Power supply problem on consolized?

Traxnada

Traxnada

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So there is my problem:
Im building an MV1A consolized and I have one little problem...
I just started building it this evening and when I did the first to boot the power supply, the fan did not work.
When I plugged it on the consolized the little LED turns on and everything seems to be fine.... but the fan of the power supply still does not turn on.
To turn the power supply on, I only connected a ground and the power switch cable (green) together...

The power supply used to work perfectly before...

Any of you has a solution for that?

Flavien
 
xiao_haozi

xiao_haozi

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Jan 22, 2009
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What type of PSU is this?

Did you have it connected to the board? The LED comes on in the PSU or the MVS board?

Maybe you have a dead fan... is this a new PSU or used one? Can you measure voltage off the PSU...?

Also, what do you mean by connected 'together'? You just put the PSU ground to the PSU power (sounds like that is what you were saying) or do you mean you actually ran these to the MVS?
 
L

li_gangyi

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Does everything else work like it should? Alot of newer PC PSUs might need warming up before the fans actually kick in, to try and lower noise.
 
Traxnada

Traxnada

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The LED on the MV1A turned on when I touched the PS green cable and the ground.
it's a basic 350W no-name (Elements... never heard about this brand) PSU that has been barely used... it's always been working fine. It was in a tower I bought a little while ago. I tested it for 10 hours max on a PC.
Ad no unfortunatly I do not have a Voltmeter at my disposition...
I dont really understand what happens.... I never started a PSU that way before so...
 
xiao_haozi

xiao_haozi

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Well does it have 3.3V rail?

And like li_gangyi said, a lot of the newer ones have a small little temp circuit to kick on when needed. This could be what is happening. But it could also be that you aren't hooking up the right rails to activate the fan in there.

Why not just grab a $10 5V PSU and run it from that? Don't have to worry about a big, hot, and overpowered PSU for just a 1 slot board...but that's just my 2 cents.
 
Traxnada

Traxnada

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Its not a new one... Its rather like 3 years old at least... It's just almost never been used...
Its also a pretty damn cheap one lol :)
Just 350 useless watts...
And yes , it has a 3.3V, I just have no use for it on an MV1A

Do you have any model of alims that could be good?
 
Traxnada

Traxnada

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I think we misunderstood each other here hehe (sorry Im french lol :D )
When I meant I had some 3.3V coming out of the PSU, I meant
atx_engadget_howto.jpg

I didnt get the "rail" thing right away... I just have the basic 3.3V coming from any ATX... not the one for more powerful graphic cards :)
 
xiao_haozi

xiao_haozi

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Well, ATX has that which is a constant... this is what I mean you will have to deal with. From my limited understanding, the AT PSUs have a throw switch for the power... the ATX has the constant so you get power out of it as soon as it's plugged into the wall. This is what I mean you would have to 'handle' that constant rail. For some reason I thought that was a 3.3V rail...but looking at that diagram I guess it is a separate 5V rail that is constant.

Do you have an older AT laying around you could use? Else, I would recommend going with a smaller power adapter and searching back on powering with only +5V, or ask/search back for using an ATX and handling the constant rail.
 
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buaku

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Did you have the machine hooked up to the TV when you turned the power supply on? Did anything show up?

Perhaps the fan on the power supply died. I've had that happen before. You can try to spin the fan around yourself. Use a pencil or something like that to try and move it around. Preferably with the power off at first. The rest of the power supply could be fine. With no fan I guess you run the risk of the power supply overheating.

From what I've read you don't normally want to use the +5v constant for this application.
The better way, when you're done, is to wire a switch between one of the grounds and that green PS_ON connection. This way you have a nice on/off switch :)
 
Xian Xi

Xian Xi

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You dont really need the fan for the low draw of a 1 slot.
 
Traxnada

Traxnada

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No the board was not hooked up to the TV... I pretty much only did the powering for now.
And of course yes, a switch is planned ;)
It was just my first test hehe
And I guess Ill just let it run like that then Xian-Xi... For a little while just to see if it warms up.
But Ill try with a new one for now.
As I said, it's my very first consolized so I chose to use the jamma only and to use a basic PSU for now...
My next one will be nicer and cleaner for sure :)
Today Ill start building the video converters (VGA, Composite AND S-Video) :)
 
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