the gutless, bloated, and fried power supply hall of shame - Page 6

**c_hegge** · 11-22-2010, 01:14 AM

This was shawly not a 500W like it claimed to be. Notice the heat damage on the output. The wires were melted near the PCB. The funny thing is that when I peeled off the label with the SHAW brand, there ws another label claiming it was a Ritmo. Any ideas who made it? Maybe TaiwanBreakDownComponents Company? The heatsinks were OK-ish, but the 5vsb transistor was a total joke - about the same size as the one on kc8's echo star 480.

**Agent24** · 11-22-2010, 03:42 AM

I've got a some 300 Watt Hyenas (Deer) that look better than that thing.

**c_hegge** · 11-22-2010, 04:14 AM

I got a good picture of the wires. I stuck the 12v ones out (which were melted together) so you could see how discoloured they were.

**goodpsusearch** · 11-22-2010, 06:18 AM

Linkworld

**momaka** · 11-22-2010, 05:48 PM

That looks absolutely horrible. Did the fan seize? If not, I wonder what caused the thermal runaway. It doesn't help either that they put big low-ohm loading resistors on the secondary.
And, yes, you can tell the 5vsb transistor was undersized - note the burn marks on its spot on the PCB.

Quote:

Originally Posted by c_hegge

TaiwanBreakDownComponents

Probably a daughter company of HongKongFlyApart

**c_hegge** · 11-22-2010, 08:10 PM

The fan did indeed quit on this PSU, which is probably why it got so hot.

**Agent24** · 11-22-2010, 08:34 PM

You wonder why people don't notice their fans making hideous grinding noises.... A friend of mine had a 133Mhz Pentium and the PSU fan was in terrible condition.

I did not know about capacitor problems at that time but luckily we just replaced the whole PSU.

**c_hegge** · 11-22-2010, 10:07 PM

They probably notice, but because the PC still appears to be working, they don't care.

**goodpsusearch** · 11-22-2010, 10:33 PM

Quote:

Originally Posted by c_hegge

They probably notice, but because the PC still appears to be working, they don't care.

qft

Btw, here in Greece, I see many Linkworlds (LPQ, LPH or LPK) that use Sleeve Bearing Globe Fans and as they work at full speed all the time they fail quite often.

**c_hegge** · 11-30-2010, 03:31 AM

Sky 550 watt. It looks like TaiwanBreakDownComponents Company got the transformer right, for once as it's a real 35 size, but everything else is wrong. The transient input filtering is missing (other than only 2 Y-caps), the primary switchers claim to be 13009s, but they look too small. On the secondary, we have a 16A fast recovery on the 12v and 20A schottkys for the other two rails. All of the caps are BH. The primaries are 470uF. All of the rails have a pair of 1000uF caps on them, except for the -12, which has a single 470uF. The fan looks like an off-brand (HongGu). Probably could be re-built like my rexpower, but I'm not in any mood that at the moment, so it will probably just die a spectacular death on my load tester or get the sledge hammer treatment.

**ratdude747** · 11-30-2010, 06:07 AM

correct me if i am wrong, but it appears that the grounding pin on the AC connector goes nowhere

i would desolder the transformer out of it and find a junk small one to put in before you fry... the tranny might be good for a unit with a small tranny but good everything else

500w mein ezel, das ist sehr schlecht! (english: 500w my ass, that (power suppy) ist very bad!)

complete donkey poo...

**c_hegge** · 11-30-2010, 02:04 PM

The ground wire does actually connect to the case. It's just not easy to see in the picture. But it is still a gutless wonder.

**c_hegge** · 11-30-2010, 11:06 PM

It blew up at 277 watts on the load tester. Here's the carnaige

**momaka** · 11-30-2010, 11:37 PM

Shame. It didn't look that bad actually. Definitely not 500W, but I would have expected it to do 250W continuous, maybe 300W for short durations.
At least you got spare parts now

.

**c_hegge** · 12-01-2010, 12:54 AM

Quote:

Originally Posted by momaka

...It didn't look that bad actually...

Yes it did. It had no PI filter coils on the secondary and no way of adding them.

**goodpsusearch** · 12-01-2010, 05:41 AM

What blew in it?

**c_hegge** · 12-01-2010, 05:54 AM

Not sure. The primary swithers looked OK, although I didn't test them and they had gotten so hot that the plastic rings around the screws had melted. A few of the nearby resistors looked burned out, though. The burn mark is actually almost invisible on the component side of the PCB. Unforunately, I can't get any more pics as after it blew up, I scavenged the transformer and wires and gave it the sledge hammer treatment.

**370forlife** · 12-01-2010, 03:01 PM

Looks like the primary switchers blew out.

**c_hegge** · 01-26-2011, 04:06 AM

Here's another shocker. Tiny transformer, miniscule heatsinks and half a PCB. The best part is, it's an FSP (more specifically, a Gigabyte "300W"). It did actually do 320W on the load tester, but the DMM wouldn't settle when I was reading the voltages.

**goodpsusearch** · 01-26-2011, 04:32 AM

lol

It must be loud.

11-22-2010, 03:42 AM	#102
Agent24 I see dead caps Join Date: Oct 2007 City & State: Hiding inside a plated-through hole My Country: New Zealand Line Voltage: 230VAC 50Hz I'm a: Hobbyist Tech Posts: 4,698	Re: the gutless, bloated, and fried power supply hall of shame I've got a some 300 Watt Hyenas (Deer) that look better than that thing.

11-22-2010, 06:18 AM	#104
goodpsusearch Badcaps Veteran Join Date: Oct 2009 City & State: Thessaloniki, Greece My Country: Greece Line Voltage: 230VAC 50Hz I'm a: Knowledge Seeker Posts: 2,137	Re: the gutless, bloated, and fried power supply hall of shame Linkworld

11-22-2010, 08:10 PM	#106
c_hegge Badcaps Veteran Join Date: Sep 2009 City & State: North Coast, NSW My Country: Australia Line Voltage: 240V 50Hz I'm a: Professional Tech Posts: 5,052	Re: the gutless, bloated, and fried power supply hall of shame The fan did indeed quit on this PSU, which is probably why it got so hot.

11-22-2010, 08:34 PM	#107
Agent24 I see dead caps Join Date: Oct 2007 City & State: Hiding inside a plated-through hole My Country: New Zealand Line Voltage: 230VAC 50Hz I'm a: Hobbyist Tech Posts: 4,698	Re: the gutless, bloated, and fried power supply hall of shame You wonder why people don't notice their fans making hideous grinding noises.... A friend of mine had a 133Mhz Pentium and the PSU fan was in terrible condition. I did not know about capacitor problems at that time but luckily we just replaced the whole PSU.

11-22-2010, 10:07 PM	#108
c_hegge Badcaps Veteran Join Date: Sep 2009 City & State: North Coast, NSW My Country: Australia Line Voltage: 240V 50Hz I'm a: Professional Tech Posts: 5,052	Re: the gutless, bloated, and fried power supply hall of shame They probably notice, but because the PC still appears to be working, they don't care.

11-30-2010, 06:07 AM	#111
ratdude747 Black Sheep Join Date: Nov 2008 City & State: Madison, IN My Country: USA Line Voltage: 120VAC 60Hz I'm a: Professional Tech Posts: 16,615	Re: the gutless, bloated, and fried power supply hall of shame correct me if i am wrong, but it appears that the grounding pin on the AC connector goes nowhere i would desolder the transformer out of it and find a junk small one to put in before you fry... the tranny might be good for a unit with a small tranny but good everything else 500w mein ezel, das ist sehr schlecht! (english: 500w my ass, that (power suppy) ist very bad!) complete donkey poo... __________________ (Insert witty quote here) Last edited by ratdude747; 11-30-2010 at 06:09 AM..

11-30-2010, 02:04 PM	#112
c_hegge Badcaps Veteran Join Date: Sep 2009 City & State: North Coast, NSW My Country: Australia Line Voltage: 240V 50Hz I'm a: Professional Tech Posts: 5,052	Re: the gutless, bloated, and fried power supply hall of shame The ground wire does actually connect to the case. It's just not easy to see in the picture. But it is still a gutless wonder.

11-30-2010, 11:37 PM	#114
momaka master hoarder Join Date: May 2008 City & State: VA (NoVA) My Country: U.S.A. Line Voltage: 120 VAC, 60 Hz I'm a: Hobbyist Tech Posts: 10,862	Re: the gutless, bloated, and fried power supply hall of shame Shame. It didn't look that bad actually. Definitely not 500W, but I would have expected it to do 250W continuous, maybe 300W for short durations. At least you got spare parts now .

12-01-2010, 05:41 AM	#116
goodpsusearch Badcaps Veteran Join Date: Oct 2009 City & State: Thessaloniki, Greece My Country: Greece Line Voltage: 230VAC 50Hz I'm a: Knowledge Seeker Posts: 2,137	Re: the gutless, bloated, and fried power supply hall of shame What blew in it?

12-01-2010, 05:54 AM	#117
c_hegge Badcaps Veteran Join Date: Sep 2009 City & State: North Coast, NSW My Country: Australia Line Voltage: 240V 50Hz I'm a: Professional Tech Posts: 5,052	Re: the gutless, bloated, and fried power supply hall of shame Not sure. The primary swithers looked OK, although I didn't test them and they had gotten so hot that the plastic rings around the screws had melted. A few of the nearby resistors looked burned out, though. The burn mark is actually almost invisible on the component side of the PCB. Unforunately, I can't get any more pics as after it blew up, I scavenged the transformer and wires and gave it the sledge hammer treatment. Last edited by c_hegge; 12-01-2010 at 05:56 AM..

12-01-2010, 03:01 PM	#118
370forlife Large Marge Join Date: Aug 2008 City & State: Kalamazoo, MI My Country: United States Line Voltage: 0-120VAC 60Hz I'm a: Hobbyist Tech Posts: 2,924	Re: the gutless, bloated, and fried power supply hall of shame Looks like the primary switchers blew out. __________________

01-26-2011, 04:32 AM	#120
goodpsusearch Badcaps Veteran Join Date: Oct 2009 City & State: Thessaloniki, Greece My Country: Greece Line Voltage: 230VAC 50Hz I'm a: Knowledge Seeker Posts: 2,137	Re: the gutless, bloated, and fried power supply hall of shame lol It must be loud.