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Search: Posts Made By: ben7
Forum: Troubleshooting Power Supplies and Power Supply Design 02-14-2021, 07:37 AM
Replies: 1,689
Views: 411,333
Posted By ben7
Another Supernight

Another day, another Supernight!

This one is also popped - blown fuse, shorted primary FET, and blown caps (see below). The case was slightly melted, but I didn't bother photographing it as it's...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-05-2021, 09:18 PM
Replies: 1,689
Views: 411,333
Posted By ben7
Re: the gutless, bloated, and fried power supply hall of shame

Thank you for the warm salutations, momaka and goodpsusearch. :)


It uses a real Y1 type capacitor, according to the cap itself. It's only 2.2nF, which may explain the small-ish physical size....
Forum: Troubleshooting Power Supplies and Power Supply Design 01-17-2021, 09:44 PM
Replies: 1,689
Views: 411,333
Posted By ben7
Re: the gutless, bloated, and fried power supply hall of shame

When will it end?!... When your business burns down, in fact. :goofy:

I was told that the fire department was called out for this one, as the employees heard a "strange noise" and smelled...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-16-2021, 08:26 PM
Replies: 1,689
Views: 411,333
Posted By ben7
Re: the gutless, bloated, and fried power supply hall of shame

Yet another faulty 12V 5A PSU ... this one has some absolutely filthy solder!

"AC/DC ADAPTOR"
"TS5-6W"

100-240V 50/60Hz 1.8A
12V 5A

Rectifier: 4x 1N5408
Controller: OB2269CP
Forum: Troubleshooting Power Supplies and Power Supply Design 01-16-2021, 04:10 PM
Replies: 1,689
Views: 411,333
Posted By ben7
Re: the gutless, bloated, and fried power supply hall of shame

This one is not the worst out there, but it's pretty darn shameful I'd say!
(Will give you a "super-night" when it burns your house down!)

"Supernight"
"AC/DC ADAPTER"
"W-T5000"

Input...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-16-2021, 03:23 PM
Replies: 1,689
Views: 411,333
Posted By ben7
Re: the gutless, bloated, and fried power supply hall of shame

Channel Well Technology
KPL-060F

100-240V 50/60Hz 1.7A
12V 5A

Rectifier: ??? (Hidden, didn't bother to unsolder heatsink, but looks like same package as KBL40x types)
Controller: "MWP 36R...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-16-2021, 02:16 PM
Replies: 1,689
Views: 411,333
Posted By ben7
Re: the gutless, bloated, and fried power supply hall of shame

This PSU is not that bad, however, it came with a fatal factory defect ...

"AC ADAPTER"
"TS5-6W"
"Trained Service Personal Only."

100-240VAC 50/60Hz 0.8A
12V 5A

Rectifier: GBU808P
Forum: General Capacitor Questions & Issues 07-03-2019, 07:51 PM
Replies: 988
Views: 473,676
Posted By ben7
Re: The Hall of Shame - Badcaps Photo Montage

Take a look at how wide open the vent is. I'd say it suffered a sudden, violent failure.
That's not the first time I've heard of big filter caps going in a NAD amp..


Look closely at the big...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-10-2018, 07:32 AM
Replies: 1,689
Views: 411,333
Posted By ben7
Re: the gutless, bloated, and fried power supply hall of shame

Is it just me, or has that "2003" control IC gone poof? :)

-Ben

P.S. Looks like you struck gold ... er, brown, crispy gold. :tongue:
Those cheapo PSUs are probably good for 200W max, and even...
Forum: Troubleshooting Audio Equipment 01-05-2018, 08:14 PM
Replies: 48
Views: 4,254
Posted By ben7
Re: Pioneer Speaker Package subwoofer transformer.

Something like this may work. Dual primary (117/234V), 48V @ 4A output, center-tapped (so it's 24V-0-24V)....
Forum: Troubleshooting Audio Equipment 01-05-2018, 07:40 PM
Replies: 13
Views: 2,123
Posted By ben7
Re: Onkyo tx sr 607 -New DSP chip installed

SRT1, are there any other BGA chips on your board?

To me, seeing that it works after a few hours of idle time makes me think that there is a thermal issue, like a bad solder connection which...
Forum: General Electronics Technical Discussion 01-05-2018, 07:28 PM
Replies: 1
Views: 893
Posted By ben7
Green LEOTEK LED traffic light insert! [Teardown/pics]

My father found a green LED traffic light insert thing in the intersection in front of his workplace. The lights at the intersection were all there, so it must have fallen off of a truck or work...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-05-2018, 06:37 PM
Replies: 6
Views: 2,319
Posted By ben7
Re: ANTMINER S9 power circuit

Might very difficult if not impossible to fix due to the PIC chip. It might be read protected, or completely fried, etc..
Forum: General Electronics Technical Discussion 01-05-2018, 06:08 PM
Replies: 25
Views: 1,978
Posted By ben7
Re: Overvoltage protection design ideas

The simplest thing I can see doing is to connect a suitably sized power transformer across the AC input before the UPS transformer, and connect the output of the power transformer in series,...
Forum: General Electronics Technical Discussion 01-05-2018, 05:38 PM
Replies: 17
Views: 1,906
Posted By ben7
Re: Transformer in UPS runs warm for no apparent reason

That sounds normal to me. It's normal for a transformer to be warm even when unloaded, due to the "eddy current" losses in the iron core.

This is why environmentalists don't like iron-core...
Forum: General Capacitor Questions & Issues 12-15-2017, 06:21 PM
Replies: 6
Views: 1,559
Posted By ben7
Re: Good motor capacitors for an MOT?

Just get a 10kVA or similar size distribution transformer (or two!). Much easier, plus those can handle a larger amount of power. MOTs will overheat easily if you don't ballast them.

Also keep in...
Forum: General Capacitor Questions & Issues 12-15-2017, 06:04 PM
Replies: 8
Views: 1,450
Posted By ben7
Re: Bad NCC SMQ 220/400 in 2006 Seasonic S12II

It's possible that the capacitor failure caused the diode to fail due to excessive ripple current or something like that.

I haven't seen it myself yet, but I've heard of rare occasions where the...
Forum: Troubleshooting Power Supplies and Power Supply Design 09-03-2017, 11:40 PM
Replies: 1,689
Views: 411,333
Posted By ben7
Re: the gutless, bloated, and fried power supply hall of shame

Coworker brought to me a Chicago Electric 2kW inverter (model 92464) that he picked up for $30. He wanted my opinion as to how well built it is ...

First off, note that it is a two-board design....
Forum: General Capacitor Questions & Issues 09-27-2016, 10:56 AM
Replies: 15
Views: 2,621
Posted By ben7
Re: ESR Mania

^^^ I second this, even though I don't have a proper ESR meter yet. I've gone looking around and found good/decent ones for a decent price.

Heck, if you repair lots of stuff, even spending $100 on...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-24-2016, 09:03 AM
Replies: 45
Views: 17,048
Posted By ben7
Re: DELL OEM H240AS-00 (HIPRO) ~ major blow up!

Well the more modern CapXon capacitors have been fine in devices like PSUs and such ... it was just those from the bad cap plague era that were a problem.

Then again, yes, I still don't fully...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-24-2016, 08:32 AM
Replies: 3,136
Views: 928,621
Posted By ben7
Re: Power supply build quality pictorial. part 2

Very nice power supply, Wester547!
:hump:

Cheers,
-Ben
Forum: Troubleshooting Power Supplies and Power Supply Design 02-24-2016, 08:24 AM
Replies: 45
Views: 17,048
Posted By ben7
Re: DELL OEM H240AS-00 (HIPRO) ~ major blow up!

Ahh, okay, thanks for the info! :D

I've since fixed the computer. Sorry for not giving an update until now...
I bought a replacement PSU. I actually opened that up (I know, tsk tsk tsk).
It is...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-14-2016, 08:34 AM
Replies: 1,044
Views: 137,210
Posted By ben7
Re: ESR meter upgrades

Ohhhhhhhhh...... :owned:
LOL XD

I see ... hmm ...
Welp, I could do without the fet and triac testing feature for the moment I guess.
I'll have to take a look at just how it measures those, to...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-13-2016, 10:37 PM
Replies: 1,044
Views: 137,210
Posted By ben7
Re: ESR meter upgrades

1. You can drive certain fets with 3.3V ... the FDV304P, a P-channel device, has a typical gate threshold voltage of 0.86V! Granted, it's not a power fet, but it can be used to switch other things on...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-13-2016, 07:49 PM
Replies: 1,044
Views: 137,210
Posted By ben7
Re: ESR meter upgrades

I'm thinking ... I have two different STM32 "nucleo" dev boards, I wonder if I can translate/port this code to one of those ... I'm becoming more and more interested in building one of these :p:...
Showing results 1 to 25 of 500

 
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