Samsung MultiXpress K4 Series Service Manual page 331

5) If the problem persists after checking step 3~4, check the following :
a) Remove the DCF pick up unit1. Check if the sensor and actuator are assembled correctly.
b) When pushing the pickup lever, check if the pick up rollers are down.
c) Replace the DCF pick up unit1(JC93-00513A) or defective part.
6) Check the DCF feed motor.
a) Check if the DCF feed motor cable is connected correctly.
b) If the connection is OK, replace the DCF feed drive unit(JC93-00447A).
(Refer to 3.3.33.2 DCF Feed Motor)
7) Check the DCF pick up motor.
a) Check if the DCF pick up motor cable is connected correctly.
b) If the connection is OK, replace the DCF pick up drive unit(JC93-00442A).
(Refer to 3.3.33.3 DCF Pick Up Motor)
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4. Troubleshooting
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