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Thread: ESAB em215ic part identification

  1. #1
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    ESAB em215ic part identification

    This welder does not power on and looking at a thermal image I'm seeing the hotspot on R79. The cap comes off pretty easily and under it is a disc made of some type of conductive material. Does anyone know what this part is and what is it's function? How much current should I be measuring for at this component?

    Any help would be wonderful.

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    Bryan

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    Re: ESAB em215ic part identification

    Did you check the voltage coming out transformer in photo.

    Most time with electronics it is transformer or rectifier that dies.

    Dave

    Quote Originally Posted by 11Hopeful View Post
    This welder does not power on and looking at a thermal image I'm seeing the hotspot on R79. The cap comes off pretty easily and under it is a disc made of some type of conductive material. Does anyone know what this part is and what is it's function? How much current should I be measuring for at this component?

    Any help would be wonderful.

    Regards,Name:  J105.PNG
Views: 121
Size:  1.32 MBName:  20220722_232647.jpg
Views: 116
Size:  74.7 KBName:  20220723_090807.jpg
Views: 117
Size:  55.0 KBName:  20220723_090828.jpg
Views: 114
Size:  57.1 KB
    Bryan

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    Re: ESAB em215ic part identification

    I'm not sure if power has reached the transformer at this point? Does ESAB provide a more in depth manual for this?

    Quote Originally Posted by smithdoor View Post
    Did you check the voltage coming out transformer in photo.

    Most time with electronics it is transformer or rectifier that dies.

    Dave

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    Re: ESAB em215ic part identification

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    A couple of images for reference.

  5. #5
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    Re: ESAB em215ic part identification

    Could it be a rectifier disc of some type?.......Mike

  6. #6
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    Re: ESAB em215ic part identification

    I know it's shorting out and not allowing voltage to go beyond that point. Does anyone have a manual?

  7. #7
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    Re: ESAB em215ic part identification

    Here's a service manual link that might help. You don't show what kind of board it is. Hard to help. Need a bigger frame of reference.
    https://www.manualslib.com/manual/12...page=61#manual
    Esab Migmaster 250
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  8. #8
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    Re: ESAB em215ic part identification

    My guess is that it is a fuse.
    Esab Migmaster 250
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    Smith Oxy Fuel setup
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  9. #9
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    Re: ESAB em215ic part identification

    Quote Originally Posted by lugweld View Post
    Here's a service manual link that might help. You don't show what kind of board it is. Hard to help. Need a bigger frame of reference.
    https://www.manualslib.com/manual/12...page=61#manual
    Large photos of board.
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  10. #10
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    Re: ESAB em215ic part identification

    It appears to be a positive temperature coefficient thermistor - part of the inrush limiting circuit.

    Jack
    Last edited by Jack Ryan; 2 Weeks Ago at 07:35 AM.

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    Re: ESAB em215ic part identification

    I think you are on the right track Jack. I'm contemplating taking the disc out and testing to see if I can get it to power up.

  12. #12
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    Re: ESAB em215ic part identification

    Have you tried a continuity test on that disk? If it is temp controlled and has opened from high temps, you might be able to get it to close again by letting it sit in the freezer for a little while like say a half hour or so. I had to do that a couple of times with a microwave after baking potatoes in the nuker.
    Lincoln, ESAB, Thermal Dynamics, Victor, Miller, Dewalt, Makita, Kalamzoo. Hand tools, power tools, welding and cutting tools.

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  14. #13
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    Re: ESAB em215ic part identification

    Quote Originally Posted by N2 Welding View Post
    Have you tried a continuity test on that disk? If it is temp controlled and has opened from high temps, you might be able to get it to close again by letting it sit in the freezer for a little while like say a half hour or so. I had to do that a couple of times with a microwave after baking potatoes in the nuker.
    Freezing electronics is a great way to troubleshoot bad components. Canned air turned upside down works pretty well.

    One of my old cell phones has a shattered screen. To make the phone cut on I have to stick it in the freezer for about half an hour.

    Sent from my Lincoln Buzzbox using Tapatalk

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    Re: ESAB em215ic part identification

    I don't buy canned air. I just dial down the psi on the compressor but thats a neat trick.
    Lincoln, ESAB, Thermal Dynamics, Victor, Miller, Dewalt, Makita, Kalamzoo. Hand tools, power tools, welding and cutting tools.

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    Re: ESAB em215ic part identification

    I tried the freezer trick unfortunately continuity reading is still zero

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    Re: ESAB em215ic part identification

    My understanding is that on those things is that the continuity increases as heat goes up. That would be related to turning on a switch or sensor at a particular temp.
    Esab Migmaster 250
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    Re: ESAB em215ic part identification

    Anyone know what might happen if I remove the ptc thermistor and plug the machine into an outlet?

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    Re: ESAB em215ic part identification

    Quote Originally Posted by lugweld View Post
    My understanding is that on those things is that the continuity increases as heat goes up. That would be related to turning on a switch or sensor at a particular temp.
    That's right. This one limits current until it heats up and then the relay operates. It is part of the inrush suppression circuit.

    Jack

  20. #19
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    Re: ESAB em215ic part identification

    Quote Originally Posted by 11Hopeful View Post
    Anyone know what might happen if I remove the ptc thermistor and plug the machine into an outlet?
    Probably not.

    The thermistor may be collateral damage, not the fault itself. There is a power up procedure given in the service manual.

    Examine unit for any visible signs of damage.
    In order to prevent tripping wall fuses and/or causing damage to the unit when power is applied, it is recommended
    that the following components be checked prior to connecting unit to mains power:


    1 MAINS POWER CABLE INPUT POWER CABLE/PLUG
    2 SW1 ON/OFF SWITCH
    3 CB1 CIRCUIT BREAKER
    4 VR1 VARISTOR on POWER PCB2
    5 BR1/BR2 BRIDGE RECTIFIERS on POWER PCB2
    6 PTC1/RY1 PTC1 (R79) & INRUSH RELAY (RY1) contacts in parallel on POWER PCB2
    7 D49 & D50 DIODES on POWER PCB2
    8 Q19 & Q21 PFC TRANSISTORS on POWER PCB2
    9 C35-3 WORKING CAPACITORS on POWER PCB2
    10 Q3,4,6,7 SWITCHING TRANSISTORS on POWER PCB2

    Without the thermistor, the mains CB will probably trip - even if everything in the machine was working.

    Be mindful of the voltages on that board - you may end up with a fault yourself.

    Jack

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    Re: ESAB em215ic part identification

    Failed test on # 8.
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  22. #21
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    Re: ESAB em215ic part identification

    I checked what I think are the Mosfets? I see 8 of them on the power board. Are all Mosfet legs when starting from left to right prongs in this order (gate, drain, source)?
    If so, I put a multimeter neg lead to the source and pos lead to drain on the diode test and found 2 that are shorting out.
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  23. #22
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    Re: ESAB em215ic part identification

    I had mentioned there are what I think are 8 mosfets but there is 2 that I can only see 2 legs sticking through the board.
    I think they are also mosfets but could someone clarify?

  24. #23
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    Re: ESAB em215ic part identification

    I need to see if other components in the surround area were also damaged. Does anyone know what those black objects are?
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