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Search: Posts Made By: Per Hansson
Forum: General Capacitor Questions & Issues 07-14-2019, 06:11 AM
Replies: 8
Views: 133
Posted By Per Hansson
Re: Help with capacitor substitution for a DVR

That is a great replacement capacitor you have found!
ESR matches well and the ripple current rating is almost 3 times better.
I must agree with stj though, very strange with ultra low ESR caps in...
Forum: General Electronics Technical Discussion 06-27-2019, 11:08 AM
Replies: 5
Views: 191
Posted By Per Hansson
Re: Help to identify SMD Zener diode

Posting this here also for future reference, it's from the datasheet.
The date code marking is B5 (May 2014) and this matches well with other components on the PCB.
The zener diode model marking is...
Forum: General Electronics Technical Discussion 06-26-2019, 10:27 AM
Replies: 5
Views: 191
Posted By Per Hansson
Re: Help to identify SMD Zener diode

Thanks, yes this is the same as I figured, it seems to match SOD-123 physically and that it infact is a Diodes Inc DDZ5V1B (5.1v Zenerdiode with 0.5w rating)
What threw me off was a Youtube video...
Forum: General Electronics Technical Discussion 06-25-2019, 01:02 PM
Replies: 5
Views: 191
Posted By Per Hansson
Help to identify SMD Zener diode

Hi, I have this Zener diode that is open.
I took pictures before desoldering it, I have attached them here.
Can anyone tell what Zener voltage this has from the markings?
I have an idea but don't...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-22-2019, 11:26 AM
Replies: 9
Views: 247
Posted By Per Hansson
Re: Fsp raider ra 750

From your tests it sounds like the PSU is not shorted.
It's still a good idea to use a dim light bulb tester.
It will light up the bulb if there is a short, limiting the current that goes to the...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-22-2019, 08:31 AM
Replies: 9
Views: 247
Posted By Per Hansson
Re: Fsp raider ra 750

I find many dead primary side caps when the PSU has APFC.
As mentioned be sure to check for shorts, commonly the PFC diodes will short when the main cap goes bad like this.
The easiest test is a...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-22-2019, 08:23 AM
Replies: 22
Views: 444
Posted By Per Hansson
Re: Enlight GPS-350CB-102 A

This is why both Y and X capacitors needs to be safety rated:
They are not allowed to have a failure mode that presents them as a short, only open...
A genuine Y capacitor will have a large number...
Forum: General Computer Discussion 05-19-2019, 02:17 PM
Replies: 3,806
Views: 619,570
Posted By Per Hansson
Re: best cheap/free scores 1.1

That drive supports PUIS, make sure it's not enabled:

http://wdc.custhelp.com/app/answers/detail/a_id/958

http://wdc.custhelp.com/app/answers/detail/a_id/5330

P.S: Board swaps almost never...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-18-2019, 02:43 AM
Replies: 13
Views: 267
Posted By Per Hansson
Re: Dell D550p Not Starting

Ticking can be due to a short.
Have you checked all secondary rails to make sure they are not shorted?
Ticking can also be due to bad startup caps, check the small caps on the primary side, or just...
Forum: General Electronics Technical Discussion 05-14-2019, 01:54 PM
Replies: 14
Views: 257
Posted By Per Hansson
Re: Test relays in circuit

Just use a bench supply and feed the relay coils the required voltage at very low current.
You should hear them click and you can ohm them out with a meter at the same time.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 05-14-2019, 12:42 PM
Replies: 31
Views: 757
Posted By Per Hansson
Re: Cordless Soldering Iron - recommendations?

It's all about how the heat is conducted to the tip, see eg EEVblog #1064 (https://www.youtube.com/watch?v=scvS2yeUH00)
I would not say it's as good but in a comparison to my 80w Weller WSP80...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-12-2019, 03:57 AM
Replies: 7
Views: 145
Posted By Per Hansson
Re: Gigabyte AB350-Gaming3

You may be able to get a loan CPU from AMD to perform the upgrade:

https://www.techspot.com/news/73334-amd-give-ryzen-apu-customers-free-processor-help.html
Forum: General Capacitor Questions & Issues 05-10-2019, 01:18 PM
Replies: 27
Views: 502
Posted By Per Hansson
Re: Where do you get your capacitors?!

Here you go: https://github.com/madires/Transistortester-Warehouse/tree/master/Documentation
Forum: Troubleshooting Power Supplies and Power Supply Design 05-10-2019, 01:13 PM
Replies: 21
Views: 352
Posted By Per Hansson
Re: Vizio M50-D1 power supply dual voltage?

I can't fathom a way in which it would not be universal input.
Because of the rating of the electrolytic capacitors at 450v you can be 100% sure it uses APFC boosting.
Because those capacitors are...
Forum: General Computer Discussion 05-10-2019, 12:42 PM
Replies: 3,806
Views: 619,570
Posted By Per Hansson
Forum: Equipment Usage, Soldering, Techniques, and Reviews 05-10-2019, 12:15 PM
Replies: 31
Views: 757
Posted By Per Hansson
Re: Cordless Soldering Iron - recommendations?

Missed this thread, you can't beat the TS80 for portability:
Uses USB-C Qualcomm quickcharge and usually you would have a charger for your phone or even better powerbank with you...
I have one in...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-03-2019, 03:41 AM
Replies: 17
Views: 410
Posted By Per Hansson
Re: Remove Lenovo black Glue under the chipset?

I'm sure there is a good way because some industrial repair houses do great work with such boards.
But I have not seen the solution to what they use publicly documented anywhere.
Forum: Troubleshooting Power Supplies and Power Supply Design 04-26-2019, 11:58 PM
Replies: 28
Views: 370
Posted By Per Hansson
Re: Funai Model LC220EM2 PS Issues

There is a subscribe button at the top...

https://www.badcaps.net/forum/attachment.php?attachmentid=194295&stc=1&d=1556344667
Forum: General Capacitor Questions & Issues 04-25-2019, 10:08 AM
Replies: 9
Views: 3,226
Posted By Per Hansson
Re: Wurth capacitors

Würth is a German brand, that does not mean that they manufacture their own capacitors...
Forum: All Others Motherboards 04-24-2019, 12:46 PM
Replies: 35
Views: 24,653
Posted By Per Hansson
Re: Siemens 840D PCU50 Industrial Computer

I have one however it will not help you.
The board needs to be reballed, I've had one done successfully by forum member Th3_uN1Qu3 (https://www.badcaps.net/forum/member.php?u=21626).
That said this...
Forum: General Computer Discussion 04-17-2019, 10:06 AM
Replies: 14
Views: 369
Posted By Per Hansson
Re: Проблемное включение компьютера

Du kan prova att använda en annan nätdel, det är inte helt ovanligt att detta problem uppstår p.g.a inkompabilitet mellan moderkort och nätdel.
Men det kan även bero på att komponenter antingen på...
Forum: General Capacitor Questions & Issues 04-17-2019, 10:01 AM
Replies: 2
Views: 166
Posted By Per Hansson
Re: Starcap battery-cap replacement?

It's called a supercapacitor or ultracapacitor.
Used instead of a battery for things like RTC and the likes.
They have quite poor lifetimes and often leak.
If the device does not require a good...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 04-15-2019, 07:14 AM
Replies: 17
Views: 410
Posted By Per Hansson
Re: Remove Lenovo black Glue under the chipset?

If you have free access to a milling machine it costs nothing.
If you don't, well then it costs allot of money...

https://www.eevblog.com/forum/repair/replacing-bga-by-milling-it-down/...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 04-15-2019, 05:51 AM
Replies: 17
Views: 410
Posted By Per Hansson
Re: Remove Lenovo black Glue under the chipset?

One way to do this job is with a milling machine, just mill the chip down completely untill only the balls remain.
Of course this is only viable on expensive mainboards since you will need to source...
Forum: Other Devices with Bad Capacitors 04-10-2019, 01:47 PM
Replies: 18
Views: 17,128
Posted By Per Hansson
Re: Mitsubishi Magna TR/TS / Verada KR/KS Engine & Transmission Controllers

Thank you very much for uploading the pictures!
And also for the information about the new url for postimg:
I have put in a replacement variable that changes all old .org url's into .cc so the old...
Showing results 1 to 25 of 500

 
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