Konica Minolta 0902, Service Manual

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Chapter 3 Troubleshooting
3-41
3.4.4 Horizontal Streak in Part of the Image
Phenomenon: Streak appears in part of the image
Phenomenon: Streak reaching sideways from a shielding material such as lead
Phenomenon: Density jump occur at about 30 mm from the top of image.
Phenomenon: Cyclic slanted streaks
Important
Always perform the image size adjustment, the image position adjustment, the unevenness
calibration, and the sensitivity calibration after replacing the optical unit.
No. Cause
1 External force was applied during the read.
No. Response
1 Perform read again making sure no shock is applied
to the equipment.
No. Cause
1 It could happen when there are shielding material is
located at the white area.
No. Response
1
•
Cause is so limited, ask the user to respond by
methods such as moving the shielding material
away from the object as much as possible or
decrease the exposure field.
•
Communicate the contact if it recur.
No. Cause
1 Plate is in contact with the detach detection roller
due to warp or detach of the plate.
No. Response
1
•
Return the plate with the warp or detach to the
contact.
•
Adjust the detach detection roller when it occurs
in multiple plates.
No. Cause Response
1 There is a possibility that light is entering
from outside. Confirm by reading solid image after reattaching the
exteriors, or darkening the room.