Failed TOPOWER TOP-500WB

[budm]

Re: Failed TOPOWER TOP-500WB

Was the old filter cap rated at 450VDC? that one on the board right now show 400VDC which will be marginal.
Typical boosted voltage is between 380~400VDC range.

[kaboom]

Re: Failed TOPOWER TOP-500WB

You guys rock! It's back up and running I had forgotten that I had already instinctively ordered a few STTH12R06D diodes to have on hand, so I replaced that (and put the ferrite beads back on), replaced the film cap with the red one I had, had a GBU808 on hand, and actually found a 10A heatshrinked fuse. Only on the first start up, it took about 2 seconds to turn on after flipping the switch. Is this because the protection circuitry had been tripped previously? Another PSU saved by the knowledge of badcaps. Thanks guys, I couldn't have done it without your input, and now I've learned quite a few things.


Yeah Most of the PSU's I have in service have no PFC. If the coil isn't in the way of airflow, I like having PPFC.

Congrats, another one fixed!

After it's running awhile, does it come right back or is there still that delay? Don't forget, all the small caps in the PFC/PWM control sections had completely discharged while you worked on it, so the aux filter caps and softstart delay caps, would've needed time to charge.

I'd make sure to get the correct film cap. You may want to clean that heatsink up, and clean/replace the insulator on the PFC rectifier. If you move El Teapo out of the way, this'll be easier. Use a q-tip.

If you're feeling adventurous, *carefully* touch that film cap after it's been under load, after unplugging, of course.

You don't know the ratings of your subbed in cap, so proceed carefully til you've got one with known ampacity.

Topower, or not Topower, that is the question!

[momaka]

Re: Failed TOPOWER TOP-500WB

Yay, another save. Nice work!

Topower, or not Topower, that is the question!

I think that is signature-worthy material there. Heck, if I make a T-shirt out of this and wear it around, no one will know what it means other than one of us PSU freaks on BCN lol.

[Pentium4]

Re: Failed TOPOWER TOP-500WB

Was the old filter cap rated at 450VDC? that one on the board right now show 400VDC which will be marginal.
Typical boosted voltage is between 380~400VDC range.

The one I put in there is from the picture on the first page and is 450V rated. I actually pulled it from a CWT PSH platform based Thermaltake Purepower 550W. So, the cap must be fairly capable?

After it's running awhile, does it come right back or is there still that delay? Don't forget, all the small caps in the PFC/PWM control sections had completely discharged while you worked on it, so the aux filter caps and softstart delay caps, would've needed time to charge.

Now it takes about a second. However, I think that's partially to do with the fan, it spins up very slowly. It did that before though. Okay, that makes sense about the caps needing to charge. That's one of the first things I noticed about this PSU, was how few amount of small lytics were in this design.

I'd make sure to get the correct film cap. You may want to clean that heatsink up, and clean/replace the insulator on the PFC rectifier. If you move El Teapo out of the way, this'll be easier. Use a q-tip.

Such as 155K 450V? I have scrapped PSU's that may have one. It seems that Topower liked sourcing low quality film caps. (Wait for the other one I post!) Yeah, I'll clean it up. Wanted to make sure it worked first By the way, that arc partially melted the sleeve. If you look at the pic of it that I took, it looks like that even after scrubbing. It's very rough in that spot.

Topower, or not Topower, that is the question!

Ha!

[kaboom]

Re: Failed TOPOWER TOP-500WB

Such as 155K 450V? I have scrapped PSU's that may have one. It seems that Topower liked sourcing low quality film caps. (Wait for the other one I post!) Yeah, I'll clean it up. Wanted to make sure it worked first

Figured... I've done similar for "testing purposes."

Try one of these:
http://www.mouser.com/ProductDetail/...rdYQruc8JTc%3d
http://www.mouser.com/ProductDetail/...fmcIJvWjwGY%3d
http://www.mouser.com/ProductDetail/...FDysY4iiTAc%3d

Ha!

Glad you liked that!

I think that is signature-worthy material there. Heck, if I make a T-shirt out of this and wear it around, no one will know what it means other than one of us PSU freaks on BCN lol.

[Pentium4]

Re: Failed TOPOWER TOP-500WB

Heck, if I make a T-shirt out of this and wear it around, no one will know what it means other than one of us PSU freaks on BCN lol.

I love this idea

Figured... I've done similar for "testing purposes."

Try one of these:
http://www.mouser.com/ProductDetail/...rdYQruc8JTc%3d
http://www.mouser.com/ProductDetail/...fmcIJvWjwGY%3d
http://www.mouser.com/ProductDetail/...FDysY4iiTAc%3d

Excellent. I'll probably go for the one in the middle.

Glad you liked that!

Love it. You are the master of puns around these here parts

[everell]

Re: Failed TOPOWER TOP-500WB

I think that is signature-worthy material there. Heck, if I make a T-shirt out of this and wear it around, no one will know what it means other than one of us PSU freaks on BCN lol.

BCN T=shirt???

Good idea, where can we buy one!