jm1234
Senior Member
Last Activity: 01-03-2026, 01:02 AM
Joined: 01-12-2024
Location: Horna Dolna
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fwiw, I tried again with 23V and 200mA and this time it worked. I was able to charge the battery pack to some 21.2V, each cell has 3.53V now. -
I was charging them for few seconds. The voltage on them raised from 19.9V to 20.0V too. If they were too low, I wouldn't have seen no charging then.
Also, the vacuum cleaner just stopped working minutes before that. Extremely unlikely the batteries got all of sudden drained too much.
After those charging attempts, I put the battery back and the vacuum started to work (just few seconds).
I'm pretty sure it's not the under-voltage protection blocking me, but what do I know.Leave a comment:
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Just noticed 3 indication leds on the oposite site and they all flash every 2 seconds when I connect my power supply. Probably some error condition, I take that as a confirmation something got blown on the pcb.Leave a comment:
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No I don't have any. More than saving this battery pack I'd like to understand why it's now not accepting any charge. My only explanation, sadly, is that I blew something on the pcb.
Do you think a lithium charge would still help?Leave a comment:
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Samsung Powerstick vaccum VS03R6523J1 battery pack not accepting charge
Hi,
Samsung Powerstick vaccum VS03R6523J1, I don't have the charger. The battery pack has 3 outside pins: positive, negative and the middle one (not labeled).
I measured voltage and there was none. I opened up the cover, found 6 cells, each measures 3.35V and there is also a pcb there.
I tried to charge the outside +- pins with my power supply, it was accepting the charge at first (24V, 0.4A). Then I upped the current to 1A and after few seconds it stopped accepting the charge.
Now no matter what I set on my power supply, it doesn't do anything.
Did I blow it up?... -
The diameter of the whole in N9 tips seems to be 4.6mm and the diameter of the heating element on my iron is 4.3mm. I don't think that matches Hakko 900M, but pls correct me if I'm wrong here.
Fwiw I bought these https://www.temu.com/goods.html?_bg_...01102661131350 just to see if they match, but they don't. They are too loose for my iron.Leave a comment:
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Soldering tips N9-XXX for ZD-8916
Hi,
I have soldering station ZD-8916 and I only see like 6 different soldering tips being offered, eg. by tme: https://www.tme.eu/ie/en/details/zd-...er-peak/n9-26/
Very limited variety, I'm missing a chisel ones, it just doesn't exist.
I thought to myself everything is available in china, but they don't seem to be using the same nomenclature. Searching in aliexpress or temu for N9 tip doesn't find anything.
Is there perhaps equivalent type to N9 I should be searching for?
Or is my soldering station that weird and I just shot myself into a foot?... -
What glue is being used for these types of cables? Any chance of undoing and re-gluing it back in properly?Leave a comment:
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I think it has something to do with this band/cable peeling off of the glass. Manipulating with it I can see the segments going on/off. However, even when pressing on that peeled off part, I was not able to get all the digits displayed.
...Leave a comment:
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Projection display radio - some segments not lighting up
Hi,
alarm clock radio Oregon Scientific RRM320P, it projects the time on the seiling.
However only part of the segments is lighting up. Any idea what could be behind this issue?
Note I'm NOT talking the main display here.... -
How about this one then? It's called electrolube, but reading the data sheet I have no idea whether it conducts or insulates: https://www.badcaps.net/download/?id=e2901928Leave a comment:
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Would this be considered a dielectric lube? https://www.badcaps.net/download/?id=998e1fbc
If not, can you suggest one?Leave a comment:
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fwiw, I applied the conductive lacker I linked above, but sadly it only lasted some 2 months.Leave a comment:
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Reolink RLC-410-5MP - buck convertor
Hi,
it's a PoE camera and it stopped working. Using thermal image I identified failing component U22 marked as 16AF which seems to be buck convertor TI https://www.alldatasheet.net/datashe...62569DBVR.html. I took it out and It is inteed shorted on the output. However, after I took it out, the resistance between the output pads (on the board) still shows 190ohm, is that bit low?
Another issue is, seems to me I must be missing one of the tiny resistors R810 that should make up the voltage devider for the buck convertor. Honestly I did this months ago, I cannot... -
Thanks for all the help, I ordered this conductive lacker:
https://www.tme.eu/en/details/lak-gr...y/art-agt-022/
Will apply it hopefully this week and will also set reminder for me to report back in 6months or so.Leave a comment:
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microwave rotary switch contacts go bad requently
Hi, I have a 11 year old microwave Siemens and the main function selector switch is a rotary type. It goes bad every few months, there are carbon (?) pads and the metal contacts that drive on them create concentric circle tracks from the residue.
I clean the tracks and the metal contacts with IPA and it works few months again. Here you can see the contacts:
Once I tried this contact cleaner: Kontakt 60 https://www.badcaps.net/download/?id=acef4218, but it only lasted few weeks, so probably not a good choice.
Is there any more lasting solution?... -
Found the issue, it was right between the chair and the desk. Mistake on mistake, but I did figure it out. I was tracing why those other caps don't have any voltage and it turns out there is another lower-voltage supply on the 3rd pin on that big connector. I was going off of my memory since I got back to looking into this, so that's what I didn't remember. The cases when I was able to make the board come alive must have been when I accidentally connected my power supply to that 3rd pin I guess.
What i don't understand is that voltage supply on 3rd pin comes directly from transformer (so...Leave a comment:
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Well, spoke to soon. Sometimes the board comes alive (even with 31V bench power supply), but most often it won't. I cannot find out why. I tried to heat the board up from down below, but it didn't make any difference.
The power supply shows few mA for a moment, but then it goes into 0mA, so nothing seems shorted. The 1st 2 caps (around that burnt diode) get charged, but nothing else does.
I cannot work out how the rest of the board should get powered. Neither of the 2 DC-DC chips have any power either.Leave a comment:
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Light bulb is connected to 2 of the 4 separated pins where that longer relay is. I commented on the polarity of the caps above....Leave a comment:
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