Question posted by jcastilloabarca on June 17th, 2010
E68 Error
Where I can get the diagram what include the complete electric conection, I have one but not show the heater. Thanks.
Current Answers
Answer #1: Posted by Anonymous-16528 on June 30th, 2010 9:09 AM
Anonymous-16528
Member since:
June 30th, 2010 Points: 1,130
Member since:
June 30th, 2010 Points: 1,130
Same here two days ago. No any button is really stuck and E68 failure keeps pop-up. It took me one day to figure out the issue. It is its design issue. When it needs to detect button input, it uses internal resistor inside ULN2004A as its pull-down resistor. Specification of ULN2004A says it is 10.5K. But in my dryer, actual value is 20.5K. I believe its software also sets up internal pull-up resistor of the micro controller pin. So it makes micro controller always reads high voltage -- same as button pressed. One side of the button is 3.3K pull-up resistor to 5V. What you need to do is to put one 10K resistor pull-down to GND on the other side of the button.
My dryer is back to work after one 10K pull-down resistor is added.
$185 ++ saved.
Hope it helps others.
My dryer is back to work after one 10K pull-down resistor is added.
$185 ++ saved.
Hope it helps others.
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