Electrolytics question

To release the pressure and gunk under fault conditions (or bad manufacture).

Oh dear.

A: How old is it ? (from date of manufacture)

B: Can you read what brands they are ?

C: Has your PC sharted behaving strangely yet ?

D: What brand mobo is it ?

E: Replace ASAP with well-known brand, low ESR (switching) types.

You will find a lot of info here.

Graham

cross-posted to sci.electronics repair for info

That is REPLACE ALL OF THEM, NOT JUST ONES THAT HAVE BLOWN TODAY

Nice quip from the above

" From so many users, ranging from large corporate networks all the way to the home user, the number one reason people give for wanting to repair their hardware is they want to avoid a new system and the disaster known as Windows Vista!

On a humorous note regarding Vista, I spoke to an IT guy who manages a small business network for an insurance company (maintains a 100 terminal network), and had a bunch of failing Dell SX280's, which I repaired. One branch had the brilliant idea to "upgrade" to Vista systems, and his job was to make them all play nice with each other. This gentleman was probably the most professional, polite, and courteous clients I've ever spoken with on the phone, until we got onto the subject of Vista....then the four-letter words started flowing freely... In the end, he wiped all the Vista machines, and upgraded them back to XP Pro."

Graham

ROTFLOL.

I know exactly how he feels.

Although, I start off already a bit 'excitable' so I have a head start on the colorful language.

I think he's saying that you can't apply heat to the component side at all, even if it's directed only at the target device, because the package in question is a hybrid with SMT parts exposed on its own surface.

If its going in the bin once removed, that hardly matters.

"ian field" wrote in news:1HWWk.32297$ snipped-for-privacy@newsfe19.ams:

if you are removing it,it's likely because it's bad,and I would not try to salvage such a part for reuse on another board. I'm not even sure that BGA parts CAN be reused.(reliably)

I note manufacturers rework BGA boards by that "preheat and hot air" method.

have you seen

Best Regards

Steve sousa

I read they can be re-balled apparently ! Unlike eunuchs.

Graham

I heard a story (likely true) of an MD who went round the factory after 'time', pulling components back out of the bin and replacing them on the bench.

Graham

You refer to "the entire board". He refers to a PCB, but not the one you think. The part in question is a PCB in itself. It's a hybrid module with its own SMT parts, so you can't heat the whole part.

Google the part number and see what it looks like.

The stupidest suits tend to float to the top!

He also bought cheap thousands of TL072s that been salt-water contamined on a sea voyage IIRC.

You can imagine what that did to the returns rate !

Graham

YES, you can, damnit! The key is to PRE-heat the entire part so that the transition of temperature from that temp to the temp needed to remove the part is lower, and less likely to reflow only a portion of the pins. It insures that ALL the pins on the chip reflow, and the chip can be removed without damaging the PCB.

I never said anything about reflowing the entire PCB. HE DID!

I mentioned PRE-heating the PCB, and then HEATING only the part to be removed to the reflow temperature.

Aside from the fact it runs slower than XP on the same hardware and decides for you if you can copy AV files ?

Graham

Is that a portmanteau word? Perhaps a mixture of "shorted" and "farted"...

You're not supposed to put newer software on old equipment. Memory is cheap, just add some.

Considering I can duplicate copy protected DVDs with it, I don't think so.

Almost, but messier.

You obviously haven't smelled one after its vented.

Onomatopoeia, I suspect... the sound of an arc striking through foil-and-paper.

-- Dave Platt AE6EO Friends of Jade Warrior home page: