Got some of the freeze spray in the post today. Just wondering if it can be used to cool a live circuit and see if it fixes a fault?
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Re: Can you use freeze spray on a live circuit?
I would be careful in case it contains conductive material. I've used it on logic level circuits with no problem, and on live circuits after allowing it to evaporate for a couple of seconds.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: Can you use freeze spray on a live circuit?
I have used it on live circuits but be careful if you spray too much the frost will melt instead of sublimate and can cause a short."...off the record, unnamed government sources
alluded to unsubstantiated innuendos about
alleged indiscretions and insinuated that they
are rumored not to be without basis for further
speculation..."Comment
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Re: Can you use freeze spray on a live circuit?
It should not be used on a part of a circuit which has a therministor attached to it e.g. heatsinks.My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.Comment
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Re: Can you use freeze spray on a live circuit?
I was gonna say, "When else would use it?" We used to use it all the time to find overheating parts. But as was said, don't shoot it on too thick.Presonus Audiobox USB, Schiit Magni 3, Sony MDR-V700Comment
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Re: Can you use freeze spray on a live circuit?
Yeah I understand what you're saying.. It's just that every book I read said that you should apply the spray and THEN turn on the circuit... None of them say turn on the device and THEN apply the spray.....
I just dont want to damage what I'm working on.Comment
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Hello everyone,
About me, my goal and the equipment I (don't) have:
I am brand new to this forum, and I am eager to learn about repairing laptops. I have an engineer background although I haven't done electronics for a while. I have watched several Youtube videos in the last two months, trying to understand how to diagnose a faulty motherboard. I have a USB-C Amp meter and a classic multi meter. No DC Power Supply to inject voltage, no soldering iron to replace components.
About my issue and my goal:
A friend of mine has a MacBook Air M1 A2337 that does not... -
Hello. I will be buying new apartment to live. But fuse box is older. Not the newest.
And my question. It will be fine to plug pc in this new apartment with that fuse box,i think it is aluminium,right?
PC WILL BE: Rtx 4090,14900K,1600W PSU
It looks like this ( screen from internet ). Looks like this,not sure i dont take a pic from there. Can i plug pc with that one?
screen of this:
room:
Someone said this to me.
1
"I would get advice from a local electrician... -
Hello.
I have seen a short circuit tester made with 3 * 9V batteries, a voltage limiter component and a resistor connected to the probes of a multimeter.
The theory is that the meter becomes sensitive enough to read very low resistances and the lowest resistance to ground on a circuit is likely to be a short circuit in that area.
Link
The Amazing $1 Short Finder Upgraded! Convert ... - YouTube
https://www.youtube.com/watch?v=0eixDdCpiO4
My multimeter isn't normally sensitive to very small resistance, but when I put a 1 mega ohm resistor... -
Hi,
I am repairing a ups which doesn't turn on ,it has the following ICs:
SG3525 used to drive inverter mosfets.
couple of uc3483, one for the power supply and another to drive a big mosfet at the output stage(i think the technique is called boost)
A LM358 and TL074 for control mechanism and of course the uController.
The SG3525 is shutting down every time the ups is turned on.
I want your help to know the function of LM358 and TL074 in the system.
I reverse engineered the LM358 circuit and i think that one of the block(A) is used for battery level... -
Hello. MSI B250 Gaming M3 board, short-circuit on the power supply. Found a problematic mosfet VQ1
(N-PK616BA_PDFN8-HF) soldered it out - short circuit is gone. I replaced VQ1 + VQ5 (N-PK632BA_PDFN8-HF). VQ1 was replaced with PK618. After starting attempt VQ1 is lit again. What can be the problem? In the driver?
Schematic and Boardview here
...04-04-2025, 03:57 PM
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