Help with smd capacitor test

**bohaboha** · 09-04-2021, 06:41 PM

i try to test an smd capacitor out of circuit but get no reading how to do?

**petehall347** · 09-04-2021, 06:43 PM

i guess you found a bad one .. maybe try test a new one .

**bohaboha** · 09-04-2021, 07:05 PM

i did it with 11 other but it is same is all of them bad?

**DjKrish** · 09-04-2021, 08:53 PM

Quote:

Originally Posted by bohaboha

i did it with 11 other but it is same is all of them bad?

maybe its your meter? try another meter?

**stj** · 09-05-2021, 07:14 AM

tested with what?

**bohaboha** · 09-05-2021, 07:22 AM

Hi stj with multimeter in diode and ohms

**sam_sam_sam** · 09-05-2021, 08:27 AM

You really can not test capacitors correctly this way you at a minimum have capacitor checker at minimum but really need a ESR capacitor tester to do this correctly

**bohaboha** · 09-05-2021, 08:39 AM

you mean that it is not possible with multimeter or digital tweeser am talking about microscopic smd capacitors the ones on the tv screen boards

**sam_sam_sam** · 09-05-2021, 09:01 AM

No capacitor can not be tested correctly just using diode test or ohmmeter

With just a ohm meter or diode test will only tell you if is shorted but nothing else really

Now if you have a capacitor tester that shows you UF value that is better than nothing however it does not tell you if the capacitor is good or not for this you need a ESR capacitor tester for this

This is the ESR capacitor tester that I use

https://www.ebay.com/itm/18423015559...QaAnBZEALw_wcB

**bohaboha** · 09-05-2021, 09:33 AM

Thank you for the answer your tools is for proffs

**sam_sam_sam** · 09-05-2021, 09:39 AM

Quote:

Originally Posted by bohaboha

Thank you for the answer your tools is for proffs

There other versions of this ESR that cost less however the quality with some of them is questionable

**stj** · 09-05-2021, 09:41 AM

our tools cost about the same as a couple of beers in sweden after taxes!

**Per Hansson** · 09-05-2021, 10:53 AM

You don't need to use that, the cheap "transistor tester" that has been discussed here and elsewhere works just fine and can be had for the same price as the cheapest beer you can find in Systembolaget.

**bohaboha** · 09-05-2021, 12:22 PM

oh stj,sam_sam_sam and Per Hanson thank you i have that cheap an will test and se.
tack Per Hanson glömde bort den den ligger nånstans jag skall söka

**stj** · 09-05-2021, 12:26 PM

beer must have increased in price over the last few years - or the taxes increased!!

**Per Hansson** · 09-05-2021, 12:35 PM

Oops, the quick glance on eBay fooled me: the prices where for empty cases etc.
So make it 10 beers then

**bohaboha** · 09-05-2021, 12:40 PM

beer are not that expensive as it was even taxes Per Hansson can tell
no not 10 beers Per just around 4 or 5

**bohaboha** · 09-05-2021, 01:52 PM

ok i di some test and i get :28pF from both end of the capacitor and it does not show any esr so i can not know if it is good or not. the result is the same on all 12 capacitors

09-04-2021, 06:41 PM	#1
bohaboha Badcaps Veteran Join Date: Nov 2012 City & State: stockholm My Country: sweden I'm a: Knowledge Seeker Posts: 205	Help with smd capacitor test i try to test an smd capacitor out of circuit but get no reading how to do?

09-04-2021, 06:43 PM	#2
petehall347 Badcaps Veteran Join Date: Jan 2015 City & State: worcester My Country: United Kingdom I'm a: Knowledge Seeker Posts: 2,986	Re: Help with smd capacitor test i guess you found a bad one .. maybe try test a new one .

09-04-2021, 07:05 PM	#3
bohaboha Badcaps Veteran Join Date: Nov 2012 City & State: stockholm My Country: sweden I'm a: Knowledge Seeker Posts: 205	Re: Help with smd capacitor test i did it with 11 other but it is same is all of them bad?

09-05-2021, 07:14 AM	#5
stj Great Sage 齊天大聖 Join Date: Dec 2009 City & State: Europe My Country: some shithole run by Israeli agents I'm a: Professional Tech Posts: 25,389	Re: Help with smd capacitor test tested with what?

09-05-2021, 07:22 AM	#6
bohaboha Badcaps Veteran Join Date: Nov 2012 City & State: stockholm My Country: sweden I'm a: Knowledge Seeker Posts: 205	Re: Help with smd capacitor test Hi stj with multimeter in diode and ohms

09-05-2021, 08:27 AM	#7
sam_sam_sam Badcaps Veteran Join Date: Jul 2011 City & State: Some times Sunny Jacksonville FL My Country: USA Line Voltage: 120 Volts 60 HZ I'm a: Knowledge Seeker Posts: 2,956	Re: Help with smd capacitor test You really can not test capacitors correctly this way you at a minimum have capacitor checker at minimum but really need a ESR capacitor tester to do this correctly __________________ 9 PC LCD Monitor 6 LCD Flat Screen TV 30 Desk Top Switching Power Supply 10 Battery Charger Switching Power Supply for Power Tool 6 18v Lithium Battery Power Boards for Tool Battery Packs 1 XBox 360 Switching Power Supply and M Board 25 Servo Drives 220/460 3 Phase 6 De-soldering Station Switching Power Supply 1 Power Supply 1 Dell Mother Board 15 Computer Power Supply 1 HP Printer Supply & Control Board * lighting finished it * These two repairs where found with a ESR meter...> Temp at 50F then at 90F the ESR reading more than 10% 1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later ) 2 Hem Saw Computer Stack Board All of these had CAPs POOF All of the mosfet that are taken out by bad caps

09-05-2021, 08:39 AM	#8
bohaboha Badcaps Veteran Join Date: Nov 2012 City & State: stockholm My Country: sweden I'm a: Knowledge Seeker Posts: 205	Re: Help with smd capacitor test you mean that it is not possible with multimeter or digital tweeser am talking about microscopic smd capacitors the ones on the tv screen boards

09-05-2021, 09:01 AM	#9
sam_sam_sam Badcaps Veteran Join Date: Jul 2011 City & State: Some times Sunny Jacksonville FL My Country: USA Line Voltage: 120 Volts 60 HZ I'm a: Knowledge Seeker Posts: 2,956	Re: Help with smd capacitor test No capacitor can not be tested correctly just using diode test or ohmmeter With just a ohm meter or diode test will only tell you if is shorted but nothing else really Now if you have a capacitor tester that shows you UF value that is better than nothing however it does not tell you if the capacitor is good or not for this you need a ESR capacitor tester for this This is the ESR capacitor tester that I use https://www.ebay.com/itm/18423015559...QaAnBZEALw_wcB Last edited by sam_sam_sam; 09-05-2021 at 09:09 AM..

09-05-2021, 09:33 AM	#10
bohaboha Badcaps Veteran Join Date: Nov 2012 City & State: stockholm My Country: sweden I'm a: Knowledge Seeker Posts: 205	Re: Help with smd capacitor test Thank you for the answer your tools is for proffs

09-05-2021, 09:41 AM	#12
stj Great Sage 齊天大聖 Join Date: Dec 2009 City & State: Europe My Country: some shithole run by Israeli agents I'm a: Professional Tech Posts: 25,389	Re: Help with smd capacitor test our tools cost about the same as a couple of beers in sweden after taxes!

09-05-2021, 10:53 AM	#13
Per Hansson Super Moderator Join Date: Jul 2005 City & State: ---- My Country: Sweden Line Voltage: 230v 50Hz I'm a: Knowledge Seeker Posts: 4,842	Re: Help with smd capacitor test You don't need to use that, the cheap "transistor tester" that has been discussed here and elsewhere works just fine and can be had for the same price as the cheapest beer you can find in Systembolaget. __________________ "The one who says it cannot be done should never interrupt the one who is doing it."

09-05-2021, 12:22 PM	#14
bohaboha Badcaps Veteran Join Date: Nov 2012 City & State: stockholm My Country: sweden I'm a: Knowledge Seeker Posts: 205	Re: Help with smd capacitor test oh stj,sam_sam_sam and Per Hanson thank you i have that cheap an will test and se. tack Per Hanson glömde bort den den ligger nånstans jag skall söka

09-05-2021, 12:26 PM	#15
stj Great Sage 齊天大聖 Join Date: Dec 2009 City & State: Europe My Country: some shithole run by Israeli agents I'm a: Professional Tech Posts: 25,389	Re: Help with smd capacitor test beer must have increased in price over the last few years - or the taxes increased!!

09-05-2021, 12:35 PM	#16
Per Hansson Super Moderator Join Date: Jul 2005 City & State: ---- My Country: Sweden Line Voltage: 230v 50Hz I'm a: Knowledge Seeker Posts: 4,842	Re: Help with smd capacitor test Oops, the quick glance on eBay fooled me: the prices where for empty cases etc. So make it 10 beers then

09-05-2021, 12:40 PM	#17
bohaboha Badcaps Veteran Join Date: Nov 2012 City & State: stockholm My Country: sweden I'm a: Knowledge Seeker Posts: 205	Re: Help with smd capacitor test beer are not that expensive as it was even taxes Per Hansson can tell no not 10 beers Per just around 4 or 5

09-05-2021, 01:52 PM	#18
bohaboha Badcaps Veteran Join Date: Nov 2012 City & State: stockholm My Country: sweden I'm a: Knowledge Seeker Posts: 205	Re: Help with smd capacitor test ok i di some test and i get :28pF from both end of the capacitor and it does not show any esr so i can not know if it is good or not. the result is the same on all 12 capacitors

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