Welcome - AND - fecked up SPI chip solder points


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9 years 6 days ago #393 by Wax
Hi Everyone.

I've managed to mess up Macbook Pro by removing the SPI chip and unfortunately a few solder points came off..... does anyone know alternative points I could solder to, as I could use some kynar wire to extend the legs of the chip. The board being black, makes it hard to trace some of the points.... any help appreciated

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9 years 4 days ago #396 by thaGH05T
Well the best bet is to follow your traces back enough to retrace. But if that's not possible you may be out of luck. Please take HD pictures of the board front and back so I can get a good understanding of what you have to work with. Also please provide your serial number and specs so I can get the exact model.

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9 years 4 days ago #397 by Wax
Hi Ghost, Thats exactly what I did..... I haven't been repairing surface mount stuff in quite some years now, and honestly, I think I applied too much heat to the board overall...


I think I've traced most points to an alternative point, except one.... but I could have that one sorted.... gonna try sometime this week as Ive got a hectic schedule. There is not much support for this kind of stuff around the Ireland area, and I came across your site by accident.

I'll post the board and get your thoughts on things, if your happy enough with that! Maybe just to corroborate my thinking.


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9 years 4 days ago #398 by Wax
Hi Ghost, Thats exactly what I did..... I haven't been repairing surface mount stuff in quite some years now, and honestly, I think I applied too much heat to the board overall...


I think I've traced most points to an alternative point, except one.... but I could have that one sorted.... gonna try sometime this week as Ive got a hectic schedule. There is not much support for this kind of stuff around the Ireland area, and I came across your site by accident.

I'll post the board and get your thoughts on things, if your happy enough with that! Maybe just to corroborate my thinking.





BTW, I took pic through 10x lighted magnification glass

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9 years 4 days ago #399 by thaGH05T
All but 1 looks like you could fill in with solder and it would work. I see a couple traces leading to vias but on multi layer boards its hard to tell where they go next. Your best bet is to gently start removing solder mask.
The following user(s) said Thank You: Wax

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9 years 4 days ago #401 by codefiend
i had a similar problem with an ipod 3rd gen, what you can do is, trace the connection on the board to the other end, gently scrape off the solder mask and solder a piece of copper wire to it, and then continue to join the other point where you are soldering, also if the connection is close enough just scrape off the solder mask protecting the copper then apply some Electrically Conductive Epoxy and solder to that.
The following user(s) said Thank You: Wax

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9 years 4 days ago #402 by Wax
Many thanks all for your help.... I think I may have it sorted (fingers crossed)

Ive managed to download the relevant firmware file for my model..... one quick question. I'm using a cheapie SkyPro SPI programmer which is compatible with this chip.

When I write the fresh firmware (with serial number entered in relevant spot) do I just dump it back to ROM as it is, or does it need converting to some kind of format?

Sorry in advance, if these questions seem lame, but I'm outta touch for ages with this, and relatively new with MAC's

regards!

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9 years 4 days ago #404 by Kiiinglouie
omg sorry dude but dam you fucked up that board
clean up as much as possible to see if i can see the traces it will take alot of work but im sure it can be done
next time use kingbo flux great for reflowing and removing smd ic's
...........ouch

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9 years 4 days ago #409 by thaGH05T
Ha, yea and a bit of Kapton tape.

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9 years 4 days ago #410 by Kiiinglouie
i dont use that tape anymore but it does help in tight spots like that

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9 years 4 days ago #411 by thaGH05T
After malting off small parts at reflow point, I have learned Kapton tape decreases the temp by 5-6 degrees which is enough to not reflow the stuff you don't intend to. My two cents anyways.

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9 years 4 days ago #412 by thaGH05T
You just replied to a post and I do not see u in chat??? whats up with that?

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9 years 4 days ago #413 by Kiiinglouie
i have been doing reflowing among other things for many years i can solder like no ones business even drunk ha
hell even better use kingbo flux and some stuff called chip quik stays molten long enough to hit all legs of the ic allowing you to remove it if you only have a solder iron
i have a rework station so not really needed but that stuff does it job and does it well
my chat was offline sent you a message gh0st

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9 years 3 days ago - 9 years 3 days ago #416 by Wax
:sick:

Fucked up is an understatement...... one thing I does got.... it's determination..... It'll prolly take me a few weeks, but I think I'll get there in the end.... with a lot less hair.....


update: I am getting the IC programming ok now..... so it's good to go in.....
Last edit: 9 years 3 days ago by Wax.

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9 years 3 days ago #423 by thaGH05T
Be very careful, you have just enough left to get it to work. I see potential in that pic.

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9 years 1 day ago #428 by Wax
Thanks for all your comments folks!

I've drawn, what I think, is a possible trace of alternative points that I could solder to...

the point with the "?" is the one I'm unsure of....

I'll upload a reading I'm getting off the IC now and if someone has time, I'd be grateful if they could confirm that it's OK

thanks again, in advance
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9 years 1 day ago #429 by thaGH05T
As long as the colored lines correspond to the actual traces you should be good. The unknown pad may lead to a different layer so if possible try testing continuity to different points on the board.

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9 years 1 day ago #430 by Wax
I cleaned the part of board with isopropyl alcohol and took a high-res pic with flash and guess what showed up.....

a really neat look at what the naked eye cannot see..... I think I might have something to go on here, so long as I'm careful.

thanks all, esp. ThaGhost for Advice
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9 years 1 day ago #434 by thaGH05T
Nice find I cant wait to see the results. Keep us posted!

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8 years 10 months ago - 8 years 10 months ago #603 by keyboardhn

Aparentemente no fue demasiado calor. sino lo contrario. Muy poco calor. Antes de probar esos contactos basado en las lineas, deberias de medir continuidad, con tester entre los puntos y estaƱar de nuevo o usar un cable muy fino de cobre de 0.10 mm para hacer un puente entre contactos.



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Last edit: 8 years 10 months ago by keyboardhn.

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