Samsung SCX3400
Troubleshooting. Image quality 2
4. Black and White spot
• Description : Dark or blurry black spots occur periodically in the printing.
| Check and cause | Solution |
|---|---|
| If dark or blurry black spots occur periodically, the rollers in the toner cartridge may be contaminated with foreign matte or paper particles. (Charge roller : 37.7 mm interval / OPC drum : 75.4 mm interval) | Clean each voltage terminal of the Charge, Developing, toner cartridge and Transfer roller. (remove the toner particles and paper particles) |
| If faded areas or voids occur in a black image at intervals of 75.4 mm, the OPC drum surface is damaged. | Replace the toner cartridge. |
| If a black image is partially broken, the transfer voltage is abnormal or the transfer roller’s life has expired. | • If the transfer roller’s life is expired, replace it. • Clean the inside of the set against the paper particles and foreign matter in order not to cause the trouble. |
5. Light image
• Description : The printed image is light, with no ghost.
| Check and cause | Solution |
|---|---|
| Toner cartridge life is expired. | Replace the toner cartridge. |
| HVPS/SMPS terminal is contaminated. | Clean the contaminated terminal. |
| The output from the HVPS/SMPS is abnormal. | Replace the HVPS/SMPS board. |
6. Dark or Black page
• Description : The printed image is dark or black.
| Check and cause | Solution |
|---|---|
| Check if the high voltage terminal is contaminated. | Clean the high voltage terminal. |
| The charging roller is defective. | Replace the toner cartridge. |
| The output from the HVPS/SMPS is abnormal. | Replace the HVPS/SMPS board. |