Electronics > Beginners
Soldering station Quicko T12-943 no power
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draza:
Hi everyone,
I am electronics beginner who bought this little soldering station from Aliexpress ten days ago. I was very pleased with her until she stopped working today.
After opening, I noticed something strange, and I have a question about it.
The station is powered by an external power supply 16-24v DC 3A(i have cheap D.C. variable bench supply 0-30v 5A, switch-mode).
The question is: What does the resistor do on the DC internal connector between + and - line?
What could be the problems not powering anymore?

Thanks in advance.

bdunham7:
The resistor is not likely your problem, it looks like it is just a bleed-off shunt or ballast.  The colors in your photo are off enough I can't determine the color bands, but just measure the resistor quick and let us know what it is--likely a few dozen k-ohms or so. 

As for it not power up--it looks like the display is on???  Or is that a before-failure picture?
KL27x:
Presumable reason for the resistor is to put some minimum sort of pre-load on the powersupply. Your lab supply is probably fine without it, but some other PSU might have increased noise at low current draw and/or the voltage might drop significantly when the heater turns on and the current draw increases.
draza:
The resistor is 1k, voltage comes to the board. Here's another picture of the board itself.
The last picture is before sudden death.  :(
bdunham7:
OK, so details matter in troubleshooting as we aren't there to see it.  Brevity is not helpful!

If  I understand you, you have power voltage measured at the top two terminals where the red and black wires plug into the board, presumably measured by backprobing at those two terminals?  And the device now shows no signs of life whatsoever, no display, no nothing?

To answer your original question, the resistor would appear to have nothing to do with the problem.
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