Hi, found this topic by searching the internet for info on a controller board from an broken down MIG-welder from a friend.
I borrowed this quite old welding machine for quite some time, working ok.
Now he needed it himself but all it did was generating a bang and a bit of smoke
So he opened the case, finding one of the capacitors on the PCB had blown up.
I'm very glading finding the operation manual on the Murex-site, containing the PCB-schematic.
The condensator thats defect is in the powersupply circuit.
Its al fairly simple electronics, so should be able to repair it myself.
@Andychud:
Is the R26 you refer to, the one in the schematic with the arrrow pointing to it?
If so, the value of this resistor is 1 Kohms at my PCB.
Exactly the value you ended up with...
It's not the same PCB, a 'bit' older, but there's not much difference.
After replacing the defective capacitor I will check the functioning of the PCB, before putting it back in the welder.
Also will check the functioning of the gasvalve, wire-motor, power supply, etc...
Dennis
I borrowed this quite old welding machine for quite some time, working ok.
Now he needed it himself but all it did was generating a bang and a bit of smoke
So he opened the case, finding one of the capacitors on the PCB had blown up.
I'm very glading finding the operation manual on the Murex-site, containing the PCB-schematic.
The condensator thats defect is in the powersupply circuit.
Its al fairly simple electronics, so should be able to repair it myself.
@Andychud:
Is the R26 you refer to, the one in the schematic with the arrrow pointing to it?
If so, the value of this resistor is 1 Kohms at my PCB.
Exactly the value you ended up with...
It's not the same PCB, a 'bit' older, but there's not much difference.
After replacing the defective capacitor I will check the functioning of the PCB, before putting it back in the welder.
Also will check the functioning of the gasvalve, wire-motor, power supply, etc...
Dennis