@Jz456games, I knocked a few of those tiny caps off myself. They are most likely the 0.1uF MLCC capacitors used for high frequency filtering on the CPU or RSX. There are 36x of them in parallel and they work in unison with the tokins in the second stage filter. Loosing a few isn't the end of the world. The console will probably operate normally. Maybe just clean the pad with desoldering braid to remove any remenants of the cap just in case.
worked on the two ps3s that have all the tokins removed. added arrays on top and bottom. the one that turned on last night still stays on but no hdmi...
Try using an AV cable plugged into a CRT, if you have one, or use a RetroTINK2x or something if not. I found this is the default video out after YLOD and multiple power cycles. It's annoying, but normal.
@jetblue and
@Jz456games , I did alot of research to determine the ideal capacitors to use. I found that an array of
18x 270uF 6mOhm ESR caps was the closest match for capacitance and ESR to a 4x tokin array. Oscilloscope measurements showed the noise to be lower, but they did not revive my YLOD A model.
@squeept and I went back and forth getting these measurements dialed in. To the point we're pretty sure that going significantly above or below 4800uF is a bad idea. That was something I predicted based on the circuit design, as the second stage filter is tuned to the noise frequency it's supposed to filter out. It's as if SONY's engineers knew what they were doing...I know! Shocking isn't it?
Also, if you remove one tokin, you should remove all of them. Their combined ESR is proportional to the number in the array. So if you remove one, the combined ESR is much Higher than before. Mixing non-identical capacitors doesn't calculate ESR the same way, you can't just divide the ESR by the number of caps. That only works if each cap is identical.. So it's best to leave them be, because they're fine (verified with an O-scope), or replace all of them with an array of identical caps whose combined specifications match the Tokin array.
@RIP-Felix Yeah, I know that these consoles can stop working after a job like this due previous damage on bgas or while it's been fixed, but like I said, both consoles were having delayed YLOD, I'm good detecting this kind of behaviour, and that was what they both were doing. I mentioned the causes of these both failures-> caps in bad state after installation (maybe due working in a place where they shouldn't be, I wanna know if this is true btw). And a NEC on RSX with flux inside in the other console.
I know how consoles with bgas problem behave too, and this isn't the case, as both consoles where running just fine after the NEC fix, I even have running one of these with TLOU while I'm writing this, and it has no problems of bga, never had them. Both are delidded btw.
Sorry, I misunderstood you (English). I see that you verified the caps failed afterwards. What were their values (uF, V, and ESR)? How many were in the array?
From reading this it's possible a tantalum cap can be damaged from voltage spikes. During testing I noticed an instantaneous voltage spike the moment I flipped the PWR rocker on. If the magnitude from this is high enough it can cause a transient instantaneous current:
Now, differential equations is where I draw the line! I do this stuff for fun, and dif-eq's is not what I had in mind. So I'll use the AVX equation instead:
For the cap array I used
I_peak = (1.1 x 2.5V) / (0.45 + 0.006 Oms) =
6.03A
Now, that 6 Amps is certainly less than these chips can draw during normal operation, but you have to multiply that I_peak by the number of capacitors in the array, since they share that current equally in parallel. In other words, it would take a peak current of 109.8 Amps for each capacitor to see 6.1 A worth of current across it. In the US, residential circuit breakers will not allow a sustained current above 16A, and it would probably trip long before an instantaneous current of 109.8 amps. But that just how my array calculates.
Now if you leave some tokens and have a few tantalums, that changes the equations for how much surge current the tantalum might be exposed to. Perhaps this results in burning it out. Again, this is why you should either replace bad tokins with new tokens or replace all of them with tantalum. No mixing! These equations are hard enough to figure out when all the caps are the same.
There are other failure examples in that link too, this is just one possibility.
About your console with YLOD due PS2 emulation, I only can say that running a PS2 game on a BC is quite risky, 'cause you can't monitor the right temps on the E.E, and this isn't a PS2, it's a PS3 with a PS2 inside, there's more temperature around the mobo and why I believe a thermal pad for the IHS isn't enough. Even if you put the fan at 60%, we don't know how cool is the E.E running.
Plus, A LOT of people in forum had and have problem with this, and that's not a surprise anymore, something is happening either with both E.E/GS, some other chip related in that area or even bgas.
I mean, yeah. The PS2 chip has a BGA too, but I didn't think it got anywhere near hot enought to worry about. Not like the RSX and all of it's thermal cycles. Still, I doubt that's the cause. I'm still thinking it's the BGA on the RSX, which I haven't attempted to reball yet. Still working up the courage for a second attempt, which I don't have high hopes for going successfully. Practice make perfect, but I've only tried once before.
Both diagrams are almost identical for RSX and CELL, and NEC's jumpers are coils of unknown value...
I think they are just indicating that the Tokins have some internal inductance.
People already mentioned that using thinner wires could provoke a burnt on them, so you will only know by testing the console during hours of heavy gaming.
Yeah I tried a single 22AWG solid core that burnt to a crisp. Using 6 works fine (3 on each side).
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