Great info. "...the PCB phaseout" - - So that is what has caused them to not last as long. I was wondering why they did not last as long as these days.
Thank you...
cook
Quiet observer
Last Activity: 09-14-2024, 04:57 AM
Joined: 05-27-2010
Location: Central Florida
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Good brands of run capacitor for house heat hump
Are there good brands for 'run capacitors' or 'start capacitors' that are used on electric motors or heat pump compressors? ... r are the good capacitor brands for electronics (power supplies, laptops, motherboards, etc.) also the good brands for run capacitors?
Yeah I know this might be a novice question, but I just wanted to be sure. I did do a search on the forum but did not see this question asked before.
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This is great!!! Thank you truclacicr!!...Leave a comment:
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Thanks mon2. I will head in that direction with my searches....Leave a comment:
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Also..... Is the 'H' with the line above it and below it actually a logo? If so, what manufacturer uses it?Leave a comment:
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Help Identifying this chip - 324
See the attached drawing of the chip I am trying to identify. I think the last character (the 'H') may actually be the manufacturer logo, but I am not sure.
This chip is part of a hand held device that detects metal. Its called a pinpointer, and is used in the metal detecting community. The chip is located on the main power rail which is from a 9 volt battery, noted in the drawing.
I tried many searches to find the part, but did not see anything that looked close. But then I have very little experience doing this and I could have easily missed something obviou... -
Re: Decipher part of this please: 4.7U_0805_25V6K
A found a few charts listing the codes for temperature coefficient (tempco) for capacitors, but I'm not sure I understood what 6 actually stands for. It seemed that some of the coding standards had different meanings for a 6. Would someone have a link to an article or chart that would describe what 6 means in this situation?Leave a comment:
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Re: Decipher part of this please: 4.7U_0805_25V6K
Doing more searches on my question, I was able to finally find something that may make sense on this. A German site had my same question on it and they speculated that the 6K represented the minimum purchase quantity for the item. But I will continue to search on this and post any relevant findings.
One other thing.... In the schematic for this board, they have many capacitors with this label... 4.7U_0805_25V6K~D I thought the 'K~D' was very interesting to note!Leave a comment:
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Re: Decipher part of this please: 4.7U_0805_25V6K
In case it helps, the motherboard is a Compal LA-7781P - Dell Latitude E6430Leave a comment:
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Decipher part of this please: 4.7U_0805_25V6K
From a Dell laptop schematic, they list this SMD capacitor: 4.7U_0805_25V6K
I understand it all except the 6K at the end. What does that mean?
4.7U is capacitance
0805 is size of SMD capacitor
25V is 25 volts.
6K ???
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Purpose of this covering on a Dell laptop system board?
The Dell laptop pictured in this post has an area of the board covered with a dull silver material. It is the large 'square' area on the lower right that sits right next to the two card slots. When I removed it from my board, it felt like it was thick paper that has glue on one side, and the other side has a silvery material on it that crumbles off very easily. As it crumbles off it leaves a silvery color on your skin. Underneath of this cover, there are many chips, and there are two big chips from SMSC, which I assume are for the card slots. Other parts of the board are covered with a sheet... -
Dell E6430 (Compal LA-7781P) Boardview?
Requesting a boardview for Dell Latitide laptop E6430 containing a Compal mainboard model LA-77819P.
I have searched many places for this but can't find it. I found the schematic, but not a boardview.
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Re: Help with mosfet selection for TCL power supply
Thank you Dick-Barton.Leave a comment:
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Re: Help with mosfet selection for TCL power supply
Perhaps I have posted this in the wrong forum... Should I move this to the Power Supply forum? (And also add the model number to the title.)
ThanksLeave a comment:
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Help with mosfet selection for TCL power supply
I am working on a TCL 55s405. I am strictly a novice at electronic repairs.
I have a bad mosfet on the hot side of the power supply board. It is an ap50wn1k0h, and the specs. of it are below.
Will the aod9n50 mosfet be a good replacement for it? Its specs. are below too.
I selected this one because I could not easily find a 7 amp mosfet to replace the bad one, so I went with the next higher amp one I could find that seemed to be close.
Thank you so much.... -
Finding spare chips-What devices used this chip?
I am trying to figure what TV "Set Top Boxes" (STB) used the Broadcom "System On a Chip" (SOC) model 7231zbkfeba03g. I have a DVR that uses that chip, and I was hoping to find an inexpensive way to get some spares of the chip.
Officially, I think Broadcom said the end-of-life for the chip was late 2018 or 2019. But AliExpress says they have new ones in a 5 pack for about $60.00. I would love to find a spare or two for much less than that.
Is there an easy way to find out what devices used the Broadcom chip 7231zbkfeba03g? -
Re: Is this a sign of venting?
Yes, that makes sense. Something may have been wiped across them. I had not thought of that. I will replace them since they are easy to get to, and as noted, they won't cost much. ---- ThanksLeave a comment:
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Is this a sign of venting?
This board is for the controller on a house water heater.
In the center of the picture, notice the yellowish color in the vent grooves on the top of the capacitor. That color is not a reflection from the yellow wire near the capacitor. The color is actually in the groove. The same color is on the cap on the right side of the picture too, but it does not show up as well. I don't think I have ever seen something like this before...
Generally speaking, is that a sign of venting?... -
Re: APC BackUPS LS-500 Schematics?
Sorry Sam_sam_sam,
I don't know what was printed on the next line on the regulator. It is all back together now, and I can't see that part. And it is not easy to get it apart.Leave a comment:
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Re: APC BackUPS LS-500 Schematics?
I finally replaced all ten of the various aluminum radial electrolytic capacitors on the board. The only ones that seemed out of spec. were the smallest ones - 22uF 16V ones, which were blue and made by JiangHai. There are 6 of these on the board. Some of them had very high ESR values. I have been running it for a few days now with the new caps and it is no longer beeping. So I am thinking that they were the cause of the intermittent beeping I experienced. Thank you to everyone who helped me with this fix.Leave a comment:
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