Re: SATA /PATA external supply ?
yes one direction....the other direction..not tested...
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Re: SATA /PATA external supply ?
They do test correct in only one direction yes?
If you get the same reading in both directions they are faulty.Leave a comment:
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Re: SATA /PATA external supply ?
most of the diodes are 0.2V on diode test..
one of them is 0.4V ...
How can I test opto coupler ?Leave a comment:
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Re: SATA /PATA external supply ?
The 0.22 ohm resistor should not be controlling the output voltages, with no load on the output they should be about 12v and 5v, if not then you have a fault with the feedback opto coupler circuit.
Take your suspect diodes out of circuit and check them for conduction in one direction only, use the diode check on your multimeter.
If your meter does not have a diode check then put the diode in series with a small bulb and battery, it should light only in one direction.Leave a comment:
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Re: SATA /PATA external supply ?
Yes!
Stop playing with things you're obviously unfamiliar with before you hurt yourself. Or, miswire something and backfeed line voltage (with, say, a fake supply) up a USB cable into a computer, via the drive you're trying to copy over, and destroy both!!
Don't jump in the "deep end" til you learn how to swim. I warned you about using the original fake POS supply w/o bonding; you then replied about connecting the EGC to the bottom of the non-isolated bulk filter cap, straight off the AC line rectifier- I also specifically told you about that.
You had no idea what was referred to when I mentioned secondary side bonding to the EGC; right away you knew where to put that green wire. If you actually connected the ground/EGC to the neg side of the big cap after the line rectifier, you'd have gotten a big surprise...
And now, because you can solder, right away you're trying to work from/modify some schematic. Have you even traced out the ckt on your board???
(not myself or my video, but still pertinent)
https://www.youtube.com/watch?v=zAWeiaGUqFALeave a comment:
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Re: SATA /PATA external supply ?
I put 0.15 ohm /5W on R1 and it gives me a short (bulb turns on very bright)
now I use 22 ohm /2W....it's working normally (no short ) but output only 1.1V and 2.1V
My rectifier diode forward voltage are only 0.1V.....I reckon, they're all broken...
Any suggestions ?Leave a comment:
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Re: SATA /PATA external supply ?
Thanks for the schematic,
it's working now...but I don't have 0.22 ohm /1W....
temporaly I change to 22 ohm / 2W.....It gives me a lower DC voltage output...
I'll change to to the proper one later on....waiting another month
Leave a comment:
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Re: SATA /PATA external supply ?
Here is another schematic, this basic 12v and 5v supply is copyed by many.
Attached FilesLeave a comment:
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Re: SATA /PATA external supply ?
do you guys have the schematic for this one ?
it's using FET 4N60Attached FilesLeave a comment:
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Re: SATA /PATA external supply ?
Can I connect negative side to ground straight away ? for safety,
without connecting to transformer ?
ThanksLeave a comment:
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Re: SATA /PATA external supply ?
just go to some used electrical markets / boot fairs and look for an old external scsi-case or external scsi / parallel-port cd drive.
they had very high quality 5v/12v psu's in the back of them.Leave a comment:
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Re: SATA /PATA external supply ?
There's a big difference between properly insulated two-wire SMPSes and the fake ones, that either have no EGC or have a "third wire" but don't connect it to secondary common. Leaving your computer/phone/whatever floating; should there be a fault from pri-sec, that "low voltage" device floats at line voltage...
As myself and others have repeatedly brought this up and clarified it ad nauseum, this will be the last time for me.
I'm done with this- anyone fooling themselves into thinking "it won't happen to me' really need to understand the principles at play; look into the fake iphone charger incident for starters, then put it all together and realize how that EGC protects you by providing "an effective fault-clearing path."Leave a comment:
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Re: SATA /PATA external supply ?
Check those 1N4007 there are 4 of those they usually go along with the fuse and mosfet but from your pic the resistor by the cap looks burned too.Leave a comment:
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Re: SATA /PATA external supply ?
What about those psus that only has a 2-prong plug, the low wattage units still can get UL listed without any problems, or are people proposing every SMPS require a 3-prong plug?Leave a comment:
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Re: SATA /PATA external supply ?
those do not connect to the EGC, but to the floating common of the input cap
What is EGC??Leave a comment:
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
Hi,
I have the above mentioned bord after repair, which was related to a lot of missing smd devices on the back of the board.
There were almost 20 devices missing, caps, resistors and some diodes/mosfets.
The board is generally working now, all PCIe ports are working, Windows installs normally.
However I have a problem with SATA ports 4-7 (the board has 8 SATA ports) - disks are not beeing recognized by the BIOS neither by Windows (which is usually normal in case BIOS does not recognize them).
The SATA 4-7 driver network is quite simple chipset<->buffers/drivers<->SATA... -
I have a 15 - inch Retina MacBook Pro from the mid - 2014 model. Here is the link: https://www.badcaps.net/forum/showth...light=820-3662 . The battery broke some time ago. After I removed the battery and plugged in the original power adapter, the MBP could boot up normally. However, when I checked with IntelPowerGadget, I found that the CPU speed was limited to 0.8 GHz, and it ran very slowly. Later, I found a solution on GitHub. There is an open - source project called cputune that can set the CPU running speed. So I can now run the MBP at full speed. But another problem...
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