4. Troubleshooting► Error CodeM1–5211M1–5212► Error messagePaper is low in Tray 2. Load paper.Paper is empty in Tray 2. Load paper.► SymptomPaper in the tray is less than 10% of specification. / The photo sensor is defective.► Troubleshooting method1) Remove tray 2. Load paper in the tray, and insert the tray 2.2) If paper is loaded but error message has not disappeared, check the following :a) Turn the machine off. Open the Side Cover.b) Remove Pick-Up Unit2.(Refer to 3.3.24. Pick-Up Unit and Sensor)c) If the photo sensor is contaminated, clean it.d) If the photo sensor is defective, replace it(0604–001393).e) If the actuator is defective, replace it(JC66-03199A).4-155 Copyright© 1995-2013 SAMSUNG. All rights reserved.