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Monday, March 17, 2014

Problem with post fix QSB Xbox 360E Corona v6

I have been missing for some times around here... but I've been busy with work and a few little projects I've been trying to do for friends.

One of the problems I encountered was a Xbox 360E Corona v6  with RROD... the code in trouble was 4431 tho a lot of people say it's junk after this code and should be scrapped the one we are talking about is not:) and still working. It got the problem after an RGH, my friend that did the RGH did it for the first time and he bought a kit of Ebay with a solder gun, solder, solder paste, and other bits... to get the story short he had some bad connections on the QSB surrounding the processor which after a couple of days of working like a charm started developing a bad case of the RROD*:).


*RROD = red ring of death (for the unknowing)

Said and done opened the pacient up and re-did all the solder joints started with the PROTO V2 and went down on the processor where I saw the culprit.
What we have there in the picture below are some class A cold solder joints (from what I've noticed the solder he got in that kit was lead free solder that melts at a higher temperature which his soldering iron didn't provide), it happened to the best of us:)


 Tried to clean everything up and desolder the QSB to re-apply it, didn't went that good and I got away with a few ripped pads on the QSB and a damaged capacitor. But there is always a silver lining the console was working and had no RROD. That's where the final part of the project went out trying to find out what kind of a capacitor was on the board.
The one I damaged was lucky C5D4, C5D13 got away un-scarred, so that is good right. But there was nowhere to find a schematic of the board on the internet being a corona and a V6, actually there are no schamatics for the Xbox 360 boards the last one available being the Falcon. I will post a bit lower the schematics for the Xbox 360 Xenon board and Falcon.

Ok, so I went ahead and switched to the second phase of the project and that is desoldering a good capacitor from the board somewhere in between C5D1 and C5D14 from what I noticed in the schematics for the other boards they are all the same, the schematics for the old processor and GPU show them being a 4.7uF at 6.3V and 10% tolerance capacitor. But as it is the CPU and GPU changed to an APU and we can't rely on those schematics.

Said and done got one of them desoldered from the motherboard and soldered it to a perfboard with a couple of wires as leads and tested it out on a multimeter that isn't an expensive one but gives a good enough reading.

Said and done got it connected and read out a 4.39 as it can be seen in the pictures which is withing the 10% tolerance of the capacitor. Searched the internet if there where other capacitors with a different capacity rating around the value that my multimeter was showing with a 0603 package ( the size of the capacitor), none were found except for the one I was interested in which is the 0603 4.7uF, 6.3V and 10% tolerance. That seems to be our winner and the capacitors I ordered. Seems the console is working without the capacitor but to be sure and safe I ordered a few of them and I will replace them. I saw this question alot around the internet and no answer whatsoever.
The capacitors on the Corona V1, V2, V3, V4, V5, V6, Trinity, Falcon, Xenon with the code C5D1, C5D2, C5D3, C5D4, C5D5, C5D6, C5D7, C5D8, C5D9, C5D510, C5D11,C5D12, C5D13, C5D14 = 4.7uF, 6.3V, 10% tolerance.

Schematics for Falcon and Xenon as promised HERE

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