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Re: APC BackUPS LS-500 Schematics?
if you see a regulator, change the caps surrounding it too.Comment
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Re: APC BackUPS LS-500 Schematics?
I would definitely recommend doing the ones right next to these chip but ones you get working correctly I would highly recommend that you recap the hole board
As far as the regulator ic chip you would have to look up each part to what kind a chip it isLast edited by sam_sam_sam; 07-05-2020, 05:47 PM.Comment
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Re: APC BackUPS LS-500 Schematics?
I found a regulator. It is a LM2575T. I will be tracing down the caps that are next to it.
It may be next week sometime before I have any results, but I will post what I find.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.Comment
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Re: APC BackUPS LS-500 Schematics?
good to hear that you had success!Comment
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Re: APC BackUPS LS-500 Schematics?
I am glad you got it back up and running
On this voltage regulator what was on the next line was it a 5 or was it 12 this tell you what what voltage is
Now if it not have anything then it adjustable typeLast edited by sam_sam_sam; 09-05-2020, 04:40 PM.Comment
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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.Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hello, I am looking for any and all files related to the mainboard for 820-2565-A (13" Macbook Pro A1278 mid 2012) schematics/board view.
I looked through forum search results and google and was unable to find a board view file, I found a pdf of all the schematics but I don't know where the parts physically are on the board as this is my first macbook board level repair attempt.
The macbook charger has a green light, the battery has been replaced and OS reports Normal status but Not charging. After cleaning a corroded capacitor it crumbled off the board. There... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
Gidday from Downunder,
Chasing the Schematics and also the board view for the HP Laptop board, model
according to the board markings that is read sideways against the the side frame to the graphics card or the DDR4 slot it says the following for the Model,
“MODEL:OPAK”
Then assuming the card was still inserted into the slot, releasing the card and removing it will reveal the full markings printed on the board (not the card),
“DAOPAKMB6FO REV:F”
Below in smaller print is a small logo of I think a backwards R with the letter U with the left stroke of the... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
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