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New Power Supply Is Not Giving Full 12v Or 3.3v


i didn't understand why we can not use atx directly in our circuit when our cpu's mother board and all things work with it.....what is diffrence b/w atx and regulated power If the PSU On signal is now correct at the logic level 0 state, the PC's power on pushbutton and/or its wires are bad. The PSU senses the PSU On signal is now less than or equal to +0.8v which is a logic level 0 and starts enabling its primary or main power converter circuitry. At this point replacing the PSU, The motherboard or both will resolve your issue.

With these costing you only $25 and having short circuit protection, thermal protection, Overload protection and varied output voltages of 3v, 5v and 12v but we will me modifying it to it is entirely irrelevant for RepRap use. Now plug the PSU back in, make sure its power switch is set to on or the 1 position and recheck the 5v Standby voltage. It is also limited to the input PSU's current limit.

3d Printer Atx Power Supply

Similar Threads - power supply giving Blown power supply in grandpas computer please help!!! solved How big is my 12v rail. Half of the Red wire's pin has come out of it's molex connecter..

Style Default Style Contact Us Help Home Top RSS Terms and Rules Copyright © TechGuy, Inc. It is important to note that the + and - 12V supplies are normally not considered by the PSU before it asserts a Power Good\OK signal! Privacy policy About RepRapWiki Disclaimers Articles & News Forum Graphics & Displays CPU Components Motherboards Games Storage Overclocking Tutorials All categories Chart For IT Pros Get IT Center Brands Tutorials Modify Atx Power Supply For 3d Printer If the PSU On signal is now a logic 1 (~ 2.5v or higher) your motherboard is bad.

Understand that just because you have a Power Good\OK signal, does not guarantee +- 12V is ok, although with a well designed PSU, there is a high probability that most of Reprap Atx Power Supply Once you have this resolved, skip the following and go on to the next section. Then suddenly my screen filled with green squares and I restart my pc.. http://www.tomshardware.com/forum/340760-28-voltage-help I simply connected green (power on) to GND (black) to make the original switch work.

It gets this signal from the motherboard via the green wire connected to pin 14. Atx Power Supply Minimum Load All rights reserved. The purple is a constant +5v supply no matter if the PSU is on or off. These voltages are often called rails, referring to the fact that although there are multiple wires carrying a specific voltage, they are normally tied to a single rail (or tap) in

Reprap Atx Power Supply

Is there any way to make the 18 volt power supply fit the requirements of the 5 volt device.


The power supply is actually a "voltage supply". her latest blog Gr3iz replied Feb 21, 2017 at 10:58 AM Loading... 3d Printer Atx Power Supply Duct tape to avoid any potential hooking of wires, and to secure the switch. Atx Power Supply Wire Colors Don't open the housing unless absolutely neccessary.

Btw, I use LM338K. Install the ... 7 Step 7: Make it PrettyYou need some way of clearly marking which post is which voltage. I'm new to all this. So i tried with coolermaster one again and same thing happened.. Atx Power Supply Load Resistor

They also may be affected by the motherboard and the +5v can be affected by the hard drive. It is possible for both the PSU and Motherboard to be bad! thanks!

i would suggest you use maybe 3 wires, at most, of each color. http://magicnewspaper.com/power-supply/power-supply-makes-clicking-noise-when-i-press-power-button.html Than as i connected it the system booted just fine (it was restarting in the posting process all the time with the 5870 - thats why i thought it was VGA

If this fails to give you a good reading on the +-5, 3.3v, or -12v either the PSU is bad or the motherboard is killing the voltages. Prusa I3 Power Supply need help.. ATX PSUs which are specified as "Haswell ready" should never have this problem.

solved Corsair Vengeance 650M or Be quiet Pure Power 9 solved Power Supply not giving enough power?

If the jumpers are correct and the power connector is plugged in securely, Try the hard drive on another aux power cable. If it does not change value there is either a problem with the PC's power on pushbutton and/or its wires or the motherboard is bad. All fans (except CPU and PSU), optical drives, floppy drives, USB devices are disconnected and all adapter cards including any graphics adapter are removed. Atx Bench Power Supply Load Resistor lakshitharxxJul 11, 2012, 11:50 PM I connected everything back and now both bios and AI suit shows 12.096V and it is stable..

Connecting a 4.7ohms 10W resistor, an old CD drive or a 12V light bulb (into the 5V rail, see picture) are well proven methods to generate this "dummy" load. RicoBOTSep 24, 2013, 12:12 PM Hi again guys. JohnWill, Mar 12, 2006 #3 crjdriver Moderator Joined: Jan 2, 2001 Messages: 35,071 Your voltages are OK, however allied is a pretty low quality mfg. http://magicnewspaper.com/power-supply/graphic-card-power-to-power-supply-or-connector-on-motherboard.html Floppy or CD drives will not help for this as they do not continuously power their drive motors.

Thank you

I've tried to make this but I've found a couple of problems:

What should I do with the gray wire? So-far, the Pwr-On wire is blue, and I haven't fried anything yet. (still remembering my 1st Dell supply going up in smoke..)

One thing you might do when re-using an old computer Just copy (mark then ctrl-c) and past into your website. You should never tie power sources together that have different ampacities.

Didn't even touched the breadboard for nearly 10 mins.

I checked later on, the fuse soldered on the main board (5A L240V) has blown.

Can you please give me any idea what For about $10! If for some reason they are not correct, go back to the appropriate section and resolve the issue.