recommend: a hot air gun for gpu reflow?

[ChaosLegionnaire]

as above. any ebay or aliexpress links to share for one?

[diif]

Re: recommend: a hot air gun for gpu reflow?

Whatever the hot air station you also want to provide some bottom heat to the board. I use my bga rework station but bottom heaters are available separately. This will reduce the chance of thermal shock. You don't want the outer parts of the board at room temperature whilst the GPU is 220ish degrees centrigarade.

[dicky96]

Re: recommend: a hot air gun for gpu reflow?

For BGA rework I would suggest something like this http://www.ebay.co.uk/itm/SALE-T862-...3D121345397153

Or this

http://www.ebay.co.uk/itm/BGA-IRDA-W...3D121345397153


dicky

[Deusjevoo]

Re: recommend: a hot air gun for gpu reflow?

For BGA rework I would suggest something like this http://www.ebay.co.uk/itm/SALE-T862-...3D121345397153

Or this

http://www.ebay.co.uk/itm/BGA-IRDA-W...3D121345397153
dicky

Those are unsuited for GPU BGA rework.
To small preheater, top heater is a bulb, low power.
Waste of money.

[Stefan Payne]

Re: recommend: a hot air gun for gpu reflow?

Yo don't reflow BGA Chips, you replace them!
For 'Reflow' you don't need good equipment, maybe even a hair dryer is enough. And there is only ONE reason to do that: Data Recovery! You do that to recover data from a machine you can't access otherwise.

More Information:
https://www.youtube.com/watch?v=1AcEt073Uds
https://www.youtube.com/watch?v=E9aZZxNptp0
https://www.youtube.com/watch?v=w57ObM3pYXw

[diif]

Re: recommend: a hot air gun for gpu reflow?

Yo don't reflow BGA Chips, you replace them!
For 'Reflow' you don't need good equipment, maybe even a hair dryer is enough. And there is only ONE reason to do that: Data Recovery! You do that to recover data from a machine you can't access otherwise.

More Information:
https://www.youtube.com/watch?v=1AcEt073Uds
https://www.youtube.com/watch?v=E9aZZxNptp0
https://www.youtube.com/watch?v=w57ObM3pYXw

Louis is refering to the Nvidia chips that are known to be faulty.
There are plenty of chips that don't fail, in TVs, consoles and laptops and more. They can all benefit from a reflow. I'm pretty sure a hairdryer is not going to be able to heat chips to 220c. If a reflow fails then it's BGA replacement time.

[Deusjevoo]

Re: recommend: a hot air gun for gpu reflow?

Yo don't reflow BGA Chips, you replace them!
For 'Reflow' you don't need good equipment, maybe even a hair dryer is enough. And there is only ONE reason to do that: Data Recovery! You do that to recover data from a machine you can't access otherwise.

More Information:
https://www.youtube.com/watch?v=1AcEt073Uds
https://www.youtube.com/watch?v=E9aZZxNptp0
https://www.youtube.com/watch?v=w57ObM3pYXw

Good luck with a hair dryer trying to get lead free solder to melt.
Really wonder how long those hair dryer "reflows" really last?
Like diff just mentioned, if the chip itself is bad, better replace it.
But even those nVidia chips can work for years again after a reflow or reball, and I do speak of experience with devices working over 4 year again after a reflow.
Not bad I guess?
Ofcourse, I talk about a REAL REFLOW using a bga rework station and a controlled process.
And yes, I also reball or replace them if necessary, not only reflow.