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Search: Posts Made By: Per Hansson
Forum: General Computer Discussion 03-16-2019, 05:29 PM
Replies: 3,617
Views: 596,253
Posted By Per Hansson
Re: best cheap/free scores 1.1

Please show us the "godlike" cap choices Antec made in that PSU ;)
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-13-2019, 01:21 PM
Replies: 3
Views: 110
Posted By Per Hansson
Re: Looking for recommendations IR BGA rework station

Maybe this thread can be useful: https://www.badcaps.net/forum/showthread.php?t=67478
Forum: General Capacitor Questions & Issues 03-11-2019, 02:34 PM
Replies: 5
Views: 113
Posted By Per Hansson
Re: Bad caps on an M-audio DSM2 power supply

Between the marks RB20 and RB14 on the PCB there is a resistor with a hole in it: might be worth investigating further ;)
Forum: General Electronics Technical Discussion 03-09-2019, 08:56 AM
Replies: 15
Views: 200
Posted By Per Hansson
Re: Boost PFC Converter

If the resistor is large enough you don't need the PTC: It's just for safety since Fluke needs a CAT rating on the equipment they sell...
Here is one example:...
Forum: Troubleshooting Power Supplies and Power Supply Design 03-09-2019, 01:30 AM
Replies: 3,012
Views: 733,054
Posted By Per Hansson
Re: Power supply build quality pictorial. part 2

It's pretty funny that they could not find a spot to solder the X capacitor to.
Considering it's actually glued ontop the main PCB maybe it would have fit there lol :D
Or on the input PCB mounted...
Forum: General Electronics Technical Discussion 03-09-2019, 01:09 AM
Replies: 15
Views: 200
Posted By Per Hansson
Re: Boost PFC Converter

If you read the post I linked (https://www.badcaps.net/forum/showpost.php?p=857856&postcount=86) in my previous post above I mentioned two things there.
The Fluke SV225 LoZ adapter is pretty nice,...
Forum: Troubleshooting Power Supplies and Power Supply Design 03-09-2019, 12:54 AM
Replies: 14
Views: 871
Posted By Per Hansson
Re: Recapping Tektronix 2235 PSU

Look again in the list, C956 is 330F 50v for the new cap on the 2235A scope.
As for the bulk capacitor just use your multimeter and check that you have zero ohm between the three negative posts....
Forum: General Electronics Technical Discussion 03-06-2019, 10:24 AM
Replies: 15
Views: 200
Posted By Per Hansson
Re: Boost PFC Converter

1: The higher the voltage the higher the stored charge in the bulk capacitor.
The ATX spec says you need 16ms holdup time, with a 1000F 400v capacitor charged to 325v you have 53 joules, however...
Forum: General Computer Discussion 03-06-2019, 10:05 AM
Replies: 3
Views: 94
Posted By Per Hansson
Re: Anyone have KB872952 for NT4?

Well what do you know, now that I'm at home I found a local copy of the file on my machines.
I really need to make it a priority to setup a 24/7 NAS that I can reach via my VPN haha :rock:
The...
Forum: Troubleshooting Power Supplies and Power Supply Design 03-05-2019, 10:35 AM
Replies: 17
Views: 249
Posted By Per Hansson
Re: Recapping Mean Well MWP-606

They do look odd, however doing a fake with such a nice bung and all would seem counter productive.
If you are really curious maybe e-mail Rubycon and see if they respond?
Forum: General Computer Discussion 03-05-2019, 09:34 AM
Replies: 3
Views: 94
Posted By Per Hansson
Re: Anyone have KB872952 for NT4?

The way it's been described is when you do a dual boot install: NT4 and Win2K.
Then Win2K upgrades the NTFS filesystem to it's version, that the NT4 version of CHKDSK does not understand.
I think...
Forum: General Electronics Technical Discussion 03-05-2019, 09:20 AM
Replies: 4
Views: 76
Posted By Per Hansson
Re: useless stuff?

It's a ferrite bead (EMI filter): https://en.wikipedia.org/wiki/Ferrite_bead
Forum: General Computer Discussion 03-05-2019, 09:08 AM
Replies: 3
Views: 94
Posted By Per Hansson
Anyone have CHKDSK hotfix KB872952 for Windows NT4?

Hi, does anyone have a copy of KB872952 saved?
I need it for Windows NT4, Microsoft has been so helpful as to remove all old KB articles and ask you to upgrade to Win10 instead :barf:
The file is...
Forum: General Electronics Technical Discussion 03-03-2019, 10:39 AM
Replies: 20
Views: 353
Posted By Per Hansson
Re: Microwave Issue

Well, it's a step up transformer with roughly a 1:10 ratio I would assume.
So 2.3kV output with 230v input.
So if you feed it 24vac on the primary you should see around 240vac on the secondary...
...
Forum: Troubleshooting Power Supplies and Power Supply Design 03-03-2019, 09:29 AM
Replies: 5
Views: 140
Posted By Per Hansson
Re: An old runner - Tagan EasyCon 480W (TG480-U15)

When testing the power supply you should use a dim bulb tester.
Search the forums here for it, bacially just put a incandescent 60w lightbulb in line with the PSU, or replace the fuse with it.
If...
Forum: Troubleshooting Game Consoles & Other Weird Devices 02-24-2019, 10:42 AM
Replies: 3
Views: 88
Posted By Per Hansson
Re: Industrial PC display

It could be a bad cable, I don't remember if I have posted about it but I made a LVDS breakout board for a Siemens industrial PC.
In my first test I did not use twisted pair cabling and then it...
Forum: Troubleshooting Computer Displays 02-24-2019, 03:46 AM
Replies: 18
Views: 389
Posted By Per Hansson
Re: Dell UltraSharp 2007Fp 2nd problem

Since the board is fed with 19v now you understand why the Zener failed, it tried to regulate that down to 3.6v or whatever it's rated for, obviously with a power rating of maybe 1/4w that did not...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-23-2019, 03:53 AM
Replies: 4
Views: 117
Posted By Per Hansson
Re: ZHAOXIN PS-3005D DC Power Supply Not working need HELP!!

This is a 30v max power supply.
You need to provide more details about the problem.
Example: when did it happen, what did you do etc etc.

P.S: These videos might have some useful troubleshooting...
Forum: Troubleshooting Computer Displays 02-23-2019, 03:38 AM
Replies: 18
Views: 389
Posted By Per Hansson
Re: Dell UltraSharp 2007Fp 2nd problem

If the circuit voltage is 3.3v the Zener should be a bit above that, in this circuit it probably acts as a safety device for over voltage spikes.
I would say a 3.6v Zener might be a sensible value...
Forum: MSI/Microstar 02-22-2019, 02:49 PM
Replies: 12
Views: 441
Posted By Per Hansson
Re: MSI 848P Neo-V recapping - suggestions and options?

Nice work!
Is it just some local place in Gothenburg without a website or something larger?
Forum: Troubleshooting Power Supplies and Power Supply Design 02-22-2019, 02:45 PM
Replies: 5
Views: 122
Posted By Per Hansson
Re: Help identifying power ic?

Well, it's because it's a link to a webpage, not an image...
I fixed the link now...
Forum: Troubleshooting Computer Displays 02-22-2019, 01:57 PM
Replies: 18
Views: 389
Posted By Per Hansson
Re: Dell UltraSharp 2007Fp 2nd problem

Check Zener diode ZD701, also check the Mosfets.
Forum: General Electronics Technical Discussion 02-22-2019, 01:49 PM
Replies: 1
Views: 60
Posted By Per Hansson
Re: List of HDTV's with on/off event timers

Panasonic plasmas usually have a mode you can set so it turns off after 3 hours unless you press the "ok" button when a message pops up for 3 minutes, to prevent burn-in...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-18-2019, 01:16 PM
Replies: 16
Views: 472
Posted By Per Hansson
Re: OCZ Fatality 700w PSU Repair Help

Member Behemot here has caps of the right type afaik.
As for the 16v cap that is easy: just measure to the 12v leads from where the caps are.
The 16v cap will have a low ohm path to 12v output...
...
Forum: Troubleshooting Computer Displays 02-18-2019, 01:07 PM
Replies: 18
Views: 389
Posted By Per Hansson
Re: Dell UltraSharp 2007Fp 2nd problem

Well you linked to an excellent thread on the matter.
Please check the diodes discussed there: FD3 and FD4
Showing results 1 to 25 of 500

 
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