Uneven Density between the Left and Right Sides (at 40 mm (1.6 inches) Intervals)
Uneven density between the left and right sides occurs every 40 mm (1.6 inches).
Cause:
This is caused by the bias of the charged electric potential between the front and back.
This is prone to occur when printing on a wintery morning after leaving the machine idle.
Solution:
Print a halftone image with a density of approximately 50% and check if there is a difference in density between the left and right sides.
If the uneven density occurs every 40 mm (1.6 inches), use the following solutions.
In the [Machine: Maintenance] group on the [Operator Adjust.] menu, execute 0501-01: [Execute Process Adjustment].
Normally, the process control is automatically executed first thing in the morning, but in a low temperature and low humidity environment, the adjustment of the charged AC bias may not be sufficient by a single process control. In such a case, execute process adjustment manually.
If the problem persists, increase the room temperature (to 20°C or higher) and leave the machine idle for 30 minutes or longer.
Increasing the room temperature eases the increase in resistance of the charge roller and reduces the lack of charge, thereby reducing the potential difference.
If the problem still persists, turn the anti-condensation heater on.
Turn the anti-condensation heater on to keep the temperature inside the machine high even after the power is turned off.
If the problem still persists, contact your service representative.