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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I know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.
For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).
https://www.badcaps.net/filedata/fetch?id=3591771
https://www.badcaps.net/filedata/fetch?id=3591772
It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:
https://www.badcaps.net/filedata/fetch?id=359177... -
Hello,
First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.
I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.
I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
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Hello!
I have two projects on my work bench. One is a friends dead JBL Xtreme speaker with a blown voltage regulator and corresponding bulged and shorted cap. That cap has clear markings so I know what replacement I need for it.
The other project however is a whole different deal. It's a Zoom 9000 guitar effect from the 90th that has developed a devil hound howl when there is no input from the guitar. I'm guessing caps problem. So, since I don't really use this effect anymore I thought it would be a perfect project to learn on.
I have studied the board and... -
I'm trying to repair two old VCRs, they both have bad caps. One has leaky ones, the other would barely run until I subbed in some caps from another power supply I had laying around (though they are the wrong values). This vcr works for an hour or two, but then the power supply starts whining and the picture gets lines in it. I didn't replace all the secondary caps, so another voltage might still be problematic, or the values I used are too far off.
I've been on mouser and digikey but the options are a bit overwhelming. I just need some new ones that will work. They don't need to be top quality,... -
Good evening
I recently aquired a rev 1.1 Gigabyte 60XT, and was suprised of the amount of leaking caps for a motherboard of the P3 era. Especially the way the 330µf caps seems like the housing discolored even.
Now, there are some 3300µF 6.3V KZG series around the CPU. Would it be OK to replace them with something like EEUFR1A332 ? (Panasonic FR 3300µF 10V). Or was this board designed around very low ESR caps?
But I was also suprised about the bigger boys, which are 330µF 25V.
Could it be they used 25V caps because they were cheaper / available at that time?...
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