Re: iMac P/S posts then shuts down

hi, i do get the 20vdc & 5vdc standby voltage, but the rest of the ps doesn't fire up when shorting pin 15 to 16. so i'll check the 'not quite their' thead u refered to toasty,

tnx, mark

Re: iMac P/S posts then shuts down

thankyou toasty, that's exactlly what is was looking for.

6 caps were bad- c 40, c49, c47, c52, c1, c53 - i actually tested them
with my ESR meter. I replaced all of the other electrolytic caps too. the brands i used - decent brands from my local electronics supplier that i have used for years, i didn't pay attention to the manufacturers, they're already installed. i've used the his stock in the past with no problems, but i do recall 'rubycon' & 'elna'.

series - again i didn't look.

i installed...

Re: iMac P/S posts then shuts down

hi, i'm fixing my brother imac g5 with psu pn: 661-3350

does anyone have the pinout for the 22pin connector on the output of
the powersupply? i want to make sure the psupply is good first.

i have repaced c40, c63, c49, c47, c52, c45, c1 in the supply so far.

tnx, mark