This is Why You NEVER Ignore Bad Capacitors!

[S_S]

Re: This is Why You NEVER Ignore Bad Capacitors!

it's not a design fault - supercaps do that.

you can just leave it out on a 1.0 - 1.5 series board.
on a 1.6 board you need "something" or it wont start, so i fit a low impedence 220uf cap.

I read that the capacitor fails prematurely because it's undersized or the circuit isn't built correctly.

(original XBox)

If it's just a case of these capacitors having a lifespan limit then Microsoft should have warned buyers in the manual in a prominent location or, better yet, should have figured out another way to keep time — like a battery.

[stj]

Re: This is Why You NEVER Ignore Bad Capacitors!

supercaps have a life rated in charge/discharge cycles,
m$ should have fucking known from the datasheets that they wouldnt last a year!!

more importantly, they should have not bothered with an RTC,
it's a games rig - it does not need to know the date or time.
hell, only the m$ dashboard that nobody even uses anymore even uses that data!!

[eccerr0r]

Re: This is Why You NEVER Ignore Bad Capacitors!

how many charge/discharge cycles should a EDLC sustain? That doesn't sound right, if it only can take 1000 cycles or so, that's no better than a rechargeable battery?

They probably have the RTC for DRM/key exchange or something for encryption. Maybe use it to seed the network prior to network time becoming available... Just speculating...

[Stefan Payne]

Re: This is Why You NEVER Ignore Bad Capacitors!

If it's the first XBox with the 733MHz Intel CPU and the nForce shitset, than probably because it's a PC in console format.
And not that much custom stuff compared to modern consoles...

Modern consoles are totally custom, specified by the console seller....

[gryffinwings]

Re: This is Why You NEVER Ignore Bad Capacitors!

These images are making me really consider not putting off replacing caps that are going bad in my computer, here are some Nichicon 3300uF 6.3v 105 H0139 HM series capacitors on my Asus A7V266-E motherboard that are in need of replacement. Definitely looking at putting in some polymer caps in there.

[Behemot]

Re: This is Why You NEVER Ignore Bad Capacitors!

Gonna have to try polymers, it may or may not work. But 39th week of 2001 is among the years of bad HN, HM caps so nothing surprising there.

[PeteS in CA]

Re: This is Why You NEVER Ignore Bad Capacitors!

Gonna have to try polymers, it may or may not work. But 39th week of 2001 is among the years of bad HN, HM caps so nothing surprising there.

Not contradicting, but a 17 year life isn't exactly awful.

[Behemot]

Re: This is Why You NEVER Ignore Bad Capacitors!

Yep, likely just a light use most of the time.

[Stefan Payne]

Re: This is Why You NEVER Ignore Bad Capacitors!

These images are making me really consider not putting off replacing caps that are going bad in my computer, here are some Nichicon 3300uF 6.3v 105 H0139 HM series capacitors on my Asus A7V266-E motherboard that are in need of replacement. Definitely looking at putting in some polymer caps in there.

1) the Pics don't work (no more?)
2) In that case you could eventually try ramming in 12,5mm 16V/3300uF Panasonic FM. Those have similar or the same value than the Nichicon. Problem: they are way bigger. And the only caps, to my knowledge, that are widely available and can be used as replacement of Nippon Chemicon KZG and similar...

Though it needs some creativity as the caps are 25% bigger...

[Behemot]

Re: This is Why You NEVER Ignore Bad Capacitors!

Suncon still produces WG so 3300/6.3 are still easily available, plus I got some stock of Rubies MFZ 2700/6.3.

[Topcat]

Re: This is Why You NEVER Ignore Bad Capacitors!

Suncon still produces WG so 3300/6.3 are still easily available

I'm not sure where you're getting them, but they're nowhere to be found with my regular haunts.

[Behemot]

Re: This is Why You NEVER Ignore Bad Capacitors!

Wanna some? Should have some of them moneiz around the end of the year so I could actually finally order some (they still want payment in advance) Will likely start with 1800/6.3 D8 though since I have those D10 MFZ which are more than fine for any board.

[Escribblings]

Re: This is Why You NEVER Ignore Bad Capacitors!

This is what happens when you release the magic smoke :'(

[RJARRRPCGP]

Re: This is Why You NEVER Ignore Bad Capacitors!

If it's the first XBox with the 733MHz Intel CPU and the nForce shitset, than probably because it's a PC in console format.
And not that much custom stuff compared to modern consoles...

Modern consoles are totally custom, specified by the console seller....

Ironically, minus cap problems, the PC-based version 1x XBoxes seem to be much more reliable than an XBox 360, especially the early XBox 360s!

[stj]

Re: This is Why You NEVER Ignore Bad Capacitors!

the 360 biggest problem is again the clowns at m$ hardware center.
they put an undersized heatsink on the gpu and then put a dvd drive above it.

forget all the crap you hear about washers, screw-kits, reflow etc.
all you need to do is remove the dvd drive and put a spare cpu cooler on the gpu and they run fine!!

[RJARRRPCGP]

Re: This is Why You NEVER Ignore Bad Capacitors!

the 360 biggest problem is again the clowns at m$ hardware center.
they put an undersized heatsink on the gpu and then put a dvd drive above it.

forget all the crap you hear about washers, screw-kits, reflow etc.
all you need to do is remove the dvd drive and put a spare cpu cooler on the gpu and they run fine!!

Well, like with today's video cards with turning up the fan, if that was done when it was brand new, then the solder probably wouldn't crack or move.

[Heihachi_73]

Re: This is Why You NEVER Ignore Bad Capacitors!

An old news article, but still relevant...

https://wongm.com/2015/01/melbourne-...iemens-trains/

(Note, the blog as a link to articles from The Age, which is a paywalled news site, if you absolutely need to click on them, open the links in private/incognito mode to get around it)

[andrewsawesomr]

Re: This is Why You NEVER Ignore Bad Capacitors!

I'm not sure where you're getting them, but they're nowhere to be found with my regular haunts.

They're available at LCSC (https://www.lcsc.com/mobile/product-...G_C242095.html)