Dear members, i am trying to troubleshoot a cebora mig welding machine but do not know where to start from. This welder has two selector switches, 0-2 (first selector) and 1-6(second selector). At first, it could not work with any combination with 1 on the second selector but could work with the other combinations despite the resulting power being low. Right now it can nolonger work with any combinations. The display shows dashes (- - -) and am wondering what could be wrong. I am beginning to think that a component in the electronic circuit is faulty but cant figure out which.

Has any of you ever faced a similar problem? how can i go about this?

i have attached images of the welder.

Thank you.

 

For a start, do you have any electronic experience?
I would think that big socket would have an IC plugged in.
Did you remove it?
Without a circuit it will be pretty hard to proceed.

 

For a start, do you have any electronic experience?
I would think that big socket would have an IC plugged in.
Did you remove it?
Without a circuit it will be pretty hard to proceed.

Yes, there is an IC i just plugged it back. Just took the picture without it but its there.

I can do a bit electronics with instructions.

Thanks.

 

I hope you made sure the IC was plugged in the correct way
This may be a little help..

I'm still looking for a circuit..... Without success

 

It is. Actually i removed it after it had failed.

I saw that manual and all it recommends in a such a situation is to replace the whole board.

 

Is there a way i can bypass the electronic circuit and maybe use some relays to control the mig?

Or, are there any alternative circuits that use in place of this with little modification?

 

Is there a way i can bypass the electronic circuit and maybe use some relays to control the mig?

Or, are there any alternative circuits that use in place of this with little modification?

I doubt it is possible to easily do that.
Saying that, there are quite a few Arduino MIG Welder projects on the net if you want to do a search.

 

Is there a way i can bypass the electronic circuit and maybe use some relays to control the mig?

Or, are there any alternative circuits that use in place of this with little modification?

I would start by pricing a new IC, then map out all the part # stuff, check the power on the solid state stuff and see if you can find the fart. Poke around and might find a missing voltage or regulator down or if lucky the ic is bad. Why don't you post the IC #.

 

IC # HD64F3642AP. Could it be a programmed IC specifically for this machine that i should only get it from manufacturer of this welder or can i just source it from any store?

 

IC # HD64F3642AP. Could it be a programmed IC specifically for this machine that i should only get it from manufacturer of this welder or can i just source it from any store?

You will only be able to buy a blank one elsewhere. And the welder manufacturer will not let the code out so it will be buy a pre-programed one from them, if they sell one. But just the chip but that may not fix it, so the full board may be better, if that is what is wrong.
Have you tried it since plugging the IC back in just in case it was dirty IC pins? Make sure it is the correct way or the magic smoke will come out!

 

You will only be able to buy a blank one elsewhere. And the welder manufacturer will not let the code out so it will be buy a pre-programed one from them, if they sell one. But just the chip but that may not fix it, so the full board may be better, if that is what is wrong.
Have you tried it since plugging the IC back in just in case it was dirty IC pins? Make sure it is the correct way or the magic smoke will come out!

I have taken it to a qualified technician to check it out and see what he finds. Will let you know what he thinks. Otherwise, i will have to resort to purchasing a new board like you said.