Electronics > Beginners

Bad soldering iron - maybe even worse

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Gyro:

--- Quote from: fixit7 on June 19, 2019, 03:33:23 pm ---
--- Quote from: Gyro on June 17, 2019, 06:04:26 pm ---You're being very over-optimistic if you expect to get decent temperature control for $10. Electrically safe would be quite an achievement (especially with a 2 pin mains plug).


P.S. A glowing tip sounds like a shorted Triac in the 'lamp dimmer' circuit.

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If you have a criticism, maybe offer how to fix it?

Andy

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Not criticising you, just pointing out the limitations of very cheap temperature controlled irons (I should also have mentioned that a 2 pin mains powered soldering iron is likely to have a leakage current high enough to damage some sensitive components).

I did indicate the probable failure (shorted Triac), unfortunately you will need another cheap soldering iron to change it.  ;)

Jwillis:
I have one like that and it does the same thing .Glows red hot.But if your really interested in repairing it, the TRIAC is a BT134-600.The element is 2 wire ceramic like the kind in a YIHUA 908+. Theirs a 110 and 220 types .the whole thing is a very simple design.

fixit7:
Here is the winning iron. :-)


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