Computer PSU 4k -12vdc light off...

[jwhmca]

Hey Guys,

The computer crashed... no monitor etc... -12LED is off on the computer PSU. No shorts found on the transistors...

Can I just swap the reg cards around to see if it's bad? Seems like I heard you could.

Any other tests things to check if missing one supply.

Fan vent holes almost totally clogged!

[sintech]

Yeah, first thing is to swap the regulator boards around, these are all identical (apart from the Hang Regulator in the end slot)

[jwhmca]

Yeah, found the -12 card and an "OPEN Primary" transformer.

I've seen a few people talking about a sub for the OEP K3020E , but I havent found any confirmed "yes, it worked."

[sintech]

Yeah, just going through my spares (all from SSL)

[jimlfixit]

Hi Andy
Seeing these pictures of OEP transformers reminds me that I used to buy stuff from them many years ago. A guy called Geoff (or Jeff) who used to work at SSL, left there and co-formed OEP which I think stands for Oxford Electrical Products from memory. They were based close to SSL in Oxfordshire but I have no idea where they are now or even if they still exist. Just noticed the phone number in one of the pictures (+44 1993 883214) which is a local area near Long Hanborough and Witney in Oxfordshire, UK.

Hope this proves useful to someone, somewhere? Regards all from Jim Lassen.