Samsung CLX-8540ND Service Manual page 264

● Code : 04-000
04-003
● Symptom : Black LSU Polygon Motor does not operate properly. (04-000)
Yellow LSU Polygon Motor does not operate properly. (04-003)
● Possible Cause:
1. Harness is defective, Connector is not connected properly.
2. LSU is defective.
3. Engine Board is defective.
● Troubleshooting method :
1. Check the following.
-. Check if the Engine Board Harness is defective.
-. Check if the harness is connected to the 'LSU P-Motor' Connector on Engine Board properly.
-. Check if the joint ①,② harness are connected properly.
Joint ①
2. Enter the EDC mode. Execute the LSU Motor Run1. If there is any problem, replace the LSU.
[Refer to 3.2.2 General Disassembly / LSU ]
3. If the problem persists after replacing the LSU, replace the Engine Board.
Troubleshooting
● Error message : LSU error: #04-000. Please turn off then on.
LSU error: #04-003. Please turn off then on.
'LSU P-MOTOR'
(CN21, 10pin)
Joint ②
4-102