Samsung MultiXpress X4 Series Service Manual page 500

4. Troubleshooting
4.7.11. Blank copy
A. Typical faulty images
B. Troubleshooting procedure
Step Cause
1 LSU operation error
2 All connectors on HVPS board are connected correctly.
3 Check if the related parts are broken.
4 Check if the connection between scan joint board and
main board is OK.
4-250
Action
Check LSU connector for proper connection.
Reconnect.
Replace the HVPS board or Main board or LSU.
Reconnect the harness.
If the connection is OK, replace the main board.
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