Samsung ProXpress M453x series Service Manual page 159

► Error Code
H1-1451
H1-1452
H1-1454
► Error message
Paper is low in Tray 4. Load paper.
Paper is empty in tray 4. Load paper.
► Symptom
Paper in the tray4 is less than 10% of specification. / The photo sensor is defective.
► Troubleshooting method
1) Remove tray4. Load the paper in tray4.
2) If paper is loaded but error message has not disappeared, check the following.
a) Check if the paper empty sensor is contaminated. If so, clean it.
b) If the paper empty sensor(0604-001325) is defective, replace it.
c) If the empty actuator(JC66–02613A) is defective, replace it.
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4. Troubleshooting
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