Refurbishing LiteOn A4000D PSU?

alexh · 21 September 2009, 12:44

I want to refurbish a working LiteOn A4000D PSU.

I've started by removing all the rust from the outside, giving it a light coat of temperature resistant primer.

Removed all the dust using compressed air and replaced the fan with an almost silent dust proof one with an anti-vibration gasket & rubber grommets on the screws.

The liteOn version has reasonable air flow compared to the other A4000D PSU so no metal cutting was required, plus it has a higher rating.

Before I swap it in for the old noisy one in my A4000D can anyone point me in the direction of a decent guide as to which capacitors to replace. Types, sizes etc.

Seems nuts to go to all this trouble only for it to fail a few weeks in due to bad capacitors.

Please do not reply "All of them!"

Firthy2002 · 21 September 2009, 16:16

Quote:

Originally Posted by alexh

Please do not reply "All of them!"

They'll all fail sometime...

alexh · 21 September 2009, 18:00

Quote:

Originally Posted by Firthy2002

They'll all fail sometime...

Very helpful, NOT. You're such a guru, I bet you've changed capacitors before in hundreds of Amiga PSU's right?

On a more sensible note, anyone know anything about the subject? Anyone attempted it before?

rkauer · 21 September 2009, 20:11

I did.

The ones who fails more often are the output filters (values depends on the PSU you have) and the high voltage pair.

21 September 2009, 12:44	#1
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,343	Refurbishing LiteOn A4000D PSU? I want to refurbish a working LiteOn A4000D PSU. I've started by removing all the rust from the outside, giving it a light coat of temperature resistant primer. Removed all the dust using compressed air and replaced the fan with an almost silent dust proof one with an anti-vibration gasket & rubber grommets on the screws. The liteOn version has reasonable air flow compared to the other A4000D PSU so no metal cutting was required, plus it has a higher rating. Before I swap it in for the old noisy one in my A4000D can anyone point me in the direction of a decent guide as to which capacitors to replace. Types, sizes etc. Seems nuts to go to all this trouble only for it to fail a few weeks in due to bad capacitors. Please do not reply "All of them!"

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21 September 2009, 20:11	#4
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	I did. The ones who fails more often are the output filters (values depends on the PSU you have) and the high voltage pair.

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