Samsung MULTIXPRESS CLX-9251 Series Service Manual page 337

► Error Code
M1-4111
► Error message
Input System Failure #M1–4111 : Pull Tray 1 out and insert it.
► Symptom
The paper is not fed from tray1.
► Troubleshooting method
1) Remove tray1 and re-install it.
2) If the problem persists, turn the machine off then on.
3) Enter SVC mode. Execute pickup motor test.
(Diagnostics > Engine Diagnostics > Engine Test Routines > 100-0370)
4) If the pick up motor operation is abnormal, turn the machine off.
5) Remove the rear cover.
6) Check if the connection between pickup drive unit1 and main board is secure.
7) If the connection is OK, replace the pickup drive unit(JC93-00442A).
(Refer to 3.3.15. Pick-up Drive Unit)
8) If the problem persists, check the pickup unit1.
(Refer to 3.3.24. Pick-Up Unit and Sensor)
a) Check if the photo sensor in the pickup unit1 is defective.
b) If the sensor(0604–001393) is defective, replace it.
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4. Troubleshooting
4-152