• Re: Dewalt DW423 - Bypass Speed Control - Convert to Single Speed

    From Sean@21:1/5 to All on Sun May 14 21:02:34 2023
    My de Walt sander has one white wire wired into a block from the main blue and prowl power cord and the other side is a black and white with one going to the switch . How would I do away with the speed controller. Thanks

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  • From snmhaines@21:1/5 to All on Sun Oct 13 00:00:04 2024
    I recently had the same problem with my DW423 and found what the fault was. Just next to the speed-control potentiometer there is a power transistor which is connected to both the live and neutral inputs to the control board (black rectangular component
    about 1/4" square). I lifted it slightly and it fell off, so the adhesive that was securing it to the board had failed and the three terminal pins were fractured - presumably due to vibration over the years. I re-secured it using a spot of hot glue,
    then soldered the terminals back together; now it is back to full working order. I cannot say thst this is the only cause of the problem, but consistent mass production does tend to produce consistent faults.
    ..Steven

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