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Need help with an older Sync 250

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  • Aeronca41
    replied
    Success is sweet! Thanks for posting the good news.

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  • Crocket
    replied
    Well folks, I got the board back along with a laundry list of items that were repaired/replaced. Installed it and she runs like a top now.

    Thanks guys!

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  • Crocket
    replied
    More updates... Board is confirmed to have issues, not sure what exactly the problems are. Almost $400 in repairs. I'll keep you guys updated once I have the work form back.

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  • Crocket
    replied
    Talked with a rep from Radwell, repair estimate on the board is more than I thought it would be but still about half of what a new one would run. May have the board send out tomorrow to see where we are.

    Cruizer, should i go ahead and try to source a replacement coil for the pic above or should I wait to see what they say about the board?

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  • Crocket
    replied
    Ok, would that coil need to be replaced as well? I found what looks to be Radwell International inc under the plccenter.com. Is this the correct company I would need to send the board to?

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  • cruizer
    replied
    Thats not the cause of your problems , so based on what you've told us, it all points to that board being the culprit. Its highly unlikely that board was sent out to any qualified shop. Replacing caps would NOT have been an issue on the pulse transformers firing or not. Possibly erratic, but the unit would have still worked

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  • Crocket
    replied
    The last pic(from my manuals parts list) shows to be part number 124 650 (Coil, HF coupling).

    I felt the soldier job was a bit shabby as well.. I'll check out PLC. I was really hoping the board wasn't the issue being as it was sent out before.

    Here is a better pic of the coil.. I tried to find it on miller4less but the part number must not be valid anymore.



    Also, is the site plccenter.com? I searched plc but didnt come up anything.
    Last edited by Crocket; 05-30-2016, 10:36 PM.

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  • cruizer
    replied
    Ummm, that board has NEVER been to a capable repair shop. The Capacitor install, solder joints are hidious. Besides those Caps would not hinder the pulse transformers from firing. (4 square things on the side)

    Quite likely a board issue, best to shoot it over to PLC.com, explain that the firing circuit is not working.

    The last pic is kinda dark, though looks like a stabilizer. Maybe shoot us a better picture

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  • Aeronca41
    replied
    Is that some sort of coil just to the right of the hole? If so, it's toast. The outer 2 or 3 windings are melted together, and maybe more up under the sheet metal that hides the rest of it.

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  • Crocket
    replied
    Bumping this up and including a pic from the back of the damaged area, going to try to get a better one but this is the best I have been able to do thus far.


    Any other suggestions on trouble shooting this thing?

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  • Crocket
    replied
    I narrowed down the buzzing, its coming from the gas solenoid. It only buzzes when the conductor is set to remote. I don't have the gas line run to the solenoid right now due to not having the fittings on hand to connect it to my tank and torch. Torch is connected straight to the reg and tank.

    I checked on all (AC, DCEP, and DCEN), no arc when set to local or remote. No scratch start and no HF arcing.

    Here are the pics of the board and the area near the terminals I spoke of.





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  • cruizer
    replied
    Not going to get HF without a remote. that HF transformer is on the base, it may be leaking, (sparking out the side of it to the frame)

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  • Crocket
    replied
    Originally posted by cruizer View Post
    The price of the board is pretty close to a new board, hmmm. Which Miller still has. When you put the local/remote switch to local, do you have output?"
    That struck me as odd also, $450 to swap out a few caps seemed a bit high rather than paying ~$600 for a whole new board. He couldn't find the invoice but said he would send it as soon as he ran across it, seems to be a stand up guy so I don't really believe he was lying about it.

    I tried it on both remote and local. No sparks at the points. IIRC when I tried to light off with a stick it was on local.

    FWIW it sounded like the buzzing was coming from the lower front of the machine but I'll check it again tonight to confirm it is one of the relays.

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  • cruizer
    replied
    What your likely hearing is CR2 relay buzzing away, or one of the timer relays. Nothing to do with the HF

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  • cruizer
    replied
    The price of the board is pretty close to a new board, hmmm. Which Miller still has. When you put the local/remote switch to local, do you have output?"

    Leave a comment:

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