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Author Topic: Fitting an iTuner PW-200-M ATX PSU inside A1200  (Read 12471 times)

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Offline PainkillerTopic starter

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Fitting an iTuner PW-200-M ATX PSU inside A1200
« on: July 30, 2007, 03:27:51 PM »
This tutorial is still a work in process and will be updated from time to time whenever I have the time to work on my new investment ;)

So everything you do you do at your own risk!

If I have posted misinformation then please correct me and I will edit the tutorial.

So here is a little background. I started this project because I wanted my A1200 to remain in its original case with minimum modificatioins and the PSU needed to have the juice to power up BlizzardPPC 200Mhz 060@50Mhz and bVision. I also didn't want to use a big normal sized ATX PSU outside the case, because the additional power connectors would be just too ugly on my desktop ;)

What you need:
There is a little PSU called iTuner PW-200-M  can be found from http://www.mini-box.com/PW-200M-DC-DC-power-supply?sc=8&category=13

You will also need a good 12VDC power adapter for that, also found from http://www.mini-box.com/110w-12v-8-5A-AC-DC-Power-Adapter?sc=8&category=13

That 12VDC power adapter has a total ouput of 110W which should be enough for the configuration I mentioned above. PW-200-M can manage a 6A constant load on 5VDC line and peak at 10A which should also be enough.

Here is what you need to do to fit the PSU under the floppydrive. Desolder the ATX connector from the PW-200-M PSU. I would also reconmed to desolder the original Amiga PSU connector, so that you can run thick enough wires directly to the PCB.

Here is a picture of the connection on the Amiga PSU connector end after desoldering and running the wires directly to PCB. I used 1mm² wire for the O VDC(COM) line, and 0.75mm² wire for 5 VDC line. The thicknes for the 12VDC line and -12VDC line aren't so important so I used a 0.5mm² wire for those.



Sorry I'm unable to upload the picture for the ATX PSU end now. Anyways here is a pinout for ATX 20pin connector. I'll upload the pic ASAP

EDIT: How stupid of me I forgot that one can upload pics to here :) So here it is and more pictures coming



http://www.hardwarebook.info/ATX_Power_Supply
« Last Edit: May 25, 2009, 07:05:31 AM by Painkiller »
 

Offline PainkillerTopic starter

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Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #1 on: December 24, 2007, 08:36:48 PM »
Here are rest of the pics from the installation:



I had to cut a little plastic to make it go lower so that the floppy drive would fit over it. But nothing that would show outside the case.



Added some cartong to insulate the floppy from the PSU as it made a little contact to capasitor shielding on the PSU.



Here it is in place. I used hotglue to secure it.



And here is how it looks like from the backpanel.

With this modification I was able power up my BPPC and BVision + I got the power switch right in the back of my A1200 :D
« Last Edit: May 25, 2009, 07:08:00 AM by Painkiller »
 

Offline Flashlab

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Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #2 on: December 24, 2007, 08:42:33 PM »
Good stuff! I always wanted to do something like that when I still had my 1200.
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Offline adonay

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Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #3 on: December 24, 2007, 09:57:31 PM »
Thank you i will do this for my own project ... How hot does it get i mean it is quite close to bvision ?
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Offline krize

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Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #4 on: December 25, 2007, 05:36:37 AM »
Nice mod!
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Offline PainkillerTopic starter

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Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #5 on: December 25, 2007, 12:53:08 PM »
@adonay

The ATX PSU barely heats up (if at all). Most of the heat will be generated by the 12VDC PSU outside the case.
 

Offline adonay

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Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #6 on: December 25, 2007, 01:14:13 PM »
Quote

Painkiller wrote:
@adonay

The ATX PSU barely heats up (if at all). Most of the heat will be generated by the 12VDC PSU outside the case.


Ok i cant wait to try this out looks like a great mod..
A1200 ACA 1230
 

Offline PainkillerTopic starter

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Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #7 on: December 25, 2007, 01:23:04 PM »
I'd say that trickiest part would be cooling down the BPPC card, but I have seen some great solutions in the photo gallery. I personally had a flat fan in the bottom, but for that I had to lift up my amiga and I didn't like that. Now that I'm selling my BPPC and BVision away I'm just happy to have 12VDC solution in my amiga + no fans (I just hate'em, even my PC doesn't have any fans).
 

Offline AJCopland

Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #8 on: January 24, 2008, 11:24:20 AM »
That is awesome! I've been wanting, but not knowing how, to do something similar for my A1200. I was just planning on having an external ATX PSU but your solution is much cleaner.

Well done.

Andy
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Offline keropi

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Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #9 on: January 24, 2008, 11:31:44 AM »
very nice mod!!!!
 

Offline delshay

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Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #10 on: January 24, 2008, 11:42:14 AM »
well done.

but this project does have drawbacks.

1. if the powersupply goes faulty its a lot of work to change it.

2. it blocks access for a BlizzPPC SCSI or any other device that use that slot.

3. it has lots of cable going across the motherboard.

excellent project.

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Offline arnljot

Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #11 on: January 24, 2008, 12:43:37 PM »
How was the powerswitch fitted? It doesn't seem like it's a part of the PSU that you bought?
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Offline hardlink

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Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #12 on: January 24, 2008, 04:11:19 PM »
Quote

Painkiller wrote:
 Now that I'm selling my BPPC and BVision...


After all this, you are parting with the magic parts???
With this wonderful mod, I'd think it would be time to BUY a BPPC and BVision for it and go OS 4  :-?
 

Offline Jope

Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #13 on: March 16, 2008, 01:02:45 PM »
Quote

arnljot wrote:
How was the powerswitch fitted? It doesn't seem like it's a part of the PSU that you bought?

Normal ATX power switch I guess. Short the green wire to ground, IE. pin 14.

http://www.hardwarebook.info/ATX_Power_Supply
 

Offline PainkillerTopic starter

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Re: Fitting an iTuner PW-200-M ATX PSU inside A1200
« Reply #14 on: May 27, 2008, 12:10:29 PM »
Quote
How was the powerswitch fitted? It doesn't seem like it's a part of the PSU that you bought?


I bought the power switch from local electric shop. Just make sure that it isn't an push button that releases contact after pressing othervise it wont power up. To have the PSU powered up you need a constant connection between the wake up and ground after you break the connection ATX psu will power down.