Vorwerk vk 200 death

[pni]

Hi I have a vorwerk vk200 it didn’t turn on nothing. I checked the main board…and on the MiP2f2 I have a short on the vdd pin and the cl pin that should be not good… if I remove the ic the short on that pin stay still…. So I checked the mosfet g10t60 and also they are good. I checked the diode schottky d06e60 also their look good at the first but if I put the multimeter on both the anode I have short circuit….that is not a good I think… so I remove one by one the diode and when they are out from the board the anode aren’t in short but in the main board there is still a short on the pin where the diode are ….but I don’t find where the short can be. Can someone help me….

[CapLeaker]

Well… look up the diode. If both pins are Anodes (dual diode) it’s gotta measure a short.
Pull up a datasheet from a MIP2F2. Look at the example circuit. The CL has a resistor to VDD and a capacitor. Examin your circuit and see if it truly is like the example circuit and has a resistor and a capacitor.

[lotas]

It's strange, but you can see that the track on the board connects these contacts, that's how it should be!

[pni]

Thanks for your support…yes I watch with more focus and I understand tha track is common…so should not be that the problem…the only thing strange I find it s this smd that marked on z871…should bi a diode maybe I don’t know… and it s shorts but it s in the track of a traformer…I think that trasformer give the 3.3 volts for the processor because it s near. So that smd is short because maybe it s in parallel with the trasformer coil…but the strange thing is if I take away from the board…and test it how it s a diode…it give me always OL in both the way…so if it s a diode…should be open…the current can’t go on the coil of the trasformer so the cpu is off so for that is completely death maybe….but I try to put an other diode smd…but same….didnt turn on ….the z871 if you know is a diode? Because it s not have the grey line like all diode I saw….there is only z871…someone can help me.. I pure the photo and I show u the trasformer and the diode I’m talking about

[lotas]

It could be a protective, bi-anode suppressor, that's why your multimeter doesn't show anything.

[pni]

It could be a protective, bi-anode suppressor, that's why your multimeter doesn't show anything.

thanks Iotas for your help...i give u news....not good news ahah. i was looking around the pic control and i check the vdd voltage and they dont look good they arent stable. around there there are a lot of diode, ic etc so it was over my understanding...but i didnt see nothing bad...so how last try i put the air gun to 400 celsius and i warmed all the board. i try to turn on and i heard clicking...so i put the motor back, and the motor for 3 second starts,..the problem was i didnt see when i warm the board one of a pin of a igbt dissoldering...so after 5 second the motor was on ,something explode on the board. so now i have 2 igbt in short and a gate drive ic exploded. i know the gate control ic is a 2L05I06P, because it s the same on the other 2 igbt on the board. the igbt are g10t60 and on the first igbt i burned two smd resistor 180 ohm and 22 kohm so with about 15 20 dollars i can buy the replace on aliexpress but i dont think i give a try....because honestly i dont understand where the problem was...all looked good...just me burned component ahahah. the problem is shipping is very slow so i have to wait 10 days...and maybe also if i put back them the board will not work...and open the vk200 is not so easy. i bought a new main board...but it s a little different from that i have. change the pic controller and all the circuit around the pic. maybe the board didnt have nothing just a little cold solder...i dont know....but thanks for your help.