Author Topic: Trying to remove the switch and mains socket of ATX PSU so I can remove the PCB  (Read 548 times)

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Offline seanspotatobusinessTopic starter

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I have a broken XFX ATX PSU which I was hoping to fix. I'll never trust it to power my PC again but it might be useful to power something's less important. I'm falling at the first hurdle of removing the PCB from the casing. Specifically, I think the problem is the mains cable socket and the power switch which are attached to the sheet metal which constitutes the PSU casing.

I attached photographs of the switch and socket and the reverse side which is obscured by some sort of metal and plastic shield which will not budge. Can these be removed without damaging anything?

I am taking care to avoid contact with the capacitors, although they probably have discharge resistors. I might apply a 10K resistor across them to be sure.
 

Offline WattsThat

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That metal shield looks like it is mounted to the pc board with plastic rivets. Best to look to see how the board is held in the case, cannot see that from your photos that are too close to see anything useful, it’s not the shield keeping everything in place.
 

Offline Geronimo

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I would guess you should have some screws down there on the corners of the PCB holding it down to the metal chassis.
Try to find and remove those if you have not done yet.

On the right side of the shield I can see some cables (brown and blue) with the noise suppressing ferret.
It looks to me that there is some space left to pull the board out if you can tilt it up and away from the power switch and main power connector.

BTW: If you have an incandescent light buld around, maybe from an old desk lamp.
Switch it on and use the pins of the power plug to cross link the heat sinks with the metal chassis and cross link ground and 12V from the outlets of the PSU.
Thats how I discharge the caps when working on such a device. Your way with the discharge resistor is basically the same, my light bulb however gives me some noitceable reply.  ^-^
 


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