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Treadmill controller

  Posted by Brian Attwood on Tuesday, April 17 2012

Hi,
I have a MC 2100 E rev B motor controller board manufactured by ICON 2003 in Thailand.
it is a 240 V Version.


I have found Q5 the 25 amp hi voltage insulated gate generation 4 bipolar Transistor shorted. (G4 PC40k)

this in turn has burnt out Q1, the 25 amp (SCR 8025L ) and R21 and seriously over heated R16.

I have replaced both with new resistors, I chose 1k ohm for R21 and 33o Ohm for R16.
I have powered up board with 240 VAC, and applied a 3volt supply to the LED input of
U4 ( TD 3062 opto-coupler triac driver ) to test.

well it all works on the bench, it powers up and charges the main filter cap.

before I reinstall into machine, and run this board at full capacity, I would like to know the correct values of both R 21 and R 16.

many thanks for your time



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