Samsung CLX-8540ND Service Manual page 310

● Code : 21-004
● Symptom :
There are enough papers in tray1 but error message is displayed.
● Possible Cause:
1. Tray1 Paper Low Sensor harness is not connected properly.
2. Tray1 Paper Low Sensor is defective.
● Troubleshooting method :
1. Check if the Harness is defective.
Check if the connector is connected properly.
2. Check the following.
-. Check if the Tray1 Paper Low Sensor is assembled properly.
-. Check if the Tray1 Paper Low Sensor harness is connected properly.
-. Enter the EDC mode. Execute the Tray1 Paper Low Sensor test.
(EDC Mode Test Routines
check Stop)
Troubleshooting
● Error message : Paper is low in tray 1. Load paper
Copier Engine/DADF Test Routine
4-148
102-060 Start Operation