Antec TruePower 2.0 TPII-550

[Wrog]

Re: Antec TruePower 2.0 TPII-550

Sorry for the long delay between followups; I had some RL stuff pop up (or pop out would be more descriptive)! The discoloration is definitely centered around D20. D21 is nearby but also tests fine. I am just now getting around to ordering the replacements, and wouldn't you know it? The UCC LXZ (565-1927-ND) is on backorder until sometime in October! I've scanned for a replacement but the specs don't seem to be as good as the LXZ in this size. Of this list, which would be the best to get (these are the 220uF 16V 6.3mm in stock at Digi-key):

Panasonic M
UCC SMG
Nichicon VR

There are a few others but are rated for only 1000 hours with a lower ripple rating. Thanks for the continued help!

[Toasty]

Re: Antec TruePower 2.0 TPII-550

Sounds good!

Please confirm that that diode is actually on the discolored area. There is another component nearby but I can't make it out. Just below that diode and right up against the transformer. Use a flashlight shown through the board to locate what sits right on the mark. Discoloration probably all caused by time/heat and not helped by the bad caps.

[Wrog]

Re: Antec TruePower 2.0 TPII-550

Reference designator is D20. Ran out of time to do any checking on it tonight, but will definitely follow up tomorrow. Thanks!

Seems fine physically, and on diode check it measures .549 in one direction and open in the other (seems OK). Will post again once I've recapped.

[Wrog]

Re: Antec TruePower 2.0 TPII-550

There is either a diode or resistor mounted on end between the 2 trafos. Verify that the part is not physically damaged and that if it's a resistor, that it is in tolerance to its markings. Reflow the solder to those pins.

Reference designator is D20. Ran out of time to do any checking on it tonight, but will definitely follow up tomorrow. Thanks!

[370forlife]

Re: Antec TruePower 2.0 TPII-550

Looking at that noflash image, that scorch is pretty dark. Definitely check out what toasty is pointing out.

[Toasty]

Re: Antec TruePower 2.0 TPII-550

There is either a diode or resistor mounted on end between the 2 trafos. Verify that the part is not physically damaged and that if it's a resistor, that it is in tolerance to its markings. Reflow the solder to those pins.

[370forlife]

Re: Antec TruePower 2.0 TPII-550

Just looks like heat discoloration.

[Wrog]

Re: Antec TruePower 2.0 TPII-550

Thanks for the information on selecting a 50v over a 35v, the reasons make perfect sense. While I don't buy caps in bulk, it's good to understand these things just in case I do in the future!

[Wrog]

Re: Antec TruePower 2.0 TPII-550

Scorch marks might just be dried glue. There's usually not much under the main transformer, some small parts near it that may have committed suicide. Look for any burnt resistors/capacitors/diodes, etc... around or under the transformer.

Sorry, I should have been more clear -- the scorch marks that I noticed were on the bottom of the PCB. See attached pics, the non-flash picture makes it look worse than it actually is, so I included one with a flash too.

[PCBONEZ]

Re: Antec TruePower 2.0 TPII-550

You're purdy cute in that helmet too!

[Toasty]

Re: Antec TruePower 2.0 TPII-550

You got a purty mouth.

[PCBONEZ]

Re: Antec TruePower 2.0 TPII-550

The 47uF shows up in most PSUs with voltages of 25v, 35v or 50v.
Of those I think I see 35v most often.
Basically it's an important cap so there is no reason not to use a 50v as it costs no more to upgrade.
-
You don't -have- to use 50v.
The original voltage should be okay as you are getting better quality caps.

Us guys [or at least I do] that buy caps in bulk just get the 47uF 50v and use them for the 25v and 35v 47uF caps too, rather that stocking 3 sizes of 47uF caps.

So: The upgrade is routine based on practical logistics and ecomonics strategies.
- Did that sound cool, or what?
In other words it's more of a habit than a requirement.
.

[Per Hansson]

Re: Antec TruePower 2.0 TPII-550

Just for my understanding, what's the reasoning behind bumping up the voltage from 35v to 50v on this cap?

It is a critical cap, if it fails 5VSB will go high and kill your mainboard
Increasing it's voltage rating is a small safeguard that will make the capacitor withstand voltage spikes etc better (If memory serves, which it well might not, I think Wizard did a test where it was found that there could be quite high voltage spikes on this capacitor...)

[Krankshaft]

Re: Antec TruePower 2.0 TPII-550

Will change the 47uF to a 50v and keep the rest the same. I had missed that modification in the other thread. Just for my understanding, what's the reasoning behind bumping up the voltage from 35v to 50v on this cap?

As a side note, I was examining the PCB last night a little more and noticed there are some minor scorch marks under the larger transformer. I'll post a picture this evening, but is this something to be concerned about?

You can always go higher in voltage on caps. For example I have 47uf caps at 50 volts but not 35 volts mainly because 35 is a weird value 25 is a more common value but since the case size difference between those voltage caps are minimal at such a low capacitance I stock them at 50 volts.

Just note that at higher capacitance's the size of the cap will change noticeably so you have to make sure the higher voltage value will fit. Also don't go too high in voltage when dealing with low ESR caps like 2 or 3 voltage steps up on the datasheet since ESR will rise as the working voltage increases.

Minor darkening of the board around components that heat up like transistors or transformers is normal.

[370forlife]

Re: Antec TruePower 2.0 TPII-550

Scorch marks might just be dried glue. There's usually not much under the main transformer, some small parts near it that may have committed suicide. Look for any burnt resistors/capacitors/diodes, etc... around or under the transformer.

[Wrog]

Re: Antec TruePower 2.0 TPII-550

Will change the 47uF to a 50v and keep the rest the same. I had missed that modification in the other thread. Just for my understanding, what's the reasoning behind bumping up the voltage from 35v to 50v on this cap?

As a side note, I was examining the PCB last night a little more and noticed there are some minor scorch marks under the larger transformer. I'll post a picture this evening, but is this something to be concerned about?

[PCBONEZ]

Re: Antec TruePower 2.0 TPII-550

Agree.

Use a 47uF to a 50v and everything else looks good.

[Toasty]

Re: Antec TruePower 2.0 TPII-550

Change the 47uF to a 50v:
http://search.digikey.com/scripts/Dk...name=P10321-ND

Plus it's 6¢ cheaper

Everything else looks fine.

Have Fun!

[Wrog]

Re: Antec TruePower 2.0 TPII-550

Thanks Toasty. Here's the list I've put together along with a marked up picture (I believe they are all correct, some I could not completely see due to angles). Some are also under coils.

Replace [2] 1200uF 200v 25nn Fuhjyyu LP with Chemicon KMQ 1200uF/200v (565-2959-ND)
Replace [4] 4700uF 10v 10mm Fuhjyyu TM with Samxon RS 3300/16v (from Badcaps.net)
Replace [2] 3300uf 16v 10mm Fuhjyyu TM with Samxon RS 3300/16v (from Badcaps.net)
Replace [2] 1000uF 10v 8mm Fuhjyyu TN with Nichicon PW (493-1747-ND)
Replace [1] 470uf 25v 8mm Fuhjyyu TN with Panasonic FC (P10274-ND)
Replace [1] 47uF 35v 6.3mm Fuhjyyu TN with Panasonic FC (P11232-ND)
Replace [1] 220uF 16v 6.3mm with Chemicon LXZ (565-1927-ND)
Replace [2] 22uF 50V 105c 5mm with Panasonic FC (P10318-ND)
Replace [1] 10uF 50V 105c 5mm with Panasonic FC (P10316-ND)
Replace [1] 1uF 50V 105c 5mm with Panasonic FC (P10312-ND)

Thanks for double checking!

[Toasty]

Re: Antec TruePower 2.0 TPII-550

Original mains caps are snap-in.

85°C on -input- caps is not a problem. The originals were 85's. Yes, 105 is "preferred" but not critical here. Everything else in there should be 105's.

I found BigPope to be high on shipping to US. For a similar Antec recap, the shipping was going to be $25. Nuts for 20 caps. Nor do I care for any site that does not post prices up front. I have no intention playing email tag asking for quotes and also feeling like there is some "game" going on with prices. Like a car dealer with no prices on the sticker.

Would you please post up what you are getting from where before you order? A quick review to be sure your on the right track.