Samsung SLC480FN

4. Dark or Black image

• Description : The black page is printed out.

Cause and Check Point	Solution
No charging voltage in the HVPS.	Check the connecting state between the Main PBA and HVPS. Reconnect the harness.
Poor contact between toner cartridge and set contacts.	Clean the contacts as necessary. Replace any deformed or damaged contacts.
HVPS1 is defective.	Replace the HVPS1.

5. Blank Page

• Description : Blank page is printed.

Cause and Check Point	Solution
Bad contacts from OPC drum and/or toner cartridge to ground.	Check the terminal of Ground-OPC.
Not working the LSU.	Check the connector of LSU.
Not working the developing bias voltage on HVPS.	Replace the defective HVPS. NOTE HVPS output information - If the output for MHV, DEV is abnormal, replace the HVPS1 (JC44–00242A). - If the output for 1THV, 2THV is abnormal, replace the HVPS2 (JC44–00243A).

6. Uneven Density

• Description : Print Density is uneven between left and right.

Cause and Check Point	Solution
The rear cover is not closed correctly.	Open and remove the rear cover correctly.
The life of the Toner Cartridge has expired.	Replace the corresponding toner cartridge.
The pressure force in the left and right springs of the ITB unit is not even.	Replace the ITB Unit