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I have a miller syncrowave 250dx and have lost all amprage control with the foot pedel It has a new main board that's not the problem I have tested all the 14pin plug and the foot pedal

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  • John Tyler Jan 04, 2017

    I just hooked multimeter to it and this what I've found
    Pin 1 volt 15
    Pin 2 volts 15
    Pin 3 volts 10 till half pedel then drops near 1.5 v ohms 1k no pedel 185 full pedel
    Pin 4 ground
    Pin 5 volts 0 no pedel and 1.5 full ohms 1 no pedal* 185 full
    Pin 6 volts full pedel 1.6 0 no pedel ohm 12k
    Pin 7 ground
    Pin 8 volts 0



    Manual says
    Pin 1 +15vdc output
    Pin 2 contactor +15v external output closed
    Pin 3 remote amperage control reference +10vdc
    Pin 4 ground reference for remote amp control
    Pin 5 remote amp control input 0 to +10vdc variable
    Pin 6 output current feedback +1vdc per 100 amp weld output
    Pin 7 ground reference for 24vdc
    Pin 8 output voltage feedback +1vdc per 10v weld output

    I have the technical manual if anyone can help me or tell me where test next be greatly appreciated

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