wires.

another quick question

i have seen on some forums they say use 100 ohm resistors? can you still do the jtag without them?? i have x2 100ohms here but on the other diagram it says you need 5??

cheers in advance.

 

[jfelding]

yea thats right on the qsb unfortunatly, will carry on with wires.

another quick question

i have seen on some forums they say use 100 ohm resistors? can you still do the jtag without them?? i have x2 100ohms here but on the other diagram it says you need 5??

cheers in advance.

Dont worry as long as you didn't burn the motherboard .
What motherboard are you jtag'n?
Dont know where you read about 5 100ohm resistors. I only heard about 2 diodes or 3 100-/330ohm resistors

 

[Mrbuzz102]

im doing a xenon the now. but i have a zephyr and a falcon there too. I have another 2 xboxes here

x1 Zephyr - Dash 2.0.6717.0 - MFR - 15.7.2007 (Blade Dash)
x1 Falcon - Dash 2.0.7357.0 - MFR - 30.10.2008 (NEX dash)

so fingers crossed for them

Did have a problem with my 1st attempt used a 30w iron and burned x2 traces on the board so couldnt jtag that one. the consol still works perfect even tho 2 traces are compleatly burned off.

so down to a 15w iron now to prevent this

 

[Mrbuzz102]

this is where i saw the 5. 100 ohms

Im having trouble soldering the small board onto the xbox. this is defo the smallest thing i have ever tryed to solder lol. dont wanna mess up the last 3 xboxes i have lol

 

[manwithoutname]

The 5 x 100ohm resistors are only needed for the LPT cables for reading and writing the NAND. Also you might want to add a 470ohm resistor for the jumper section. I used just wire it but I noticed better results with 470ohm resistors.

 

[jfelding]

manwithoutname, just wondering, what kind of better results? Stability or consoles that would just e79 without the resistor?

 

[Mrbuzz102]

could i just cut the wired from the pin headers on my nand-x and solder the wires direct to the board? would this be a better option?

 

[manwithoutname]

For example, slightly less temps and the whole thing feels a bit more responsive. I guess now I understand why mainly the xenons I jtagg'ed RROD' on me soon. I only got the insight to do this after I finished jtag'in someone's else Zephyr using the QSB and told my self there got to be a reason the QSB uses those resistors.

I was going to try both 330ohm and 470ohms but when I found my local store sell these in packs of 10 which was like £2.50 each I only went with the 470ohm ...

 

[manwithoutname]

could i just cut the wired from the pin headers on my nand-x and solder the wires direct to the board? would this be a better option?

Yes you could. If you struggle don't keep trying to solder to the board you'll ruin it.

 

[Mrbuzz102]

i can solder wires no problems to the boards. its just the boards with the nand-x im having touble with. burned up a contact point on the jtag one and burned a few traces on the boards of my last one. went to a 15w solder iron to help prevent this as i used a 30w first time and messed it up.

 

[jfelding]

Thanks mwn, thats interesting .

And yeah, i mostly use wires, as i find it much easier and no need to wait for more qsbs/pinheaders when i run out. Especially when checking if a console is vulnerable or not (cut off dates), i dont wanna waste a nice qsb!

EDIT:
If you really want to keep your qsbs instead of wires, you can fix the traces with wires from motherboard point to qsb point/trace.

 

[Mrbuzz102]

manwithnoname. you have mail

thanks for all the info guys.

going to go try this with the wires cut from the nand-x dont want to waste these boards i have left untill i can get my soldering skills up a wee touch

 

[Mrbuzz102]

Another question. When soldering the Jag wires to DB1F1 can you solder the dioed to the bottom of the board? as there is a small amount of solder on the bottom. would this make a diffrence to soldering on the top side on the small hole at DB1F1?

on the back of the board its numbered FT1U2

anyone?

Cheers.

 

[manwithoutname]

You can solder to either points but be careful specially with the one beneath the board, they can easily lift .. You might want to consider using alternate points, easier and more stable.

 

[Mrbuzz102]

the alternet points look much easyer to do than the other ones. so i can skip soldering to DB1F1 alltogether . i noticed in the alternate one it says.

What this tutorial actually describes is the procedure on how to change the points to which the the JTAG Wires(Red and Yellow) connect to, and then procedure by which we will edit XeLL/XBR/freeboot to be able to coop with the changing of these points.

do i have to have freeboot installed on the board before i do this?? or can these jtag points be used from standard?

 

[manwithoutname]

Just solder to the new points and use the latest version of Jtag tool (make sure you select alternate points in jtag tool). No need to go through the whole procedure in the tutorial.

You need to obtain your CPU key first before you create and write Freeboot (freeboot won't work without the correct CPU key).

 

[Mrbuzz102]

so can i dump the nand without the jtag wires inplace first. then do them when i have the cpu key and the freeboot image made up? or do the jtag wires have to be in palce before u dump the nand.

cheers for all the advice

Buzz

 

[manwithoutname]

You don't need the jtag part for reading the NAND, however it's required for running xell to obtain the CPU key. So basically anything else the JTAG part is needed for apart from reading and writing the NAND. If you're 100% certain the console is jtaggable then might do the jtag part as well.