Developing Screw Mark - Konica Minolta AccurioPress C2070 Troubleshooting Manual

1.2.11. Developing screw mark (at low speed)
Machine rear side
Rear side
Feed
Direction
Machine front side
(1) Symptom
Slant white lines in screw pitch occurs at the machine rear side, front side or whole page.
(2) Cause

After continuous low coverage printing

After long term holiday like one week

An extreme change in ambient temperature and humidity. For example, from low
temperature and low humidity to high temperature and high humidity

Dirt in charging unit
Machine is not levelled and tilted. Machine front side is higher than machine rear side.
(3) Solution
Clarify the cause
(a) In the case that slant white lines in screw pitch occur
Check the dirt of charging unit and developing unit. → Pattern 1
whole page.
(b) In the case the grid in charging unit is heavily dirty by toner, replace charging unit
→ Refer to Pattern1 procedure_2_ note1.
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Machine rear side
Machine front side
only at the machine rear side or in the