Nice re balling those manually. I thought I was crazy when took hours to do one on a phone as no template available to recover data off of it and had to transfer over to different board. It took me a few hours, I use to repair game consoles and laptop boards when it was still profitable and pain in butt. I do recommend using a bottom pre heater as board could have warp otherwise as I screw up a couple of boards that way. Still nice job and works. Love that scope as bought the 350mhz version recently.
@@fixthetempo7276 All HP, Agilent, Keysight or whatever you want to call them are a complete piece of shit. I see Us$100k Agilent scope with problems, I am in electronics for more than 40 years, I can say "if you don't want any problem stay away from HP products" Cheers.
thank you very much! usually i recieve units like this with NAND firmware problem (can be solved by reflashing the nand memory + spi flash loader) , but that one was really unusual.
@@fixthetempo7276 I also trying to repair a Agilent 7000A series scope. Can you give me an advice on that? Esspecially regarding boot (loop) problem and nand flash?
@@cnst6695 Hi! Unfortunately i dont have such expirience on 7000 series like i have on 2000/3000/4000. But if you have a boot loop problem i think there is a 2 ways to fix it. 1st is to transfer nand memory + fpga memory from burned motherboard ( i mean that this board can be turned on , but there is a defective channel(s) you cant fix) to the boot loop board, as i did in this video. And the second is to reflash the nand memory chip with programmer, but it might be useless if firmware installed in the chip dont match with fpga configuration version. It seems to me that i have 6000 or 7000 defective motherboard in my junk stuff, i will explore it as soon as possible and comment the results here. Good luck with the repair!
@@cnst6695 yep , this is your only chances to fix it. Programmed boot flash on 7000A/B scopes is SPANSION S29GL128P10TFI01. You need a dump to flash it in the new IC with programmer or you need a good working FLASH + FPGA from another board.
@@fixthetempo7276 Thanks for your fast answer and your great help so far! Yes, I found the SPANSION Chip in my device. To flash a new IC with a programmer is also what I've read about. The big problem is to get a dump ;-) To get the IC and a programmer wouldn't be a problem at all. Maybe you can contact me via cnst "at" quantentunnel.de
Great job, even though I doubt that all 3 chips could be bad simultaneusly...a better fault analysis might have spared you a lot of dangerous soldering job. Anyway, you have managed pretty well the risk. Regards from Italy.
at 4:30 on the defective board did you actually check the serial debug port log to see what errors appear in there? I mean were you really sure the FPGA was bad? how? your board seem to stop booting at a very very early stage, at that point I dont think FPGA has anything to do yet. it may have been the boot loader was corrupted or just the classic NAND corruption and both can be fixed without de soldering o many BGA chips....
nice job but I highly doubt the FPGA was bad at all and even the NAND. It might have been corrupted which is easy to fix. The SPI flash could also be programmed in-circuit although I dont think it was bad either. You should have looked at the serial debug port first to see what th e problem is. But in the end it worked out :-) your skill with the BGA was nice
nono my friend . it is all about the experience . i had to repair 150+ of this units. And some of them, approx 1 of 10 had problems with FPGA chip. thats is why i made rhis video
Nice job!! I can't understand, my bad, what you say about the liquid in the syringe, "metal ..." Isn,t it fluxant? When you prepare the BGA balls seems that each ball stop and stay exactly on the right point. Which is the "glue" used to keep the ball attached? Thanks
The "glue" is flux paste . You need to apply it very thin layer on the BGA chip. In this way you can easily move the balls on the BGA chip any way you need and them simply solder them to the chip. I use Flux plus 6-412-a paste.
That's some ghetto soldering! Congrtz on your success! I agree with the previous comments on what FPGA chip is most probably didn't need to be replaced.
Looking at the mainboard marked as BAD, there is an 8-pin SOIC chip just below, and a bit left, the big 20-pin white socket. The chip's silkscreen is U3602. What chip is this? I'd like to know its code, if someone has a mainboard in hands and can read it. Thanks
@@fixthetempo7276 I have to decide if to buy or not a non-working Keysight 3024 unit. Not much information about it. It doesn't power up and the chip we talked about before had flamed for sure. I have good fixing skill but no experience with Keysight nor any Keysight spare parts available on my desk. From your video I think that the chip is involved in digital supply stabilization because is near to a linear regulator but without the part-code I can't say that for sure. Based on chip-code I'll try to understand what caused the problem and if the source of the fail had passed through the front-end or not. Difficult analyses in any case because I have not the damaged scope in my hands.
