Re: Interpretation of capacitor ohms reading
Okay, thanks!
UPDATE: I metered the cap in question using the x10 setting and got different (better?) redults. With leads matched to cap polarity, i got 9 ohms (0.9 x 10) followed by a deflection to 11 ohms (1.1 x 10). Reversing polarity yielded a steady 2 ohms (0.2 x 10). Is this good? I will still test diodes and transistors now that i know how to do it....
DuderMcMerican
Member
Last Activity: 04-08-2016, 08:45 AM
Joined: 03-30-2016
Location: Woodbridge VA
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Re: Interpretation of capacitor ohms reading
I checked the transistors and they aren't actually leaning against other components. I think they just look that way because of the picture angle.
What's the best way to systematically test diodes/tramsistors for shorts?...Leave a comment:
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Re: Interpretation of capacitor ohms reading
Okay. Thanks for all the info! I'll double check with the lower ohm settings.
Should i systematically go around board and pull a leg from diodes/transistors to test for shorts? Kinda like what i did for the cap?...Leave a comment:
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Re: Interpretation of capacitor ohms reading
Oops.. Thanks for noticing that. I'll take care of that and retest when I get home today....Leave a comment:
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Re: Interpretation of capacitor ohms reading
Ohh okay. I'll do that, but i don't quite understand the logic.. The short was there with cap in place, the cap tested fine with one leg pulled, and the short was still there when i reinstalled cap leg.. Wouldn't that already indicate the short isn't in the cap? I'm just tryin to understand why pullin the cap and ohming the pads would provide new info.
Oh yeah.. I knew the x1k meant x1000. My mistake reporting the 1and 2 ohms..
I'm having trouble understanding the logic behind reducing...Last edited by DuderMcMerican; 04-01-2016, 12:34 PM.Leave a comment:
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Re: Interpretation of capacitor ohms reading
So i ohm'd my diodes and got mixed readings. Some read 0 ohm one direction and max ohms the opposite direction, some read 0 one direction and 1-2ohms the opposite, and some read 0 ohms both directions (and i think one read 1 ohm one direction and 2 ohms the other. I'm guessing that the "no deflection" diodes--0 ohms in both directions--indicate they're in the shorted circuit? Those were the yellowish ones in the vicinity of the cap in question.
In case it matters, I used the x1k setting on my analog meter. The...Leave a comment:
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Re: Interpretation of capacitor ohms reading
Okay. Will do. Here are pics of the board and cap in question. The one solder joint is still a little assed up from when i pulled the leg out....Leave a comment:
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Re: Interpretation of capacitor ohms reading
Hmm.. Haven't tried but good idea. Just to be clear (I'm a newb) do you mean ohm across the pads where the cap legs go? If I recall, there are no visible traces connected to those pads so I don't think following traces and ohming them would be an option.....Leave a comment:
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Re: Interpretation of capacitor ohms reading
It's similar but not my exact one. I'll take pics tonight and post...Leave a comment:
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Re: Interpretation of capacitor ohms reading
It's from the EEC IV on a 1990 Mustang. No, I don't have pics right now, but I can take some. What would you want the pics to show?Leave a comment:
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Interpretation of capacitor ohms reading
I recently replaced a few capacitors in my PCB, and I jumpered a burnt trace.
The jumper works nicely, but one concern I have is that one of the 47uf caps is showing 0 resistance on analog multimeter. My understanding is that on-board cap tests with multimeter are all but useless EXCEPT when cap reads 0 ohms (needle pegs and doesn't regress back) or infinite resistance (needle does nuttin). In my case--0 ohms--the online says it's a shorted (bad) cap. Well, i pulled one leg out of the board and tested resistance again, and the meter read exactly how it should (needle pops to no... -
Re: New Members - please post your introductions here
Welp, it appears that I still cannot post a thread in the General Capacitor Questions & Issues forum because I'm a newb, so here goes...
I replaced a few capacitors in my PCB, and I jumpered a burnt trace.
The jumper works nicely, but one concern I have is that one of the 47uf caps is showing 0 resistance on analog multimeter. My understanding is that on-board cap tests with multimeter are all but useless EXCEPT when cap reads 0 ohms (needle pegs and doesn't regress back) or infinite resistance...Leave a comment:
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Re: New Members - please post your introductions here
Welp, it appears that I still cannot post a thread in the General Capacitor Questions & Issues forum because I'm a newb, so here goes...
I replaced a few capacitors in my PCB, and I jumpered a burnt trace.
The jumper works nicely, but one concern I have is that one of the 47uf caps is showing 0 resistance on analog multimeter. My understanding is that on-board cap tests with multimeter are all but useless EXCEPT when cap reads 0 ohms (needle pegs and doesn't regress back) or infinite resistance...Leave a comment:
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Re: New Members - please post your introductions here
Hey everyone. DuderMcMerican here. Long time reader, first-time poster. Just want to say thanks for all of your help!Leave a comment:
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