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 VoltureX
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A500 PSU with ticking noise
Posted on 16-May-2013 19:56:49
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Member
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Joined: 11-Sep-2011
Posts: 47
From: Denmark | | |
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| Hi.
I have a A500 PSU and when I switch it on without plugging it to the Amiga it has a ticking noise.
What can be the problem?
Is the safe to plug it to my Amiga 1200 just to test if the A1200 is working?
Thanks
Volt. _________________
Amiga Demo Scene II app 4 Droid phones:
Google's Play - Amiga Demo Scene II |
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lylehaze
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Re: A500 PSU with ticking noise
Posted on 16-May-2013 22:00:54
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Super Member
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Joined: 1-Sep-2004
Posts: 1142
From: North Florida - Big Bend area. | | |
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| @VoltureX
Most "switching" power supplies (which is just about all of them anymore) require a certain minimum load to regulate properly.
What you hear is probably the power supply trying to protect itself.
While it _might_ do no damage to the supply, I would suggest not running the supply for long without a load.
Even larger "PC" power supplies usually require a load resistor to the 3v3 rail for the supply to work properly when out of the computer. _________________
question=(2b||!(2b)) |
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Spirantho
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Re: A500 PSU with ticking noise
Posted on 16-May-2013 22:06:37
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Super Member
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Joined: 4-Jun-2004
Posts: 1045
From: Aberystwyth, Wales | | |
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| I've got A500 PSUs that do that - it's nothing to worry about (and is actually probably a good sign).
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Drewlio77
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Re: A500 PSU with ticking noise
Posted on 17-May-2013 4:00:57
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Cult Member
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Joined: 2-Jan-2008
Posts: 781
From: Woodstock, Ontario, Canada | | |
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| @Spirantho
Actually, when my A500 PSU made a ticking noise it was due to a blown fuse on the 5 volt line.
Drewlio77 |
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Drummerboy
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Re: A500 PSU with ticking noise
Posted on 17-May-2013 5:19:34
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Regular Member
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Joined: 3-Jul-2003
Posts: 377
From: Santa Fe, Argentina - San Jose Costa Rica | | |
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| @VoltureX
I remember that noise un any C128 PSU i had back in the 80s never know what happened and never happen anything.
_________________
Amiga 1000, 500, 600, 2000, 1200, 4000...
C= VIC 20 / 64 / SX64/ 128
Atari 600XL (SIC Cartdridge)
Atari 800XL (SIO2SD Unit)
Jay Miner`s Atari 2600 - Wood front -
"Amiga, this Computer have a Own Live" |
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VoltureX
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Re: A500 PSU with ticking noise
Posted on 17-May-2013 5:51:02
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Member
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Joined: 11-Sep-2011
Posts: 47
From: Denmark | | |
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| @Spirantho
Thanks for the replies. The PSU was working and didn't fry my Amiga :)
Volt. _________________
Amiga Demo Scene II app 4 Droid phones:
Google's Play - Amiga Demo Scene II |
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sundown
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Re: A500 PSU with ticking noise
Posted on 17-May-2013 18:14:45
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Elite Member
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Joined: 30-Aug-2003
Posts: 5120
From: Right here... | | |
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| @lylehaze
Quote:
| Even larger "PC" power supplies usually require a load resistor to the 3v3 rail for the supply to work properly when out of the computer. |
You don't even need any resistor now, there is a green wire on the connector, you just need to jumper it to the black (GND) wire next to to get the PSU running. You can then measure all the voltages without any load. Good test to verify the PSU works._________________
Hate tends to make you look stupid... |
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