Samsung SCX3400

7. Uneven Density

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

Check and cause	Solution
• The pressure force on the left and right springs of the transfer roller is not even. • The springs are damaged. • The transfer roller is improperly installed.	1) Remove the transfer roller. 2) Check if the transfer roller has any wrong part. 3) Replace the transfer roller.
The toner level is not even on the toner cartridge roller due to the bad blade.	Replace the toner cartridge.

8. Background

• Description : Light dark background appears in whole area of the printing.

Check and cause	Solution
Does recycle paper be used?	Use the proper papers.
The life of the toner cartridge has been expired	Replace the toner cartridge.
The output from the HVPS/SMPS is abnormal.	Replace the HVPS/SMPS board.

9. Ghost

• Description : Ghost occurs.

Check and cause	Solution
The high voltage terminal is contaminated.	Clean the high voltage terminals.
The life of the toner cartridge has been expired	Replace the toner cartridge.
The life of the transfer roller has been expired.	Replace the transfer roller.