Question about testing mesurements

[8ternity]

Hi everyone,

I had an iMac A1200 that is dead after Hydro companie come to change the counters when im not there and my imac is now dead.

I had an ATLAS ESR70+ and also an TEC Capcitance meter. After unsolder, i've test an capacitor and the mesurement exceed 10% of higher.

It's an 1500uF 6.3V, with both tester, i had an reading of 1750~1790uF. Way more than 10%. I would like to know if their still good, or isn't normal to read over the 10%.

How can we know when it's good or not when exceed the uF value.

Thanks.
8ternity

[stj]

Re: Question about testing mesurements

higher uf is o.k.

check the esr with the atlus.

[selldoor]

Re: Question about testing mesurements

I dont know for sure but would say it is unlikely to be a problem - what is the make and series.

[8ternity]

Re: Question about testing mesurements

higher uf is o.k.

check the esr with the atlus.

ESR 0.02 1500UF 6.3V

For the Brand Name and model, will follow you tonight for that. Im at Work right now.

[stj]

Re: Question about testing mesurements

0.02 sounds o.k.

[selldoor]

Re: Question about testing mesurements

Hydro companie come to change the counters when im not there and my imac is now dead.

What does that mean - why would it affect your imac



Does it mean the electric company changed the meters causing a power surge and your Imac didnt like it?

[JASTECH]

Re: Question about testing mesurements

Selldoor, I think that would be a given, eh?

8ternity, make sure you have latest firmware in Atlas.

[brethin]

Re: Question about testing mesurements

Selldoor, I think that would be a given, eh?

8ternity, make sure you have latest firmware in Atlas.

Not a given, For his failure anyway. Removing power should cause a issue unless there is already a problem to begin with.

What caps are you testing? A lot of missing information to help you get it fixed. The readings you have provided so far for the caps you have tested are fine so that's not the problem if you tested them correctly and out of circuit.

[budm]

Re: Question about testing mesurements

FYI: Typical electrolytics caps have +/-20% tolerance.

[Agent24]

Re: Question about testing mesurements

If your PC is normally on all the time, and when it lost power it won't even turn back on, it could be a failure in the startup circuitry of your power supply (often just a high-value resistor(s) to supply some power to the PWM controller IC)

Since this is not used when actually running, if the startup circuit fails during normal operation, the power supply will still run, but as soon as it loses power it will not come back on again when the power comes back.

[JASTECH]

Re: Question about testing mesurements

Brethen, depends on system. I had PC's that would boot from power O/l. If the supply isn't psw then damage has already trotted about the PC. I would guess sense he doesn't use battery backup w/avr that his PC isn't plugged into a home run. So this wears down the parts too, it all weakens the PC to where a power pop could damage it. jmho

[stj]

Re: Question about testing mesurements

make sure you have latest firmware in Atlas.

i know someone with an Atlas,
how do you know what the latest version is, and how do you upgrade it?

[selldoor]

Re: Question about testing mesurements

Selldoor, I think that would be a given, eh?

.

It might be a given for you but in the UK a Hydro company would be something to do with WATER not electricity so to me he has said.
The guy from the water company came to change the water meter ....


8ternity Why not open a new thread in troubleshooting PCs with pictures of the boards

[JASTECH]

Re: Question about testing mesurements

stj, here is a link.
http://www.peakelec.co.uk/acatalog/esr_support.html

selldoor, I sit corrected, read correctly but my brain over ran the "hydro" thinking he meant an kw meter. OK, now if metalic ground is used for his place then harmonics and UN grounding via hydro meter is still plausible.

[Agent24]

Re: Question about testing mesurements

Could be electricity that comes from Hydroelectric power.

[selldoor]

Re: Question about testing mesurements

Could be electricity that comes from Hydroelectric power.

Id guess you are correct