Re: PowerMac Dual 1Ghz Mirror Drive Pop&Burn Power Supply
@ Toasty,
Thanks for the info. This is pointing me towards what I "think" is needed.
I really appreciate the help.
So going off what you have discovered and that the values increase based on temperature, I searched high and low for a thermal switch
Below is my results and looks to be the closest match I could find.
There are 4 available temp cutoff points, according to the Data-sheet.
Here is a pdf link for the product, under...
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Re: PowerMac Dual 1Ghz Mirror Drive Pop&Burn Power Supply
@ Toasty,
Thanks anyways.
So I took the part of the heat-sink and there is no markings or part # on the bracket or Thermistor.
Taking closer inspection, it appears that the Thermistor was glued into the metal arm for bolting to the heat sink due to very limited air flow or to prevent damage or short against the heat-sink upon installation.
I have been able to determine that the Thermistor is aprox 3mm and lead spacing of approx 2.50mm - 3mm
Plugging...
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Re: PowerMac Dual 1Ghz Mirror Drive Pop&Burn Power Supply
@ Toasty,
Thanks for the tip... I did not think to go above 10A ratings in my search, but it worked like a champ!
I got the parts in and have repaired one unit and its now happly powering a MDD Dual 1.42 system.
The parts replaced:
Mains Cap
Most of the vent caps
both switchers (Q1,Q2).
Thermistor (TH2)
Both units had the same failed components, so it would appear to be common on the samsung units.
Now for a...
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Re: PowerMac Dual 1Ghz Mirror Drive Pop&Burn Power Supply
@ Toasty
Sorry to dredge up an older thread. But just had a quick question
I have 2 of the samsung power supplies identified here. I have also identified all the failed components through bench disassemble, however...
The Thermistor on both my units had failed and the part # is not legible for the original and obviously were not testable for resistance etc.
You had identified a replacement below
[url]http://search.digikey.com/scripts/D...ame=570-1046-ND[/url]...Last edited by billabongo; 05-27-2010, 03:11 PM.
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