Raidmax RX-380K (ky-480atx)

[bsweasel]

So I have this Raidmax SMPS (I know yuck), but I would kinda like to revive it. I've been poking around with my novice skills and am a bit lost. I only has +5v standby power, nothing else. I've replaced some caps that failed my ESR tests, checked the mosfets on the secondary side. Check some diodes and resisters in the area near the hot zone around the mosfets. still no go. Looking for some expert guidance if anyone can help me.

[370forlife]

Re: Raidmax RX-380K (ky-480atx)

Throw it away. It's really not worth it. If you want the educational experience, choose a "not as crap" crap brand to rebuild, putting parts into these low end sunpro units is kind of pointless as they are just terrible no matter what.

[Th3_uN1Qu3]

Re: Raidmax RX-380K (ky-480atx)

Primary side switching transistors (usually 13007s on this kind of units) failed open. Very common failure mode. But agreed with 370forlife - they are junk.

[bsweasel]

Re: Raidmax RX-380K (ky-480atx)

I don't dispute they are junk, but it is the only one I have to work on, and it is exactly what 370forlife says, an "educational experience". I was just testing the 13007k and found one that reads both ways....so I'm assuming this is the bad one...Now I just need to find a donor....I'm surely not going to spend any money on new parts for this pile.

[Th3_uN1Qu3]

Re: Raidmax RX-380K (ky-480atx)

If one is indeed shorted, the other one is guaranteed open. When the primary side isn't working but the fuse hasn't blown, it always means that at least one primary switch has failed open circuit.

[bsweasel]

Re: Raidmax RX-380K (ky-480atx)

The Unique, your right! It was the 13007, I found a donor, tested the 13007 and it was good. I slapped it in and it fires up. So, no money spent, all donar parts. 4 caps, 2 transistors. I spent some time testing and poking, but it was worth it just in learning and practicing my testing skills. Now yes I realize I brought back to life a complete pile. But it will be a good backup PSU in a pinch. Thanks for the tips guys! This is why I love this site and its forums.

[momaka]

Re: Raidmax RX-380K (ky-480atx)

But it will be a good backup PSU in a pinch.

Yes, a good back up PSU in case you use a really crappy one and it doesn't kill your computer. Then you can put this one in there and make sure it definitely kills your computer.

No seriously, don't use this power supply in any computer, ever. It's just asking for trouble.

If you want, keep it for parts or use it only to test electronics that don't care much about ripple (such as motors, lamps, etc.)

[goodpsusearch]

Re: Raidmax RX-380K (ky-480atx)

Cheap power supplies that can be somehow decent after some modifications and recap are very easy to get.

That raidmax is NOT one of them!

[c_hegge]

Re: Raidmax RX-380K (ky-480atx)

I love using cheapies for fireworks. It's easy now that I have a load tester.