Streaks can appear in images if the machine remains idle in Standby Mode for a long period of time.
Cause:
During Standby Mode, the hot roller and pressure roller are rotated at intervals in order to maintain the fusing temperature. This rotation can cause a small amount of friction between the pressure roller and cleaning web, causing tiny scratches on the surface of the pressure roller and particles to collect on the web. These minute particles on the surface of the web can transfer to the paper surface and cause black streaks in images.
Solution:
Changing these settings can shorten the service life of the cleaning web because the machine will occasionally take up the web during Standby Mode.
If the operator is experiencing this problem, advise them to switch the machine off rather than allowing it to stand idle for long periods in Standby Mode. If the machine is not being used at night, they should be advised to turn it off.