Zika A-200 Welding Machine Powers On But Does Not Weld Repaired
The Zika welding machine are very good machine and worth the fix that is what I told the customer when he brought it in for repair.
As the customer waits in the shop, I powered on the device and right away I could see the overheating light coming; an indicating of shorted parts inside this device.
And as expected the machine was dusting and a lot of dirt is accumulating inside the device.
So first of all, with dust buster, I blew all the inside dirt and dust away which gave me a clear clean printed circuit inside allowing me to see what was going on inside this welding machine.
That is the main brain of this welding machine and if you look to the edges of this board you would see markings with positive and negative. In other words all the Mosfets of this device are connected here; in order for me to check which Mosfets are shorted out, use a multi meter set to diode and test these points and that will lead you to the shorted parts. It should give you reading like a diode reading in one direction only and all should be the same reading or close to each other. If one reading is off or gave you shorted reading, trace that line and it will lead you to the shorted Mosfet/s.
This is the first time I am sharing this kind of knowledge about a fast way to find shorted Mosfets in welding machines and it is the same testing in most of these devices.
In doing that kind of testing lead me to these Mosfets that were shorted out and needed replacement. It is 23N50E.
The first photo shows the shorted reading of a Mosfet, the second one showing reading of a good Mosfet. This meter has been a very good assets in my shop and I have been using it ever since.
Click here to view the 23N50E datasheet
I found two Mosfets shorted out. I replaced both with new ones and tested out the machine. I was getting an excellent reading here as it should be in this Zika machines and as always, took it to my brother next door to give it a try and as expected, it performed according to specs.
This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.
P.S- Do you know of any your friends who would benefit from this content that you are reading now? If so, forward this website to your friends or you can invite your friends to subscribe to my newsletter for free in this Link.
Note: You can check his previous article on A PS4 Controller With A Drifting Issue Repaired
January 28, 2023 at 11:13 am
Good job! Readings off of Mosfets are a good way to quickly find failures!
Thank you for the article!!
January 28, 2023 at 2:38 pm
Eric: thanks man. you are most welcome and have a blessed day
Albert van Bemmelen
January 28, 2023 at 4:23 pm
Thanks for the article with new datasheet!
January 28, 2023 at 6:40 pm
Albert: you are most welcome. have a blessed day
January 31, 2023 at 2:08 pm
Good job. I wish I have that kind of meter
February 2, 2023 at 8:02 pm
Good job. Well-done Waleed
January 28, 2023 at 4:51 pm
Well done, welder expert!
January 28, 2023 at 6:41 pm
Parasuraman: thanks man and I appreciate the kind encouraging words. have a blessed day my friend.