Hi all, I was able to get some great help on the forums about a month ago. Just looking for a little more, as I am currently stumped and having trouble locating information. It was on the LG MU-42PM11 tv and I got replacement 33uF/25v caps for the Ysus/Zsus boards. I have 2 locations on the Ysus board that are reading incorrectly. If the caps are tested off of the board they read within range of 33uF, if they are placed in these specific locations I am reading 500uF on one, and 120uF on the other. No matter which Ysus board, as I have quite a few that I am working with. Don't understand this concept. Everything is discharged and boards are out of TV and have been for months.
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Re: Caps reading over uF
This is correct and you are reading total capacitance value of capacitors in parallel on that certain circuits. Most important is ESR and you do not have the tool. Buy the ESR meter for other capacitors to check.
Cheers, Wizard -
Re: Caps reading over uF
Much appreciated Wizard! I was looking at some kits and the Blue ESR meter looks like a good choice, unless.. I.. should.. get the.. Capacitor "Wizard".....Comment
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Re: Caps reading over uF
for most people, inexpensive ESR meter that is easy to put together gets the vote. Blue ESR meter meet the bill IIRC.
Cheers, WizardComment
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Re: Caps reading over uF
Many thanks, just ordered...Comment
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Re: Caps reading over uF
Also keep in mind, with many capacitors in parallel, the ESR lowers. (better). That confounds your checks. Which means pulling suspect capacitors and check. Some items easily by unplugging the power wiring plugs first to remove extra capacitors out of circuit.
Don't be fooled by a shorted diode on power circuits especially power supply or switching regulators, some have a diode, some do not. (Shorted diode or shorted transistor causes ESR to see low ESR as well.) That is where multimeter is put in use to confirm that not fooling you.
Cheers, WizardComment
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