My AIXUN T3A soldering station died after only about 4 or 5 months of use. Let's take it apart, try and diagnose the problem and hopefully repair it!
UPDATE:
I managed to find some schematics that someone reverse engineered:
https://github.com/c0d3z3r0/aixun_t3a_rev/blob/master/schematics/aixun_t3a.pdf
I eventually replaced the diode on my unit as I think it was breaking down or had a bad internal connection. It seems the heat from the iron just temporarily restored it for a couple of weeks, as the fault re-occurred a few weeks later. Heating the diode seemed to make it work again.
The diode appears to be a 4.7v Zener I replaced it with a LL34 SMD Zener Diode 0.5W
The mystery power supply IC is a MP9942GJ-Z
#electronics #electronicsrepair #electronicscreators
AIXUN repair
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