Current only flows at a constant voltage when the dielectric breaks down - ruining your cap. This is why caps are rated at a maximum voltage.
Current can flow if the voltage is time-varying (Ic(t) = C * dVc/dt). A capacitor looks like a resistor at high frequencies, with resistance proportional to frequency.
Nothing, nada, no news, no ship date == me thinking about "switching" back. I need to get work done, and being held to proprietary motherboards sucks my ass :shakehead
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KwitkoSheriff of Banning (Retired)By the thing near the stuffIcrontian
edited May 2005
Apple ain't all it's cracked up to be, eh?
I think there's an important lesson to be learned here- Apple sucks ass.
uh oh the resident mac convert didnt like the switch, uh ohs. But he must get in his jab about OSX being "so much better than WinXP" I like being able to run my operating system on my computer though without having to rely on a single company to get me back up and running.....
yea apple isnt the only company with cheap capacitors.....believe it or not, my xbox started to get really really messed up, it would randomly shut off, the games would freeze ect. I do alot of modding so it was my instinct to open it up and i saw a leaking capacitor Yea but lucky for me, I purchased a failed mod attempt mobo on ebay for $10 and I was just gonna use it for spare parts and it actually came in handy And the best part was, the mobo i bought, and the one in my xbox were the same version, so i just snipped off the capacitor on the xbox, and soldered it back onto my board
I removed one of these dodgy looking caps today and measured it with a capacitance meter, would you believe it showed a normal 1800uF but when I connected it across a 5V PSU, it drew 2.5 amps constantly . These caps are virtually impossible to desolder because the tracks to which they are attached act like big heatsinks so the soldering iron loses it's heat very quickly. The strange thing is that the DC rails read normal voltages on the multimeter and with very little ac noise present. I'm at a loss with this board.:banghead:
Had the same thing happen on my old KT7A-Raid, I called the company that made the caps and they sent me a handfull of replacements that didnt look like the originals. Thay were made by "Jackcon". They were 1500uF 6.3 volts.
The motherboard had been replaced, of course. I opened it today to pull the RAM out, and guess what:
MORE LEAKING CAPS.
Wtfail. Right in the trash. A final testament to Apple's bad choices in hardware and philosophy. If this were a PC, I could replace the motherboard and still have a working 1.8ghz, relatively modern extra PC for the house. As it stands, I'm pulling the RAM and HD out and putting them in a PC for my son.
I spent $1400 on that thing in 2005. I regret the choice. No upgrade path, Apple fucked me over by dropping all support for PowerPC, and there is nothing I can do with this hardware. Scrapyard.
Hey primesuspect, you wouldn't happen to still have the hard drive sensor and bracket at your place somewhere? The sensor would've been taped to the drive.
Comments
You mean the Europeans swallow?
Prime, any update on when Apple will have your replacement parts?
And until it's fixed, you might want to change your label under your name to "Killed my iMac, did I?"
Screw Gatorade, just take a lick off the caps, prime
Current can flow if the voltage is time-varying (Ic(t) = C * dVc/dt). A capacitor looks like a resistor at high frequencies, with resistance proportional to frequency.
No update
Nothing, nada, no news, no ship date == me thinking about "switching" back. I need to get work done, and being held to proprietary motherboards sucks my ass :shakehead
I think there's an important lesson to be learned here- Apple sucks ass.
sorry prime, I wuv you
Just use style XP and a dock program with a OS Tiger scheme or something. I can give you all three if you want.
the moral of the story is, YOU could be next..
The motherboard had been replaced, of course. I opened it today to pull the RAM out, and guess what:
MORE LEAKING CAPS.
Wtfail. Right in the trash. A final testament to Apple's bad choices in hardware and philosophy. If this were a PC, I could replace the motherboard and still have a working 1.8ghz, relatively modern extra PC for the house. As it stands, I'm pulling the RAM and HD out and putting them in a PC for my son.
I spent $1400 on that thing in 2005. I regret the choice. No upgrade path, Apple fucked me over by dropping all support for PowerPC, and there is nothing I can do with this hardware. Scrapyard.
dras: no problem, it's all yours