^what looks like the primary switcher has 6 legs. is that the SMP ic?
Yep. Common in certain DVD/BD players too.
It's sort of like a giant TOPswitch. Can't give a more specific example w/o the P/N of that IC...
There should be a large resistor from B+ to one of those small caps on the pri side. That same cap will have a diode, possibly thru a low-value resistor, from a transformer pin- the aux voltage for the PWM IC.
This one charges that cap via internal bypass until supply "kickstarts." Yours might do the same if you can't find that resistor.
Also notice that D5 is a 1N4007. They don't want the snubber diode to be too fast, since it could lead to excess RFI.
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"pokemon go... to hell!"
EOL it...
Originally posted by shango066
All style and no substance.
Originally posted by smashstuff30
guilty,guilty,guilty,guilty! guilty of being cheap-made!
a diode that has "er106" written on it. in between the the opto-isolators and that larger of the two caps on the primary.
actually, it still pulses on startup.
Just a heads up, there have been HDDs spotted in the wild that require 3.3V.
So the ideal HDD adapter would have 12v, 5v, and 3.3v, and two connectors, one SATA power, one molex.
Just a heads up...
Newer PSUs will (or should?) come with a four wire SATA power connector instead of the usual 5.
Pin 3, which was formerly used for 3.3V is now being used to signal power disable, which allows a hard-reset of the HDD through software (convenient for data centres which need to remote control HDDs apparently).
"We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."
^ Interesting. I wonder if that signal is just a matter of simply pulling the pin High/Low.
Probably pull low (with the HDDs having an internal pull-up resistor to 3.3V) to disable the HDD so that such HDD would still work when connected to a PSU that has the 3.3V wire. But that's just my guess, of course.
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