17 June 2014, 06:02 | #1 |
Ol'Cogger From yesteryear
Join Date: Sep 2013
Location: Mount Cotton, QLD, Australia
Posts: 41
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A590 - POWER SUPPLY - Circuit
Can anyone link me to the A590 power supply schematics or circuit diagrams.
I've found the user manual etc for the A590 but so far I've had no luck find the power supply info thanks Pete |
17 June 2014, 08:25 | #2 |
Thalion Webshrine
Join Date: Jan 2004
Location: Oxford
Posts: 14,448
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It is the same as a CD32 PSU and the 1541-II.
You can buy them very cheap http://www.vesalia.de/e_psu1541iicd32a590.htm Or use a PC PSU with an adapter http://amigakit.leamancomputing.com/...roducts_id=901 Or modify your A590 to use the Amiga for power http://members.iinet.net.au/~davem2/...ck/a500hd.html |
17 June 2014, 09:47 | #3 |
Ol'Cogger From yesteryear
Join Date: Sep 2013
Location: Mount Cotton, QLD, Australia
Posts: 41
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Alexh thanks for the info but I need the circuit diagrams.
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17 June 2014, 12:41 | #4 |
Registered User
Join Date: May 2010
Location: Helsinki, Finland
Posts: 1,341
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If they are the same, here is a schematic for the 1541-II PSU. Should be pretty easy to compare and verify that it matches your unit.
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17 June 2014, 22:33 | #5 |
Ol'Cogger From yesteryear
Join Date: Sep 2013
Location: Mount Cotton, QLD, Australia
Posts: 41
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AJK thanks for that but they're not the same. The A590 power supply has a voltage sense line on pin 3.
cheers |
19 June 2014, 07:53 | #6 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
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The A590 PSU is also a lot more powerful than the 1541-II PSU.
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25 June 2014, 00:42 | #7 |
Registered User
Join Date: Apr 2009
Location: Melbourne / Australia
Posts: 68
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Peter, I recently found a power supply that says '1541-II, 1581' on it, but it is substantially bigger than the normal 1541-II power supply. I have used that on an A590. It says it is only good for 1A on the +5V line but I suspect that is underrated because the A590 seems to work ok and the supply does not get hot.
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26 June 2014, 09:39 | #8 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,900
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Hope it doesn't end in tears.. The type plate has the max currents printed on it for a reason. This is everyone's personal call naturally, I'm not the PSU police. :-D
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27 June 2014, 03:08 | #9 |
Registered User
Join Date: Apr 2009
Location: Melbourne / Australia
Posts: 68
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Well the A590 does say 3.0A/5V and 1.0A/12V. I would suspect it would depend on the HD too, some of those old tank ones that sound like a 747 preparing for take off when they start up would probably be that worst case power consumption scenario.
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29 June 2014, 02:15 | #10 |
Ol'Cogger From yesteryear
Join Date: Sep 2013
Location: Mount Cotton, QLD, Australia
Posts: 41
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Looks like I'm going to have to find another power supply and another 50 pin Scsi drive. Have you looked at the prices on those suckers recently. To bad no one does a XT to CF adapter.
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03 July 2014, 16:56 | #11 |
Commodore Collector
Join Date: Aug 2001
Location: Austria
Age: 53
Posts: 944
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The A-590 psu has a relay which only switches when the A-500 is turned on. So, it is different than the CD-32 or 1541-II psu.
If the psu is dead, first have a look if there is a big power diode ? I would have to open a A-590 psu to have a look, but this diode breaks down very often in A-500 psu. Also, I would check the big elcos. |
04 July 2014, 09:25 | #12 |
Ol'Cogger From yesteryear
Join Date: Sep 2013
Location: Mount Cotton, QLD, Australia
Posts: 41
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Yeah there's a 400v (something uf) cap, can't recall the rating. The caps looked to have leaked but a check on them showed otherwise. Having said that there getting replaced anyway.
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