First of all hello to everyone !
I just started electronics a short time ago as a hobby and now got into treadmill repairs.
The main issue i have posted now is that i have 4 MC2100 controller boards at home ( 3 form domyos and one from a Proform) which are identical.
To start from the beginning...when i received this boards all of them had the IGBTs shorted.
I proceeded to replace them with same component.
I also have a treadmill for test with 2 dc motors.Both motors test 0.9 ohms between black and red leads ( dont know if that is ok )
When powering up the boards for test the following happend on all of them:
-upper display powered up and board LED got solid red !
-hit the start button , LED start blinking fast and the motors started moving
-the motor starts aggressively at high speed ( the upper control panel just shows speed 2 ) demanding 20 Amps at start-up then the speed goes down in 2 seconds and getting stabilized getting 8 amps !
-after 1 min at running at the start speed, without load, the IGBT gets very hot and shorts along with IGBT driver
I have replaced again the IGBT , IBGT driver , THYSTOR , Bridge rectifier , some smd resistances near the IGBT driver.
Did the test again.same results on all the boards with both motors.
Any ideas?
Thank you in advance !
I just started electronics a short time ago as a hobby and now got into treadmill repairs.
The main issue i have posted now is that i have 4 MC2100 controller boards at home ( 3 form domyos and one from a Proform) which are identical.
To start from the beginning...when i received this boards all of them had the IGBTs shorted.
I proceeded to replace them with same component.
I also have a treadmill for test with 2 dc motors.Both motors test 0.9 ohms between black and red leads ( dont know if that is ok )
When powering up the boards for test the following happend on all of them:
-upper display powered up and board LED got solid red !
-hit the start button , LED start blinking fast and the motors started moving
-the motor starts aggressively at high speed ( the upper control panel just shows speed 2 ) demanding 20 Amps at start-up then the speed goes down in 2 seconds and getting stabilized getting 8 amps !
-after 1 min at running at the start speed, without load, the IGBT gets very hot and shorts along with IGBT driver
I have replaced again the IGBT , IBGT driver , THYSTOR , Bridge rectifier , some smd resistances near the IGBT driver.
Did the test again.same results on all the boards with both motors.
Any ideas?
Thank you in advance !