Electronics > Repair

FIX - Parkside Cordless Soldering Station 20V PLSA 20 Li B2

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mikerj:
Big Clive just released a video on modifying this unit:

hibone:
My 2 cents.
I got the PLSA 20 LI B2 a couple weeks ago and I attempted the fix suggested by Big Clive, while also measuring the temperature with a multimeter based termocouple.
I put in a 44 ohm resistor and the temperature reached 380°C whereas Big Clive registered about 350°C. I also tried out a 120 ohm resistor, but the temperature increased to 380°C all the same, and moreover the led started blinking green and the soldering iron shutted down.
 

Kurets:
The temperature sensor in the iron is an RTD at least. I tested it by heating it with another soldering iron and it behaves as expected. I modified mine with 33R extra and got 370C when the LED goes green.

Now I think that in practice it would be nicer to replace the whole circuit. I suspect that the brushless motor controller they are using is only "just" managing to control the temperature and any unexpected behaviours causes it to freak out.

i attempted adding 15R and for some reason this increased the temperature. Similarly, changing  the 499R surface mount resistors to different values also upsets the circuit.

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