Minolta copier di-450 code : c-143e - Minolta Office Equipment & Supplies

The correct error code is C 143E - EDH malfunctions.Please reset the malfunctuion code to open and closed the front door,or turn OFF wait 5 sec. and turn ON the power switch.If the problem persist change the image processing board.
Pick up motor malfunction
Whwn the document handling tray goes to up the pick up raised position sensor is not unblocked when the motor started turning forward.Whwn thw DHT goes down the pick up lower position sensor is not unblocked after the motors started turning backward.
During ascent motion check :
1.Foreign matter on pick up motor gear
2.Pick up motor operatio.The voltage across PJ11A 1 of main control board and GND is 0V when the motor is deenergized and 24 V when the motor is energized when the DHT is raised after the malfunction reset.
3.Pick up raised position sensor operation.
Change the motor,sensor or main control board.
During descent motion
1.Check the pick up motor gear.
2.Check the pick up motor operation
3Check the pick up lower position sensor operation.