Samsung ML-451 Series Service Manual page 153

► Error Code
H1–1252
H1–1352
H1–1452
H1–1552
► Error message
Paper Empty in Tray2
Paper Empty in Tray3
Paper Empty in Tray4
Paper Empty in Tray5
► Symptom
Paper in the optional cassette is empty.
► Troubleshooting method
1) Check if the paper in optional cassette is loaded. Load the paper.
2) Check if the empty actuator and empty sensor are assembled properly.
3) If the empty actuator is defective, replace it.
4) If the problem persists after replacing the empty actuator, replace the empty sensor.
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4. Alignment and Troubleshooting
4-52