So this morning I thought it would be a good idea to hit the PFC area with the hot air gun to see if I can get it to power on again... and *boom* something blew and the power went out in the whole house. I think it was the thermistor. Now the question is: was it the thermistor all along or did I create a new fault?
I've got my money on the thermistor being the culprit because I did not apply a lot of heat so it should not have blown up the way it did.
W1ngl3t
Member
Last Activity: 03-17-2025, 08:57 AM
Joined: 02-21-2022
Location: Budapest
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Corsair RM850x (synchronous ATX) need help troubleshooting
Hi all,
I have a Corsair RM850x that refuses to turn on. I have 5v stby but as soon as I try to power it up it goes 'click' and does not deliver any voltages.
I have not been able to find any blown or shorted components and there are no bulging capacitors. I have replaced the APFC controller and for a brief period (2 or 3 on/off cycles) the PSU worked but then the fault returned. Perhaps heating the PFC area is what resulted in the temporary fix?
The only option I see now is to start pulling components one by one, but before I proceed, perhaps someone more knowledgeable... -
Resolved
Please disregardLeave a comment:
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Need help detecting/reading MX77U25650FZ4I42
Hi all, I have a CH341a and have attempted to read MX77U25650FZ4I42 (Macronix) using the MX25U25635F preset in NeoProgrammer (as suggested here on BadCaps) but it's not working. Does anyone have any suggestions as to what I should try.
Many thanks -
Corsair RM850x Synchronous ATX PSU - need help diagnosing
Hi all,
I have a relatively new (from 2018) Corsair RM850x PSU that refuses to turn on.
The 5v standby rail is working fine, but when I try to turn it on it shuts itself off in a few milliseconds.
There are no obvious shorts to be found and this is what I can see with my oscilloscope:
- 3.3v and 5v hold their intended voltages fine for a few millisecond
- the 12v rail goes to 12v on startup and then goes into decline
- when the 3.3v and 5v rails are switched off the 12v rail momentarily increases a bit (probably perfectly normal)
- as per... -
ZMI usb-c power adapter - wrong mosfet?
Hi all,
The pictured ZMI ac-dc power adapter stopped working a little while ago. Using my multimeter I could see that there was DC voltage being produced, but it cycling between 0v and 1v.
I suspected it was the TK11A65D ([URL="https://toshiba.semicon-storage.com/info/TK11A65D_datasheet_en_20131225.pdf?did=6810&prodName=TK11A65D"]datasheet[/URL]) mosfet acting up and ordered a similar TK15A50D ([URL="https://toshiba.semicon-storage.com/info/TK15A50D_datasheet_en_20131101.pdf?did=12219&prodName=TK15A50D"]datasheet[/URL])
I've now... -
Re: Plz help ID this component from Bose QC35 headphones
For ppl stumbling upon this, I've removed the component and it has 36 pins so definitely not the eup7201 LDOLeave a comment:
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Re: Plz help ID this component from Bose QC35 headphones
Looks like I need to start ordering physical books...
Do you think the Torex XC6415 would be a good replacement?
[url]https://cdn.badcaps-static.com/pdfs/370efcd2986c782e2de2daa9fee8b37c.pdf[/url]Re: Plz help ID this component from ...b37c.pdf[/url]Leave a comment:
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Re: Plz help ID this component from Bose QC35 headphones
Much appreciated jiroy!
How did you find it, if you don't mind me asking?Leave a comment:
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Plz help ID this component from Bose QC35 headphones
Hi all,
The IC on the pic is sits on the pcb of a Bose Quietcomfort 35 ii and it seems to connect to the right speaker driver. I have been unable to identify it from the markings, which is a problem as I suspect it needs to be replaced.
I've seen another one of these IC's from a different QC35 and the top three digits were different (it's '848' on this one and '582' on the other one), which leaves us with only 'NP' being common.
Any help would be appreciated!
Thanks
[ATTACH]288063[/ATTACH]... -
Re: New Members - please post your introductions here
Hey everyone, my name is Balint and I've taken an interest in tinkering (wouldn't call it repairing yet) w/ electronics. I have a degree in Finance, so I'm probably missing a lot of the basics, but fortunately there are a lot of great youtube channels catering to those with great ambitions.
If I could, I probably would leave finance to repair electronics for a living.
Nice to meet all of you!Leave a comment:
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