Good continuity solder but cannot read NAND

[nickds]

Hello, this is my first post so please be kind and hello all.

I must stress I have done a lot of google and forum searching with this question and I have read the sticky above, but I was still curious to ask about the situation I am in.

I used the QSB supplied with the NAND-X and soldered them on this morning.

I got the message about cannot detect a device, which suggests bad soldering, so I got my multimeter out and thought I would do some continuity checking to make sure there is no bridging between points with solder and that the solder is making a good connection with the QSB and the ring on the Xbox motherboard. Every thing was fine and had a good connection.

The only problem I did occur was that there was a connection between two points, which I have highlighted in the pictures below. I got a reading between the two on the meter. Are they supposed to be connected or is that wrong?

Some of the soldering is a complete mess so I must apolagize.

I hope someone can point out anything thats wrong, I know parts of the solder are awful.

Many thanks,
Nick

 

[playingmax]

for reading the nand just do the qsb (direct wire) and read this
http://team-xecuter.com/forums/showthread.php?t=54423

 

[seanr28]

I personnally would ditch the QSBs, I have had a few instenses like this when using them and I have been soldering things like this for years with very few problems. Its far more reliable to use wires directly on the board, Just out of curiosity did you clean the solder pads on the board with a fibre pen before fitting the QSBs?

 

[nickds]

Well I did something rather foolish I realise now, I used a dremel with a fine emery attachment to remove some of the solder from a previous attempt (I bought this console from ebay, looks like someones already tried to jtag it). I dont know whether my abrasion to the motherboard over the contacts would have damaged any connections? Are they printed on the surface of the motherboard or are they recessed? Another foolish thing I have done is super glued the QSB's onto the motherboard, this story just gets worse.

Is there any way out of this horrible predicament I have got myself into do you think?

Many thanks,
Nick

 

[bandit123]

maybe use the direct wires and use the point under the motherboard instead??

 

[seanr28]

maybe use the direct wires and use the point under the motherboard instead??

I agree, use the underside of the board for all connections,easier anyway as there are no components in the way.

 

[nickds]

Would it have been okay to use fine sand paper to clean up the contacts on the surface?

And does anyone know how I can remove superglue? If i pull the QSB's off the motherboard will it rip other things off too?

 

[DelinQuent]

My soldering was FAR worse than what you've done there, I was able to read and write to the nand without any difficulty. I assume you've tried adjusting the switch on the QSB labeled "JTAG", yes?

 

[seanr28]

My soldering was FAR worse than what you've done there, I was able to read and write to the nand without any difficulty. I assume you've tried adjusting the switch on the QSB labeled "JTAG", yes?

That wont help! The Jtag qsb has nothing to do with reading the nand!

 

[Martin C]

It's possible you've damaged a trace somewhere along the line, especially if you've been using DIY hardware tools to clean the board. Remove the QSBs and clean up with flux and desoldering braid. Then re-take pictures using macro-zoom.

 

[nickds]

It's possible you've damaged a trace somewhere along the line, especially if you've been using DIY hardware tools to clean the board.

I used a dremal (small handheld grinder with fine emery grit paper attachment) on the surfaces of where the pin headers would be fitted. I dont know if this is enough to cause irreversible damage, I hope not?

Remove the QSBs and clean up with flux and desoldering braid.

I used superglue to attach the QSB to the motherboard, god knows why know as they came with sticky. I dont know if I can pry them off the motherboard without damaging/pulling off components.

I guess I have may have messed up big time here

Thanks,
Nick

 

[Martin C]

You might want to consider sending it to someone for sorting out.

 

[Fisticuffs]

You need to get some desoldering braid (radio shack)and remove the solder, Then you could try soaking the edge of the board in a small bucket with rubbing alcohol where the QSB's are, Get the 90% strength, (Walmart $2 32oz bottle) and slowly and gently pull on them with a thin but strong piece of plastic while soaking, But probably the best thing you can do is send it to someone who can repair it

 

[Martin C]

You need to get some desoldering braid (radio shack)and remove the solder, Then you could try soaking the edge of the board in a small bucket with rubbing alcohol where the QSB's are, Get the 90% strength, (Walmart $2 32oz bottle) and slowly and gently pull on them with a thin but strong piece of plastic while soaking, But probably the best thing you can do is send it to someone who can repair it

I already have an image in my head of QSB points not being desoldered properly and the traces being ripped off the board......

 

[nickds]

Can you recommend anyone in the UK who would have a look?

Many thanks

 

[Martin C]

I'll certainly take a look for you. Drop me a PM or email if you're interested.


Sent from my iPad using Tapatalk.

 

[seanr28]

whre abouts are you locted in the Uk?

 

[nickds]

Im from Kettering so happy to drive to anyone nearby?

 

[seanr28]

where is kettering? Im in kent, not far from dartford if thats any help to you

 

[nickds]

Kettering is near Northampton, about 45mins from Peterborough also, if anyone is around there it would be nice