Benachrichtigungen

Heated up to 200 slowly, let it cool. no popcorning this time round. assembled everything.. still ylod. Now everything will go into the bin, had I done it at first I would have saved myself lots of energy, and money.

further to that I took the rsx chip with me to work and baked it in an oven drier for approx 5hrs at 120degc, then placed it in a bag with silica gel bags and taped to reduce moisture absorption. I read that that this greatly reduces popcorning risk.

I received another chip today, this time from elitasia. red-gnd is 1.5ohms, the other colours are all over 200K. I am thinking this is a good chip, and I was right on sending the other chip back. I will be trying to solder it tomorrow as i have the gun. what do you think Takeshi?

well 12A is a lot of current even for a power tool, let alone for an electronic circuit of that size. I don't think it is wise to try it:

1)you will solder it, heating the mainboard (I think you are giving the mainboard a really hard time each time you heat it)
2)you will have to take it off again and reclean, risking of lifting more pads
3) it will be more difficult for the seller to accept back

Hi Takeshi, I received the chip today and tested pinouts AD23-AD24 and found them to be 0 ohms. I guess I would be right to say that there is no way this chip would work right?I already contacted the seller to advise him of that.

eh ok, so you should check the 8 colours to grnd. I presume that I don't have to check every single one because they are connected in parallel right? the value should be at least 2ohms+multimeter/probes resistance to be good.

Thanks Takeshi very kind and informative of you. Where I should measure and what (approximate) values should I expect?

here are the chip pinouts

http://imageshack.us/f/838/rsxgridrefpowerpinout.png

is it possible to have the pinout numbers on the rsx which ones to test for ohmage?

yes ok that part I understood. but pomts 1,2 and 5 are pointing to areas where there are no contacts.

Is there a way to get the pinouts of the GPU to check? eg G7 to ground, AH12 to gnd and so on?

ok you told me to follow the conductor to the pad. sorry my bad

but still in the picture there are arrows which are pointing to places on the motherboard where there are no contacts eg:1,2,5

I am seeing the guide which unfortunately is in German. I translated it with google but it still does not make much sense. How come the arrows are pointing to the motherboard? that means that I have to solder the new rsx before testing it? in that case I might as well assemble the console. I wish to test the rsx before soldering.

To prevent popcorning, heat up the mainboard (without BGA and flux) up to ~130°C and hold this temperature for an houre.

I was saying I am afraid of the RSX popcorning not the mainboard.

and another thing, is there a way to check if an RSX is good or not before installing?

Hi Takeshi what I was asking is:

Would it work if I heat the mainboard to 200deg then put the BGA on it and let it settle ther? Therefore the contacts of the preballed BGA will touch the mainboard which is at 200 and melt Nad the BGA will never get heated over directly. I just heat the mainboard from bottom and when it reaches 200 I put the BGA (RSX) on it and never heat the BGA.

Here is an image of the board at the moment. I did clean it more like you (Takeshi)advised circled in red are the missing pads and the silver lines is to where they should connect. kindly advise on the method I mentioned before of heating only the motherboard and if this board is clean enough in your opinion or needs more

http://img339.imageshack.us/img339/6456/boardm.jpg