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2nd November 2013, 07:24 PM #1Member
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ESAB Power Compac 200 ECP mig welder- faulty circuit board
Hi Guys,
I have been given an ESAB 200 Mig welder with a main circuit board fault. The welding wire is live when the welder is on. I have been told the wire feeds ok when welding. Someone has removed a .1uf capacitor from the circuit board in an effort to get the welder to work I think. Can anyone recommend someone to repair the circuit board or suggest which part may be causing the fault. There are 4 black wires that have been removed from a strip of 4 terminals on the board when the board was removed, using the circuit diagram I have not been able to work out which terminals they go on. If anyone can help that would be great. I have attached photos of the main circuit board to help identify it.
IMG_8781.jpgMain circuit board 2.jpgmain circuit board PC side.jpg
John
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2nd November 2013 07:24 PM # ADSGoogle Adsense Advertisement
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2nd November 2013, 09:37 PM #2
I have a 200 esab compact mig, not too sure on exact model but will check it out Monday or Tuesday, doing a run in the truck early in the morning and will be back home sometime Monday.
Cheers
DJ
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3rd November 2013, 10:02 AM #3Member
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- Dec 2010
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Thanks M8, Looking at the board, at the top are 5 terminals. . wires marked 01 & 03 go to a circuit board for "wire length" adjustment. The other two wires -4- & -5- go to a green button for "wire Inching". I am guessing the wires go 01 ( terminal 1 ), 03 ( term 3) , -4- ( term 4) , -5- (term 5) , on the terminals from left to right. The circuit board does not have the terminals numbered so cant confirm this.
Further testing shows the arc & gas are present whether the trigger is on or off. Looks like the main circuit board is faulty. Does anyone know if these can be repaired or is a new board required ?
John
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3rd November 2013, 08:11 PM #4Senior Member
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- Mar 2008
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- Australia
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- 141
As a general comment, most circuit board problems can be fixed, since it's usually just one dead component an the parts are mostly generic - capacitors, diodes, transistors, etc. Finding a pro to do board level repairs is hard or expensive.
You can DIY if you are interested getting into electronics, but would need some equipment - at least a soldering iron and a multimeter. An ESR meter is really useful for electrolytic capacitor failures, probably #1 on the fault list. But the cheap option is to just replace the electrolytic caps and see what happens, for a few dollars, nothing lost. Semiconductors can be tested.
Peak electronics UK makes some really nifty test equipment. I have a set, bought direct for a lot less than local prices.
The missing capacitor is more likely to have been deleted by designers as unnecessary.
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3rd November 2013, 08:36 PM #5Member
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- Dec 2010
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- Morayfield, Queensland
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- 51
No worries, thanks for the input. I have a tech background so will change the caps first. I have the cap that was removed by a previous attempt at repair, it was not a design problem.
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3rd November 2013, 09:27 PM #6SENIOR MEMBER
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3rd November 2013, 09:47 PM #7GOLD MEMBER
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The last time I spoke to ESAB some months ago they had an office in Brisbane. I just did a search and found this Support
I think they are still in Brisbane but have reverted to and agency type operation.CHRIS
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4th November 2013, 09:34 AM #8Member
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- Dec 2010
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- Morayfield, Queensland
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Its not actually a circuit diagram, more a wiring diagram of how the parts interconnect. I think I have managed to nut out how the wires go back on the main board. Terminal numbers on the board would have helped. I will chase up the ESAB contact No today to see what a new main board costs. Even though the welder is old it seems very well made.
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4th November 2013, 10:34 AM #9GOLD MEMBER
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- Jun 2005
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I had wire feed issues with mine and the repairer asked me to sell it to him, he likes them that much.
CHRIS
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4th November 2013, 08:07 PM #10
Ok, I'm back home, will look at mine tomorrow and take some pics
Cheers
DJ
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5th November 2013, 12:44 PM #11
Ok, wires 1 & 3 go to the burn back control with 4 & 5 going to the wire feed button.
Terminals numbered 1 thru to 5, 2 is empty
ImageUploadedByTapatalkHD1383615651.376021.jpg
Back of burn back control
ImageUploadedByTapatalkHD1383615692.616008.jpg
And wire feed button
ImageUploadedByTapatalkHD1383615719.856045.jpgCheers
DJ
ADMIN
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