Sh-633 ex2059
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Thread: Sh-633 ex2059

  1. #1
    Join Date
    Apr 2020
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    Default Sh-633 ex2059

    Hello everybody,

    I have recently run into an EX2059 - Safety Circuit Input Signal alarm on my machine. Now generally when we have issues with this machine it comes back to a worn out contactor. However having gone through the entire cabinet twice checking all contactors (Coils and contacts) as well as fuses, and breakers I was unable to find anything. So I thought being a EX2059 alarm it would likely be with my door safety switch. I check the coil which was fine and the voltage there seem slightly low but should be just fine at 23.8 volts. Just as a precaution I checked the board which the door switch plugged into and found something rather interesting, it would appear I have a diode right next to the plug for the door lock that has released it's magic smoke. However we all know how you can end up with rather strange smoke looking garbage on wires and such in these cabinets I thought I would run it by you guys and see what you think. Keep in mind I did manage to wipe most of the smoke residue off the diode while testing it, it did read OL one direction and about 480 the other direction however the ends look good and crunchy. I suppose it could have come from the resistor below but it appears to be in good condition. I also have not yet checked the back of the board.

    Thanks in advance for your thoughts on this one!

    sh633-burned-board-2.jpgsh633-burned-board-3.jpgsh633-burned-board-4.jpgsh633-burned-board-1.jpg

  2. #2
    Join Date
    Apr 2020
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    Default

    After reading through what I posted it occurred to me I should probably include which board it was. I have included a picture of the board's part number.cell-3-back-board-pic.jpg


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