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Author Topic: Power Supply Fan Dying on A4000  (Read 1417 times)

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Offline pan1kTopic starter

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Power Supply Fan Dying on A4000
« on: September 08, 2008, 12:53:18 AM »
Ok guys.. it's time to replace the power supply on my A4000D. How hard is it to hook up an ATX supply with one of these cables from Australia? I'd like to wire it in to the stock on/off switch.

I've got tons of ATX supplies..! i just need a cable.
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Offline pontium

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Re: Power Supply Fan Dying on A4000
« Reply #1 on: September 08, 2008, 01:48:52 AM »
To power up a single atx psu,just wire a cable on pin 14 and any ground from the 20 pin connector.

Well,you can place a switch on this wire and work it like an AT psu.So put the switch of the original psu in the front of the case,and place it on the metalic plate.

About the mobo voltage pinout,it's very easy to wire it with your new psu.Use a voltage meter to connect them right

Good luck!
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Offline T3000

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Re: Power Supply Fan Dying on A4000
« Reply #2 on: September 08, 2008, 06:30:35 AM »
 :idea: If it's just the fan that's going bad, swap it out with one from another power supply.
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Offline LoadWB

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Re: Power Supply Fan Dying on A4000
« Reply #3 on: September 08, 2008, 07:20:15 AM »
The fan is a standard size case fan, 80mm IIRC.  When I replaced mine, I cut the fan guard out of the original PSU box and replaced it with a wire fan guard to allow more air-flow in.  I also bypassed the resistor which is in series to the fan's power lead to allow the fan to run full speed.

Although, I eventually replaced original PSU with a mini-ATX power supply with an ATX adapter from AmigaKit.  I use the key lock as my ATX power switch :-)
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Offline rkauer

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Re: Power Supply Fan Dying on A4000
« Reply #4 on: September 08, 2008, 11:00:48 AM »
 Finally someone find something useful to do with that useless keylock!

 Congrats, LoadWB! :-)
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Offline Crumb

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Re: Power Supply Fan Dying on A4000
« Reply #5 on: September 08, 2008, 11:58:11 AM »
@LoadWB

Which brand of PSU did you use? Does it fit the standard A4000D ok?
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Offline LoadWB

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Re: Power Supply Fan Dying on A4000
« Reply #6 on: September 09, 2008, 01:59:50 PM »
Quote
Crumb wrote:
@LoadWB

Which brand of PSU did you use? Does it fit the standard A4000D ok?


Off the top of my head, I'm not sure.  It is a half-sized PSU my vendor had in stock.  It fits ok, but leaves a big gap which I covered with cardboard (might use some metal one day.)

I have a photo posted showing an 80GB SATA drive attached to my 4000D.  You can see the PSU in that picture.  If I get the inkling, I'll pull the case off the 4000D and take another photo of the PSU and post it.
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Offline keropi

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Re: Power Supply Fan Dying on A4000
« Reply #7 on: September 09, 2008, 02:03:42 PM »
I have tried several mATX psu's on my G-REX A4000D , but none gave sufficient +5v , causing lock ups in AGA stuff... a model number would be great LoadWB!
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Offline alexh

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Re: Power Supply Fan Dying on A4000
« Reply #8 on: September 09, 2008, 02:12:40 PM »
I favour just replacing the fan. I've done it on several A4k PSU's.

I think remember LoadWB's A4000 fan case mod (did you post pictures here?) I remember thinking it was a good idea if you can cut the metal safely.
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Offline LoadWB

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Re: Power Supply Fan Dying on A4000
« Reply #9 on: September 10, 2008, 07:30:27 AM »
Quote
alexh wrote:

I think remember LoadWB's A4000 fan case mod (did you post pictures here?) I remember thinking it was a good idea if you can cut the metal safely.


Sure did.  I dug up the gallery pic:

A4000 w/IDE-SATA Adapter

Shows the PSU pretty well.  Later this week when I have a moment to take a breath (should that actually happen,) I'll pull the top off the 4000 and get the PSU information.  Provided that it's not on the part which is double-sided to the case :-)
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Offline amigadave

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Re: Power Supply Fan Dying on A4000
« Reply #10 on: September 10, 2008, 11:18:13 AM »
Quote

pan1k wrote:
Ok guys.. it's time to replace the power supply on my A4000D. How hard is it to hook up an ATX supply with one of these cables from Australia? I'd like to wire it in to the stock on/off switch.

I've got tons of ATX supplies..! i just need a cable.


Hey Chris, I think I have an extra A4000D PSU from the A4000 I sold to someone in Germany last year.  He didn't need a 110volt PSU and it saved a bunch of weight to remove it.  Let me know if you want it.
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Offline Nlandas

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Re: Power Supply Fan Dying on A4000
« Reply #11 on: September 10, 2008, 01:50:59 PM »
Quote

pan1k wrote:
Ok guys.. it's time to replace the power supply on my A4000D. How hard is it to hook up an ATX supply with one of these cables from Australia? I'd like to wire it in to the stock on/off switch.

I've got tons of ATX supplies..! i just need a cable.


If just the fan is dying why not replace it. Simple wires to solder onto a new same size fan.

-Nyle
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Offline alexh

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Re: Power Supply Fan Dying on A4000
« Reply #12 on: September 10, 2008, 02:28:45 PM »
Quote

LoadWB wrote:
Sure did.  I dug up the gallery pic:

A4000 w/IDE-SATA Adapter

I do not think this was the project I was thinking about. (Might be wrong, but I'd not seen these pics)

It might be Motorolin's hack (but I'm not sure looking at the pics) where he cut out the section on the rear of his A4000 where the PSU fan went and added a grill.

I remember thinking how crap the A4000 grill work was in the back of the case behind the PSU.

http://www.amiga.org/gallery/index.php?n=2005
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Offline LoadWB

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Re: Power Supply Fan Dying on A4000
« Reply #13 on: September 14, 2008, 03:35:30 AM »
Quote
alexh wrote:

I do not think this was the project I was thinking about. (Might be wrong, but I'd not seen these pics)

It might be Motorolin's hack (but I'm not sure looking at the pics) where he cut out the section on the rear of his A4000 where the PSU fan went and added a grill.

I remember thinking how crap the A4000 grill work was in the back of the case behind the PSU.

http://www.amiga.org/gallery/index.php?n=2005


Quite possibly.  I hacked my A4000 PSU with a grill on the fan, and tossed the idea of a grill on the back around, but I didn't have anything that could have cut the metal without really making a mess (that's a nice job.)

I did, however, go ahead and take pics of the ATX PSU I used in my system.

A4000 MicroATX PSU Replacement (1/2)

A4000 MicroATX PSU Replacement (2/2)
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Offline wlemonds

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Re: Power Supply Fan Dying on A4000
« Reply #14 on: September 14, 2008, 05:21:50 AM »
Just an FYI the website is here. And it's cheaper at Newegg. I've never had problems with them.

I haven't bought this PS though.
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