How do I open a Dell AC Adapter?

On Wed, 03 Jan 2007 15:05:49 +0000, Homer J Simpson Has Frothed:

Well the OP said the LED was not lit and the supply was hissing. I wouldn't expect that from a supply where just the cord was broken.

It hissed before a couple of times, and if I moved the cable - it would work properly.. But at one point it never stopped hissing whatever I did.

messagenews: snipped-for-privacy@nntp.sun-meatplow.local...

even shoot flames out.

It does get extremely hot (the cord). Also a certain part of the adapter gets hot when it hisses. Doesn't matter! It's done. It's dead, i need another AC Adapter.

The hissing is arcing and burning of the insulation which is probably carbonized.

On Thu, 04 Jan 2007 03:24:36 +0000, Homer J Simpson Has Frothed:

The hiss would indicate to me that the dc component has a high frequency pulse. Plus the OP didn't mention any burning smell did he?

A few hundred here, a few hundred there: it all adds up!

(This idea is borrowed from the tale of some report that totalled the dB heard by someone at one moment: Normal Conversation 60 dB + Vacuum Cleaner 80 dB = 140 dB !!! Or was it totalled over the day...)

this fault sounds like bad electrolytic caps, especially if there is hissing and heat. this may have been brought on by a short in the cable. either way, given that you may well break the thing by getting it open I'd start looking for another.

-B.

No, I think you diag'ed correctly in the first place. Likely it's been damaged beyond easy repair, though. Get another one ASAP.

jak

snipped-for-privacy@gmail.com ha escrito:

nah, nothing to do with 'surge protection system' (whatever that is). Those units are typically sealed with no ventilation at all, and with the current trend to making everything as small (and disposable) as possible, the components run hot and this shortens the lifespan of the device. capacitors especially suffer from this. That said, the cable damage may have precipitated this and shorted out something on the secondary of the power supply. In any case, it's junk. Get another.

-B.

dB doesn't work that way. If both noise sources were +80 dB, the total would only be +83 dB.

I th>It hisses with interruptions, like a beep.. and when I press against