Samsung SCX3400FW
Troubleshooting. Image quality 1
1. Vertical Black Line and Band
• Description : Straight thin black vertical line occurs in the printed image.
Check and cause | Solution |
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• Damaged develop roller in the toner cartridge. Deformed Doctor-blade or cleaning-blade. | Replace the toner cartridge. |
• Scratched surface of the charge roller in the toner cartridge | Replace the toner cartridge. |
Partly depression or deformation on the surface of the transfer roller. | Replace the transfer roller. |
2. Vertical White Line, Band
• Description : White vertical voids occurs in the printed image.
Check and cause | Solution |
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Foreign matter stucks onto the window of internal lenses of LSU mirror. | Clean the LSU window with recommended cleaner (IPA). Clean the window with a clean cotton swab. |
The life of the toner cartridge has been expired | Replace the toner cartridge. |
Some foreign substances are on the window of the toner cartridge frame. | Remove the foreign matter of the exposure window. |
If the fuser is defective, voids occur periodically at the top of a black image. | Open the rear cover. Reinstall the fuser unit. |
3. Horizontal Black Band
• Description : Dark of blurry horizontal stripes occur in the printing periodically.
Check and cause | Solution |
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Bad contacts of the voltage terminals to toner cartridge. | Clean each voltage terminal of the Charge, Developing, toner cartridge and Transfer roller. (remove the toner particles and paper particles) |
The rollers of developer may be stained. • OPC Drum = 75.4 mm • Charge Roller = 37.7 mm • Developing Roller = 44.2 mm |
Replace the toner cartridge. |