BGA chip questions

[Dan Collins]

New question:
Can the G6150 replace the G6100? Tried one and it did not work.

[uncleseb]

hello ,
not interchangeable.

[Dan Collins]

New question:
Anyone know a reliable source for the NF-G6150-N-A2 BGA's

I am getting very frustrated with the Chinese sending me reballs when they sell as new. I have lost a lot of money sending 5 lots back because of this. I can't find new product anymore that I can trust . They are real slick too reusing factory packaging and grouping date codes, but the signs of reballing cannot hide from a video microscope. With a reball you can see many signs of solder removal in the form of scratches and residue. This does not exist when the chips are actually new.

I am sorry, Chinese reballs are junk. I tried them and get a 50% yield on them and the failure rate is high when they do work. I am better off reflowing then wasting my money on buying the Chinese junk. Oh, can't blame it all on the Chinese. One lot was from Canada, but he got them from China. Yeah, I know that is when they are produced and factory stocked.

Can anyone help me out here?

[pentu]

Dan,

i am buying with few suppliers (indians staying in china) from china till recently i got new G6150-N-A2 chips but they say new chips are not available now, they offered me '09' year code dated reballed chips, i got the stock today 50 nos it looks neat and good, i have sent 25 nos to my client i will get feed back within couple of days, i will post the results.

you can also try with Taiwan suppliers, but high price and purchase quantity should be more.

thanks

[Dan Collins]

I also bought reballed 09 date code chips. Gone through 30 of them and only 2 worked. As soon as you get to 220C they blister. I think too much heat was applied during the reball process and destroyed the chips. That is the problem when buying reballed chips. You are trusting that the reball process was done correctly. Usually I bet not. They only care if the chips look good, not if they actually work. If they reballed them using leaded solder, I would probably have had less of an issue with them.

So you say the Taiwan sources are more trustworthy. I also see G6150 sellers from Hong Kong. Anyone had luck with those suppliers?

[TriMesh]

Originally Posted by Dan Collins

I also bought reballed 09 date code chips. Gone through 30 of them and only 2 worked. As soon as you get to 220C they blister. I think too much heat was applied during the reball process and destroyed the chips. That is the problem when buying reballed chips. You are trusting that the reball process was done correctly. Usually I bet not. They only care if the chips look good, not if they actually work. If they reballed them using leaded solder, I would probably have had less of an issue with them.

So you say the Taiwan sources are more trustworthy. I also see G6150 sellers from Hong Kong. Anyone had luck with those suppliers?

In my experience, all the sellers in HK just buy product from the suppliers in Shenzhen and mark it up. The only thing you might get is a bit more QA, but that's generally restricted to visual inspection.

[linears4]

hi, i bougt 10 pcs of g6150 datacode 09, new ones... from this guy:

10pcs New nVIDIA BGA IC Chipset NF G6150 N A2 Date 09+ su eBay.it Electronic Components, Electrical Test Equipment, Business Industrial

this was almost 3 months ago, i used them all and, i got 100% working, and zero return.

in the same period i bought also 15 spp100 nvidia bga datacode 06, selled has new but they was reballed, from another seller. on this lot i had few problems, but they where accepptable... 100% working, and about 3 returns.

in my experience i can say that reballed chips can be good... or bad.. it depends by the seller. some seller sells true reballed chip, not cominig from deads motherboards, and generally with these ones the results are good, very few returns, about 10%.

others sells very cheap junk...

if you want real new ones, start from asking datacode 09... every earliers datacodes are not new...no way, and yes, it can't be else, as it would be very very economically strange that a 06 or 07 chip would stay in stock until 2010...

nvidia spp100 datacode 09 are very hard to find...i'm managing to have some of these, but i will tell to you more in the next days...

and, last thing, i alaways reball with leaded balls. even the new ones. soldering lead free with jovy it is not safely possibile, at my opinion. lead free reliable bga soldering is not a joke..

[Dan Collins]

NEW question.

When replacing lead free solder balls with leaded, wouldn't there be an issue with the lead free solder coating on the pads turning liquidus at the lower temperatures creating a barrier between the leaded solder ball and the pad?

Maybe we should apply some leaded solder to a wick and pass it over the pads to blend the solders first. Seems that the lead free solder coat on the pad may not turn totally liquid at leaded temperatures. And the whole point of using the leaded is so we can use lower temperatures to protect the devices and circuit board.

Any thoughts on this?

Dan

[kerim92]

very cool thread.

i have dv6000 board.
i changed gf-7200 chipset to 7400 not worked?

and i have question:
can i change nf-spp100-n-a2 to 6100 or 6150?

i have a board on it nq82910gml chipset.
i can not found that chipset.. i bought nq82915gm chipset can i change i910 to i915?

will work?

thanks a lot for answers

[uncleseb]

hi , G7200 can replace by GF7300

[kerim92]

i reworked on board

i changed i910 to i915.. cool it worked.

but already don't have solution spp-100 to 6150?

will it work?

or any1 have spp-100 and 6150 datasheet?

thnx

[kerim92]

if i remove 7200 chip on dv6000 board?

i think board have to work and show video is it right?

[Dan Collins]

There are other changes to do if you want to remove GO7200 and use G6150 as video.
Never tried replacing SPP100 with G6150. This would be good to know this info if anyone has had success with this.
The motherboard BIOS may be a factor in the choice of video chips. I do know that the motherboard circuits are identical with different video layouts, but there are other component changes as well, resistors and caps. Much effort in doing this. Really not worth the time for me.

TriMesh - I am still waiting for my test socket. It is expected very soon. Had to have it custom built. I will post pictures as soon as I have it setup.

[kerim92]

i removed go-7200

and changed spp100 to g6150.

it is working!!!

ref: dv6000 motherboard with spp100 (same motherboard with same cpu) compaq v6000 with 6150.

[kerim92]

my another problem:

i have vgn-fs215 motherboard.

tested cpu and rams with another board.

the problem is, motherboard not power on. i measured 8v power button.

everythink lookslike fine.

no shortcircuit on board components.

i make some hotair to hn82801fb (sl89k)

doesnt matter.

i know this is sony's classic problem. but i can not find problem yet.
i will rework on that board but please tell me your idea be4 working on it.

what do u think about this problem?