AT Power Supply Fair Electronics CPS-220 squeaking noise \ VOGONS

AT Power Supply Fair Electronics CPS-220 squeaking noise

Topic actions

First post, by Fairy_Dust

Posted on 2018-09-01, 21:35

Fairy_Dust Offline

Rank Newbie

Rank: Newbie
Posts: 6
Joined: 2018-04-20, 17:11

Hey everyone,

I have a Fair Electronics CPS-220 power supply in my old Colani Tower PC . Recently I decided to recap the power supply in order to make it future proof.
The capacitors I chose had the same capacity but I chose their Voltage rating one step higher.( 25V instead of 16V ) After reinstalling the PSU ,the computer boots up fine, but unfortunately the PSU started to make some weird squeaking noises. Now I have the impression, I did something wrong ??

Does anyone had similar experience with such Issues or similar sounds and knows how to proceed in such a case ?? ( I think it is the coil )

I would appreciate any advice , best regards

Sam

Last edited by Fairy_Dust on 2018-09-01, 23:23. Edited 2 times in total.

Reply 1 of 3, by theamtrakvirus

Posted on 2018-09-01, 23:06

theamtrakvirus Offline

Rank Newbie

Rank: Newbie
Posts: 73
Joined: 2016-01-24, 03:01
Location: USA

Could it be the fan? You might try oiling the fan in it or soldering on a new fan for it.

Reply 2 of 3, by Fairy_Dust

Posted on 2018-09-01, 23:21

Fairy_Dust Offline

Rank Newbie

Rank: Newbie
Posts: 6
Joined: 2018-04-20, 17:11

Hey, unfortunately not, that was one of my first thoughts too and with disconnected fan the high bleep skueaky sound is still there. 😐

Reply 3 of 3, by gdjacobs

Posted on 2018-09-02, 00:59

gdjacobs Offline

Rank l33t++

Rank: l33t++
Posts: 7655
Joined: 2015-11-03, 05:51
Location: The Great White North

If you can find someone with an oscilloscope, it would probably be worth testing the outputs for ripple. This could be happening due to an ESR mismatch on the pi filter caps resulting in unstable circuit regulation.

All hail the Great Capacitor Brand Finder

Go to top of page Go to top of page

Back to General Old Hardware