A thorough look at the assembly of the generic Chinese soldering irons often supplied with thermally controlled soldering stations. These are a very refined design with lots of neat features in the assembly.
Whole soldering irons or their various components like heating elements and bits can be bought at staggeringly low prices online.
It's a bit galling that for the cost of one pack of spare bits for my older style mains Antex iron I can buy 30 or more replacement bits in a wider range of styles for these generic irons. I guess they must be considered a disposable item in the Chinese electronics manufacturing industry
It's worth noting that the soldering stations have a calibration facility on them to fine tune the thermocouples. If you inadvertently set the calibration to an extreme level and get distracted the iron can reach a red hot state!
I've not tested the iron at this stage due to waiting for my preferred style of bit (3mm chisel) and the disconcerting smell of hot transformer and surprising case temperature on the base unit!

17 thoughts on “Inside a cheap chinese yihua soldering iron.”
  1. Avataaar/Circle Created with python_avatars That's Funny 77 says:

    Love my Yihua station.

  2. Avataaar/Circle Created with python_avatars Hadi says:

    yep those are robust and nice to use when the station is roughly accurate in managing the temperature. nice old video 😉👍

  3. Avataaar/Circle Created with python_avatars Ipsum the Purple Wuss - Loud Nation says:

    Im sure the actual pronunciation is "yee whaa"
    But "yeehu-ah" is good enough. Lol

  4. Avataaar/Circle Created with python_avatars john halamka says:

    i would like to try less than 120 volts on a red soldering iron. maybe 60 – 80 volts.

  5. Avataaar/Circle Created with python_avatars drsquirrel00 says:

    Does the air gap between the element and the tip matter that much?

  6. Avataaar/Circle Created with python_avatars Nate says:

    Wait you need to solder the soldering irons circuit board to repair it…but your soldering irons broken… Noooooooo

  7. Avataaar/Circle Created with python_avatars Ricardo B says:

    I have one Yihua 939D+, I use it for 3 years 7 days per week without any issue.
    This is a very good option if you are in budget.
    I have a Hakko FX-888D but I prefer the Yihua because it have 3 memory easy to reach.

    Best Regards.

  8. Avataaar/Circle Created with python_avatars madnoob2009 says:

    Hi Clive! Did you come across the SH72 iron?

  9. Avataaar/Circle Created with python_avatars 50 shades of the dominator says:

    Well don't be shocked if the design is good, if it is indeed based off Hakko, which are Japanese soldering irons that probably are the best quality ones in the world. And this Chinese company Yihua is indeed a proper company, so there will be quality involved, it's not like an unbranded ripoff for example. I think Yihua is what most Chinese use, so for example in China they don't generally use the unbranded ripoff stuff that some naive foreigners waste their money on, in China they usually find a good Japanese or other foreign design, and have a legit Chinese company try to clone it at a decent level of quality, so the domestic Chinese workers can have a reliable product etc.

  10. Avataaar/Circle Created with python_avatars irishguy200007 says:

    Is this Antex ok for smd work

  11. Avataaar/Circle Created with python_avatars Chucky Gman says:

    You should go on ebay and search for those tips there You have better luck finding them There What about size you looking for.

  12. Avataaar/Circle Created with python_avatars I967 says:

    I've had this soldering station for almost five years now and it has been working perfectly, I have never had a problem with it.
    Mine is the same as all the basic 936 clones with a black plastic face and plastic knob to set the temperature, but mine says "W.E.P. 936 ® sol dering station," printed exactly with that space between "sol" and "dering." Perhaps a limited edition. I have no idea what could W.E.P. mean. But I can definitely recommend the station, it is great value.

  13. Avataaar/Circle Created with python_avatars I967 says:

    I've had this soldering station for almost five years now and it has been working perfectly, I have never had a problem with it. Mine is the same as all the basic 936 clones with a black plastic face and plastic knob to set the temperature, but mine says "W.E.P. 936 ® sol dering station," printed exactly with that space between "sol" and "dering." Perhaps a limited edition. I have no idea what could W.E.P. mean. But I can definitely recommend the station, it is great value.

  14. Avataaar/Circle Created with python_avatars Lachlan Hamilton says:

    I got a 3 pack of the 2mm slanted tips for about £12

  15. Avataaar/Circle Created with python_avatars CrazeUK says:

    I have learnt to hate these Yhiua irons. I bought 2 one after another. After one use i now get the 5-E error.

  16. Avataaar/Circle Created with python_avatars Andy Tipping says:

    hi Clive. Up until today, i had a maplin soldering station – precision gold A55KJ – looks exactly like the iron you dissected. Today, it tells me
    " – 5 -E -" [without quotes] which, according to the manual is faulty element. trouble is, if i apply 19 volts at 1.6 amps to it, it heats enough to desolder the triac that should control the temperature to it – for testing – it too is fine. My question is – how can the unit detect the temperature of the iron – with pins 1+2 and 4+5 shorted out? [no thermocouple] I cant find a diagram for it anywhere and im not clever enough to reverse engineer it as its quite complex.
    cheers in advance – Andy

  17. Avataaar/Circle Created with python_avatars Thirtythree Eyes says:

    Don't bother with the cheap tips. Get some hako tips and you will have yourself a good iron.

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