Image Shift - Konica Minolta AccurioPress C2070 Troubleshooting Manual

3.3.3. Image shift

(1) Symptom
Image is off-centered by 5mm to machine front direction. Timing, vertical zoom is extremely
out of alignment.
(2) Cause
(a) Shifting to machine front by 5mm
Paper dust etc attaches to the surface of centering sensor and the sensor mis-detects the
paper position. Consequently, the registration roller is moved by maximum distance and
the image is shifted to front side by 5mm.
Feed
direction
(b) Lead edge timing or CD-magnification is extremely out of standard
Paper dust attaches to the surface of centering sensor and the sensor mis-detects the paper
position. Consequently, the margin at the lead edge becomes wider.
Feed
direction
(3) Solution
Clean the centering sensor and lead edge detection sensor to remove the paper dust. Also
clean the registration roller, registration roller dust remover and all conveyance rollers. It is to
prevent the attachment of the paper dust to the sensors.
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Normal
Normal
- 185 -
5mm shift to machine front
Feed
direction
Image shift
Margin at lead edge becomes wider
Feed
direction
Image shift