why can't i substitute solder lead as wires?

>>1040742
Shorting the thermal fuse should leave the transformer as good as new, you probably fucked up and shorted live and neutral somehow, maybe it shorted through the body or maybe you shorted something that wasn't the thermal fuse, who knows. There shouldn't be any problem when shorting the fuse with lead solder, although the resistance is higher than copper is still negligible for such a short connetion.

>>1040742
>>1040745
Or the original fuse blew for a reason (because there is a short somewhere else) and OP created the equivalent of another fuse made out of solder, which promptly blew for the same reason the first one did.

>>1040748
>fuse blew for a reason

Realistically, aside from OP fucking up, this is the only reason a solder jumper would fail like this. Replacing a fuse with solder is a fairly common ghetto-rig solution in PCB repair, and works fine as long as the fuse itself was faulty.

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>>1040745
>you probably fucked up and shorted live and neutral somehow
but that's the place where the fuse was blown.i draw the diagram and soldered the lead at the back side of the pcb.
>>1040750
>>1040748
fuck so you are saying another place on the board broke?

>>1040750
>>1040748
why would a part that broke elsewhere affect the primary winding of the transformer? if the fuse was at the secondary coil then i would at least understand. i mean how would a voltage jump backward through coils?

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>>1040752
let say that this capacitor broke, how would that affect the fuse at all? they aren't even touching.

>>1040751

I can't tell if _I'm_ the stupid one for not being able to make out exactly what this "schematic" is trying to tell me...

Are you SURE this was a fuse, and not something like an inrush current limiter or PFC capacitor?

>>1040752

OP said nothing about the electrical location of the fuse, just that it was "inside transformer".

>>1040758
hey, thanks for your reply. while i am not sure what 'inrush current limiter or PFC capacitor' are, i do know the fuse like thing has a (130 C 180) written on it.
the blue lines are primarys, orange are coil, purple is the open fuse.

>>1040759
and the wire 2 is the hot(live) wire.

>>1040754

Okay, issues:

Is this a mains transformer, as in, does it work automatically by being connected to 60Hz 120/240VAC, or is this the transformer on an SMPS?

Seriously, what the fuck is that "fuse" connected to ELECTRICALLY? Your drawing isn't at all clear, other than that 120V gets in _somewhere_ on some combination of wires 1/2/3.

Have you probed this thing with a multimeter at all to see if there's a short somewhere?

>they aren't even touching

It's a transformer. Even if it's an isolated one. current on one winding is proportional to current on other (ideally speaking). Larger mains transformers can sometimes handle having their secondaries shorted, thanks to their leakage inductance and sheer size being sufficient to prevent excessive primary current and overheating. Smaller ones will generally overheat, and fast, in the same condition.

>>1040760

Then what the hell is 1? Because if it's in ANY WAY connected to a mains line other than hot, you have a dead short across your input.

>>1040759

Picture of part?

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>>1040761
i don't know how to identify smps or linear board. i just know the input to this board is 120v. and the picture is exactly the same as my.
wire 1 is neutral, wire 2 is hot. wire 3 goes somewhere else idk. right now the thermal fuse connecting wire 1 and 2 is open.

>>1040767
>>1040768
i am referring to this picture >>1040751

>>1040767
>dead short
wait, so you are saying the diagram i drew is impossible? maybe that's possible, i might of missed some hidden wires inside the transformer, since i didn't open it.( just peeled off the bottom). but i know for sure wire 1 is connected to neutral and wire 2 is hot.

>>1040768
>>1040771

If that's the case, whatever that is CANNOT be a fuse.

Think about it...it would literally just be a 0Ω connection between live and neutral. The very definition of a short. Of course it's going to immediately explode of that's the case. You're lucky if that's ALL that explodes, for that matter.

If it actually is connected that way, the only thing I could think it is would be a MOV; metal oxide varistor. They're used to suppress high-voltage surges on the power line.

Honestly, you're probably out of your league on this one. You really need to probe the board and transformer and figure out what's what before you try fixing things.


Image means nothing to me. Without an electrical diagram, there's no way to figure out what any of that crap is (other than the really obvious stuff) or how it's connected.

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>>1040774
shit you are right. i just went double check again and i drew the diagram wrong.
the fuse is between wire 2 and 3. i am an idiot.

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>>1040779
just to clarify again since i drew the diagram wrong.
also the thermal fuse is like pic related.

OP, post pictures of the real board, or the schematic. Because renderings of parts floating in space are totally useless.

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>>1040790
i don't have a cell phone. but thanks anyway. i will try again tomorrow. if it is as >>1040761
said, then the problem may be caused from another board.
tomorrow i will disconnect all other board connecting to this one other than the power source. then solder again.

I noticed your prior OP, OP:

https://i.warosu.org/sci/thread/8277185

I spent a lot of time trying to help OP in his original thread.
I finally gave up when I realized this OP is not a faggot - he's just an idiot.
He has no idea how this works or what he's doing.
If you fall for his 'help me guize' you're knowingly wasting your time.

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>>1040793
hi, just another a update. i backed off from testing my solder lead connection at the last second. i think i still lack some understanding.

after i soldered the wire in the transformer, i run a continuity test on my power plug with my multi meter. and all three wire seems to have some sort of continuity between them. 94 ohm resistance between black and white, 94 ohm between white and red wire, and ~185 ohm between black and red.
is this how it supposed to be? would my transformer explode again if i plug it in?

>>1041079
hmm sorry i never told you guys that the machine that broke was the stove. i asked my mother today for the camera and took the pictures.
the 120v that came to the pcb is from the white and red wire.

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>>1041086
picture uploaded upside down*

>>1041090
i tried
just to add the red and black wire is hot, supposedly with 120v. and white is neutral.

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>>1040742
>>1040745
>>1040748
>>1040750
>>1040751
>>1040752
>>1040754
>>1040758
>>1040768
>>1040784
>>1040886
>>1040790
here i added more pictures. you should be able to see the 'open' thermal fuse i pocked out,

File: IMG_1165.jpg (2MB, 2448x2448px) Image search: [Google]

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>>1041106
and here is the back side, i added the description as well, so i don't think people will get confused anymore.

File: 1297218400449.jpg (56KB, 366x389px) Image search: [Google]

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>>1041079
hooray i mustered my courage and tested with my solder lead again. this time it freaking worked :0
i have no idea why the lead blow up last time, but perhaps its is either because of poor conductivity or i wired at the wrong point (not that i remember).
my other thread also got deleted for some reason, idk why >>1041130
but since it got resolved i shall attempt the answer. it is normal for the black/white/red wires to have continuity (with some resistance) as long as there are electrical loads between them. so i guess in my case the transformer is the load.that connected those wires.
thanks for >>1040750,
>>1040761 >although this didn't appear to happen.
and >>1040774
for correcting my diagram.

>>1041090
Totally looks like you connectors are .01 mm away from the chassis.

>>1041183
Gawd, you are a total idiot and a total asshole. You literally understand zero about electronics and even though your problem is "resolved" you have learned nothing and everyone that tried to help you is still frustrated.

Good luck, and I sincerely hope that your stove doesn't have a smoke detector above it.

>we 2-phase nao

You really should figure out why the fuse blew in the first place.