Repair or part it?

[Colt45ws]

Its a "VAV" 300W that I used in my home server for 3..or 4 years. Which is a Duron on a K7S5A (no 12V). It only got a UPS a couple months before I replaced it. It was still running fine, or so I thought until I opened it.




Input caps are "Viva" 680uF @ 200V
Outputs are mostly viva also. 3x 3300uf 10V and a single 3300uF 16V. All these are blown. I cant tell what the little ones are as far as rating, but they are a mix of Capxon, and Jun Fu.

[ratdude747]

Re: Repair or part it?

part it. the heatsinks are too small, as are the filtering caps. but, on the bright side, lots of good parts:

2 x caps

choke

bridge rectifier

coils (if you dare to try removing them...

there is no way one could get 300w out of that thing.

[Colt45ws]

Re: Repair or part it?

Thats what I was leaning towards..

The part number in the middle says 240ATX...hmm wonder what that means. :P

[momaka]

Re: Repair or part it?

That's one ancient Deer/L&C power supply! Probably the most well-built Deer I've seen from that era.
If you're intending to repair it so that you can use it in the same home server, it should be okay for that. Couple of things to point out, though: by now, most (if not all) of the caps are probably toast (particularly the Viva ones). Unless you have an ESR meter to verify them, replace everything down to the smallest ones. Even the two big 200v ones are probably bad so get them too. Also, the big, low-ohm resistors on the secondary side seem to produce quite a lot of heat. You might want to remove them after you put the new caps (should you repiar it, that is).

there is no way one could get 300w out of that thing.

Actually it might do 300 watts. Main transformer is of good size, and if you look at the 3rd picture, you'll see that the primary transistors are big enough for the job too. The heatsinks are okay.

[momaka]

Re: Repair or part it?

Double-post, sorry. 10-minute edit limit got me ...

So, to answer the question in your title, I guess that depends up to you. New caps for this PSU might cost more than usuall (since it's likely that you will have to replace the 200v ones) and chances are that you can probably find a decent PSU for a similar price. But if you just want to fix this PSU for fun, then it should be okay as Deer PSUs are usually reliable with good caps.

[Colt45ws]

Re: Repair or part it?

I think this was purchased around..I want to say '00.
I stripped it of anything that looked semi usable. The only thing I recognized is the bridge rectifier, which has part # PBU605 on it.
I got a couple coils off it.
I also got a yellow square thing that has HQX and 0.33uF 250V on it..
2x 2SC2625
1x BYQ28E
1x KA7805
1x C3150
1x S30D40C
1x SBL2040 PT

[stj]

Re: Repair or part it?

keep the power inlet connector.
i use them on all the stuff i get with captive power cables.

i fucking hate captive power cables!!!

[Colt45ws]

Re: Repair or part it?

I did keep it. I tossed it into my box of useful junk.

[370forlife]

Re: Repair or part it?

I think this was purchased around..I want to say '00.
I stripped it of anything that looked semi usable. The only thing I recognized is the bridge rectifier, which has part # PBU605 on it.
I got a couple coils off it.
I also got a yellow square thing that has HQX and 0.33uF 250V on it..
2x 2SC2625
1x BYQ28E
1x KA7805
1x C3150
1x S30D40C
1x SBL2040 PT

I'm fairly certain it could do 300W. Looks like you parted it out already. Did you throw it away yet? I was wondering if you could get the transformer out of it. I might be able to use it in my deer.

Also, the two little things in shrink wrap next to the primary caps are MOV's, take those too.

[Colt45ws]

Re: Repair or part it?

Maybe. The big main one?

[370forlife]

Re: Repair or part it?

Yup, the one that says ERL-35 CD on it.

Part out all the parts of the input filter, all the X caps (the yellow squares,) Y caps (blue ceramic type caps,) and coils. I would also take out things like the pi filters. I usually keep the PCB's around in case I need some little resistor or something for a different psu. All these things are useful when fixing other psu's.

[Colt45ws]

Re: Repair or part it?

I got the transformer.
I also just burned myself bad because for some reason I grabbed the hot end to put it away since I thought it was unplugged for the last 2 hours... It was not.

[370forlife]

Re: Repair or part it?

Ow. I've done that with a cheapie soldering iron, but haven't dared to with my 599 C hakko.

[Colt45ws]

Re: Repair or part it?

[etnietering]

Re: Repair or part it?

That's a decent sized transformer. Very nice

On a somewhat related note - I've never grabbed a hot soldering iron, but one time in chemistry class my friend picked up a Bunsen burner immediately after turning it off. It burned almost his entire palm. I had a good laugh about that one hehehe

And I'd say hang on to the whole thing - you never know when something from it will come in handy.

[370forlife]

Re: Repair or part it?

Yup thats the right transformer all right. A real 35 sized one too.

[momaka]

Re: Repair or part it?

Colt45ws, I have a question for you... Do you know what C25 is in your PSU (i.e. what voltage and uF rating)? I have a Deer PSU that is very similar to yours, but on mine that cap was blown to pieces when I got it (only its leads were remaining). Seems like a common failure too as I saw another old L&C here with the same cap blown. Here's the post actually:
https://www.badcaps.net/forum/showpo...&postcount=254
Cap should be near the PWM controller on the secondary side. Thanks.

[smason]

Re: Repair or part it?

keep the power inlet connector.
i use them on all the stuff i get with captive power cables.

i fucking hate captive power cables!!!

No kidding. My new Samsung 50" Plasma has a captive cable. I was pi$$ed when I saw that.

[Colt45ws]

Re: Repair or part it?

Colt45ws, I have a question for you... Do you know what C25 is in your PSU (i.e. what voltage and uF rating)? I have a Deer PSU that is very similar to yours, but on mine that cap was blown to pieces when I got it (only its leads were remaining). Seems like a common failure too as I saw another old L&C here with the same cap blown. Here's the post actually:
https://www.badcaps.net/forum/showpo...&postcount=254
Cap should be near the PWM controller on the secondary side. Thanks.

C25 is a 47uF 50V part.

[momaka]

Re: Repair or part it?

C25 is a 47uF 50V part.

Much appriciated, thanks. I might revive mine some day just for the sake of it. I'm particularly interested to see that 5vsb circuit in action - it's self-oscilating with no feedback and produces ~15v. KA7805 then regulates that output to 5v for the 5vsb.