The LX/84A/84B Series ICs are positive regulators designed to provide 5A Linfinity Microelectronics Division Western Avenue, Garden Grove, CA. linfinity lx datasheet, cross reference, circuit and application notes in pdf format. LXCDD datasheet, LXCDD circuit, LXCDD data sheet: MICROSEMI – 5A LOW DROPOUT POSITIVE REGULATORS,alldatasheet.
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When I got this motherboard it had some bulged capacitors but worked. One day, after some intensive CPU testing, it died peacefully. Since I enjoy learning about electronics and repairing things, I decided to recap it. Got a 60W soldering iron and a few other things and I took note of the position and values of the capacitors on the motherboard: I guess I didn’t see clearly before desoldering. Now I wonder where this 4.
My best guess based on some not-so-clear pictures I took before desoldering is that lihfinity 4.
Can somebody with this motherboard please confirm this? So if this is right, the ox8384 count of the aluminum electrolytic capacitors is: So maybe this means lx8834 LXA linrinity bad too? If the voltage regulator is bad, what replacement should I buy? What are the alternatives? I tried to understand the datasheet, I noticed this isn’t a fixed voltage regulator and it needs a capacitor. But honestly I couldn’t understand much.
Thank you for sharing your knowledge. Originally Posted by rattlesnake. But after desoldering all caps, I noticed I made a mistake, as one of the 3 smaller capacitors is 4. I have another issue, this one apparently is the definitive issue.
Last edited by momaka; at Thanks for the swift reply momaka! This is all the written data from the previous capacitors and their measurements: So far I bought these ones for replacement: I already bought these for replacement: Are they useful for this project or I should save them for a different project and buy different ones?
In that case, lihfinity should I look for, uF or uF like momaka said? About the smaller caps I removed, these are the values I measured: These ones seem to have a higher ESR. Thank you very much for all your help and guidance momaka. I really appreciate it a lot! I’ll also keep looking for better capacitors, maybe another option is desoldering the caps from broken motherboards?
I lihfinity also reading lx8348 capacitors: What are they for? Stabilizing the current or is it voltage? Do you have any reading material that you can recommend me? Maybe something with useful examples I can try and have fun. If I desolder these, and test them, and they are fine, should I use them? But I’ll be short of 5, and now another question for a change: Is it a wise idea to mix brands and values?
How can one tell? Last edited by rattlesnake; at No problems, you’re welcome. Originally Posted by momaka. Only these are the good Japanese capacitor brands worth using: Last edited linfinitu Wester; at Gentlemen, it doesn’t boot. I get nothing, it’s exactly like before. At least the CPU fan is spinning, but that’s it.
I was extremely careful in my work, I cleaned oinfinity the caps with solder wick, re-measured them, I cleaned all the holes, the legs of the used capacitors, re-measured them, soldered, cleaned the flux, I was very linfunity, delicate, I was a craftsman. Yet it failed silently.
What is the next step? What is worth doing to fix this motherboard or at least to finish the diagnose? Thank you for the resources and all the data about capacitors. I’ll save it and consider it a bible.
MICROSEMI LX8384-00CP TO-220 5A LOW DROPOUT POSITIVE REGULATORS
I’ll see if I can get a good deal getting discarded motherboards. I found a guy that sells used working P4 or Socket motherboards for a good price. Originally Posted by Wester Minus the quaternary salt electrolyte capacitors. My assumption from this description is you tested the motherboard with all the caps installed, correct? Because if you test the motherboard without any capacitors installed, that can cause damage.
Just making sure I point this out. Anyways, with the capacitors replaced, now it’s time to check all the regulators on the board, especially that overheated one the LXAcp. Report back what results you get here. Depends on how much you value your time and the motherboard. If you linfinit have the time and you enjoy doing this, then you might as well attempt everything reasonable to troubleshoot it.
LXCP – LINFINITY – PMIC – Voltage Regulators – Special Purpose – Kynix Semiconductor
Speaking of which, have you tried resetting the CMOS? I see this motherboard has dual BIOS. Have you tried booting from the second BIOS? Maybe they are the culprit? How can we check them? I think this is the datasheetright? Is it strange that the name on these doesn’t include “2S”? Regarding the linear regulators: Well, the one near the RAM slots appears to have an output that is a bit high at 3. So it does make me wonder a bit if there is something wrong with it though I highly doubt it.
But when I come back, I’ll look into your motherboard again. So please be patient if you don’t see a response from me for a few days. I look forward for more responses with things to do to troubleshoot this motherboard! Have a good trip. I’m using the motherboard on a table, there’s no computer case. Furthermore, I think that there is no third pin in this electrical installation, that is to say, no ground if there is something, I think it doesn’t go all the way to the ground in a proper way.
Anyway, I used the PSU case and it worked! Let’s go for it. I really enjoy this process as I’m learning a lot and it’s quite fun!
But it was disappointing not to see any changes after the whole recapping business. Changing the bus speed to 66 MHz didn’t help. The POST card isn’t showing anything, it just powers on but the display is fixed at “”. As if there was no CPU. I don’t think the BIOS is compromised, but you never know, it could be!
LX8384-00CDD PDF Datasheet浏览和下载
All times are GMT The time now is Buenos Aires My Country: Find More Posts by rattlesnake. Originally Posted by rattlesnake But after desoldering all caps, I noticed I made a mistake, as one of the 3 smaller capacitors is 4. Originally Lnifinity by rattlesnake I have another issue, this one apparently is the definitive issue.
Find More Posts by momaka.
Originally Posted by rattlesnake This is all the written data from the previous capacitors and their measurements: Originally Posted by rattlesnake So far I bought these ones for replacement: Originally Posted by rattlesnake About the smaller caps I removed, these are the values I measured: Originally Posted by rattlesnake maybe another option is desoldering the caps from broken motherboards?