Re: Hard Drive Power Supplies
^what looks like the primary switcher has 6 legs. is that the SMP ic?
^what looks like the primary switcher has 6 legs. is that the SMP ic?
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Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....
"Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me
Excuse me while i do something dangerous
You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.
Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore
Follow the white rabbit. -
Re: Hard Drive Power Supplies
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.Attached Files"pokemon go... to hell!"
EOL it...
Originally posted by shango066Originally posted by smashstuff30guilty,guilty,guilty,guilty!
guilty of being cheap-made!
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Re: Hard Drive Power Supplies
^fixed the startup, but now the tranny makes a chattering sound.Last edited by goontron; 07-24-2015, 07:03 PM.Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....
"Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me
Excuse me while i do something dangerous
You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.
Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore
Follow the white rabbit.Comment
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Re: Hard Drive Power Supplies
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.Last edited by goontron; 07-24-2015, 07:52 PM.Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....
"Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me
Excuse me while i do something dangerous
You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.
Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore
Follow the white rabbit.Comment
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Re: Hard Drive Power Supplies
Did the old diode test bad?Comment
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Re: Hard Drive Power Supplies
^ no.Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....
"Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me
Excuse me while i do something dangerous
You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.
Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore
Follow the white rabbit.Comment
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Re: Hard Drive Power Supplies
What is that PWM IC?
I'm assuming (again, lol) that it still pulses with heavy loads on the outputs."pokemon go... to hell!"
EOL it...
Originally posted by shango066Originally posted by smashstuff30guilty,guilty,guilty,guilty!
guilty of being cheap-made!Comment
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Re: Hard Drive Power Supplies
^ pulses on startup with load.
makes a Thunking/chattering/fast tick noise out of the trafo with no load when running.
TOP247YNLast edited by goontron; 07-24-2015, 09:54 PM.Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....
"Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me
Excuse me while i do something dangerous
You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.
Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore
Follow the white rabbit.Comment
-
Re: Hard Drive Power Supplies
DOH! i changed the 220uF cap next to the opto-couplers with a 330uF. no wonder its oscillating.Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....
"Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me
Excuse me while i do something dangerous
You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.
Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore
Follow the white rabbit.Comment
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Re: Hard Drive Power Supplies
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).Comment
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Re: Hard Drive Power Supplies
^ 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.Last edited by momaka; 05-27-2018, 07:27 PM.Comment
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I'm in need of assistance with a Dell Precision 5820 Tower. The BIOS is locked with "Dell Security Manager," preventing access to the HDD-1 hard drive.
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