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Old 29th August 2014, 10:08 PM   #1
skood is offline skood  Australia
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Default Strange PSU

I have a 24v switching psu that for some reason when hooked up to an amp makes the sound like a distorted mess like a wireless connection dropping in and out at the same time. It reads that it outputting 24v ; when i pull the plug out the music sounds normal for a couple of seconds before the power dissipates.

It did work properly for a while, and i have tested the amp with another psu and it's fine so definitely the psu.

Any ideas would be appreciated..
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Old 29th August 2014, 10:25 PM   #2
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Pulling too much current from the smps?
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Old 29th August 2014, 11:58 PM   #3
kevinkr is offline kevinkr  United States
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Bad output cap or rectifier?
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Old 30th August 2014, 09:59 AM   #4
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Turn off at the mains switch and see if the same normal sound for a couple of seconds.
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Old 30th August 2014, 10:09 PM   #5
skood is offline skood  Australia
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Quote:
Bad output cap or rectifier?
most likely, thanks for that - not much i can do about it but get a new one..
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Old 4th September 2014, 06:19 PM   #6
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You can flick the on/off switch a few times and if it's in-rush current, because then the capacitors will be charged and the in-rush protection will stop.
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Old 4th September 2014, 06:35 PM   #7
Mooly is offline Mooly  United Kingdom
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Quote:
Originally Posted by sofaspud View Post
Pulling too much current from the smps?
Could be.

It could also be the opposite, not pulling enough and so the SMPS enters a burst mode.
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