Quality of Premier LC-B300ATX

[Rainbow]

A dead Premier LC-B300ATX...let's see what's inside

WTF are drops of the hot glue everywhere?

Hot glue was dripping all over the place

A bulged cap

Dust caught in the hot glue on the coil

A "high-quality brand-name" fan, completely stuck - that's why the hot glue is all over there

5A fuse

The table says that 5A is for 180-234W PSU... The label on the outside says 300W


Also the rectifier on 5V rail was shorted. No wonder - it was rated only 10A and even not tightened to the heatsink strongly enough.

[999999999]

Re: Quality of Premier LC-B300ATX

While it is low quality, odds are fair it would still be working if the fan hadn't seized up. Personally I always replace such fans, or on someone else's system if they are so cheap it's offensive I at least relube them - either of these being preemptive, at first opportunity before any signs of a problem with the fan.

[Rainbow]

Re: Quality of Premier LC-B300ATX

I already replaced the fan, rectifier (the "new" one is rated 20A - it comes from a crappy 200W PSU and is still better than the original one) and caps and it works.
The fan runs fast (and thus loud) in these PSUs - which is probably needed to keep the temperature of the overloaded components down (~200W PSU marked as 300W).

[hardwareguy]

Re: Quality of Premier LC-B300ATX

Wait, I know how it does it! See that "150% efficiency" sticker........ 200W in, 300W out right? :p

Just kidding, I ain't that stupid!

On the crapometer, I give it an 8/10......10 is reserved for the 150W Powmax relabeled as 500W with Fuhjyyus for every cap!

[Rainbow]

Re: Quality of Premier LC-B300ATX

Most of the caps were HERMEI (and one G-Luxon). Still better than Fuhjyyu

[japlytic]

Re: Quality of Premier LC-B300ATX

That's yet another Deer/L&C unit...
"Special support for 3D VGA card" could mean that it has PCI-E +12V connectors on it.
This label is another form of advertising...

[Sparky]

Re: Quality of Premier LC-B300ATX

L&C made. Could tell from the LC in the model#. My bro had a rosewill PSU in his system that was L&C, supposedly 350W but I doubt it considering the lack of components inside. Was pumping 12.7V and 4.76V on the 12V and 5V rails. Piece of crap, stuck it in my scrap pile for now.

[999999999]

Re: Quality of Premier LC-B300ATX

Something else worth mentioning is that often PSU that ran for awhile after the fan seized, will bake the parts until the PSU isn't a good candidate for repair, as you may replace faulty parts and it may work, but the remaining life of the unit is compromised. Insufficient information to know if it would apply to this PSU or not, often only in retrospect (having repaired and seen it fail again later) can you be certain.

It may depend a lot on how long it baked, how hot (a well cooled chassis with other fans will still passively move a bit of air through a PSU if it isn't very clogged with dust), and how well it was built.

[Rainbow]

Re: Quality of Premier LC-B300ATX

That's yet another Deer/L&C unit...
"Special support for 3D VGA card" could mean that it has PCI-E +12V connectors on it.
This label is another form of advertising...

Yes, another DEER PSU.
It doesn't have any special connectors - just standard 20-pin ATX and 4-pin ATX12V.

[Behemot]

Re: Quality of Premier LC-B300ATX

I have this (under L&C brand) recaped with Samxon GC's, was working fine with fanless VIA C3, but GC's aren't exactly for PSU's Currently changing them for some Nichicon, Rubycon etc. caps I have from my 500W Seasonic (mostly 1500 uF changed for 3300 uF there) and some MoBo's.

But this 15 A thing on 12V rail is laughable (or it's the 150% efficinecy again?)...I'd like to have at least 10 A (Thoroughbred-B 2400+, probably won't ever reach it, but you know), so the 10A diode rectifier is not enough I guess Good I have some old AT PSU's here

[Behemot]

Re: Quality of Premier LC-B300ATX

Oh man oh man oh man! I got another version of this, the „original“ LC Premier. Man, crap, there are the two famous diodes soldered together, channeled out through the very heatsink:-D

I won't do anything with this, it is really too much for me to handle. This PSU is capable of some 200 W (at most) long-term even if ugpraded, and there is so many things to ugprade…I will delaborate it for parts.

[b700029]

Re: Quality of Premier LC-B300ATX

I have a no-name 150W AT power supply from the mid 80s with 2x FR302s on a bracket for the 12V rail, although it was only rated for 4A according to the label so they're within spec. 20A on the 5V handled by 4(!) FR602s in parallel too.

[kaboom]

Re: Quality of Premier LC-B300ATX

Oh, Deer! They've thwarted physics and made a power supply that cools its surroundings, and uses the recovered energy to "produce mo' powa!"

How about I belt a generator to a motor and wire the motor to the genny's output?

Wait, that wouldn't work, the belt has losses going over those pulleys!

[PeteS in CA]

Re: Quality of Premier LC-B300ATX

First Law of Thermodynamics: You can't win.

Second Law of Thermodynamics: You LOSE!