Dadf-N1: Image Stretch Or Shrinkage (In Sub Scanning Direction) Occurs In Stream Reading Upon Installation; Output Image Is Scaled Down In Original Feed Direction Because Cis Read Position Is Shifted: After Replacing Paper Pick-Up Assembly For Dadf-N1 - Canon iR3570 Service Manual

Chapter 14
F-14-14
Field Remedy
When a faulty image like the above has occurred, replace the laser scanner assembly with a new one.
Note: After replacing the laser scanner assembly, never fail to input the "Delay value" on the label attached to the old laser scanner assembly into the following
service mode:
[Service mode > COPIER > ADJUST > LASER > LA-DELAY]
FM2-0276 Laser Scanner Assembly (for iR2270/2870 series)
FM2-0334 Laser Scanner Assembly (for iR3570/4570 series)

14.2.1.7.2 DADF-N1: Image stretch or shrinkage (in sub scanning direction) occurs in stream reading upon installation

iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 / / / / /
[ Case in the field ]
Description
In the field, image stretch or shrinkage occurred depending on the types of paper used. This was because the service mode item "LA-SPEED" (adjustment of
original feeding speed in stream reading) was not executed upon installation.
Field Remedy
When the symptom has occurred, follow the procedure below.
1. Place the Test Chart in the DADF-N1 and make a copy. Refer to the output as "Copy A."
2. Compare the Test Chart and Copy A in terms of the length of the image in feed direction.
3. In service mode [FEEDER > ADJUST > LA-SPEED], adjust the setting as follows. (Unit of adjustments: 0.1%)
- As a result of the comparison in Step2, if the image of Copy A is longer, increase the setting to shrink the image.
- As a result of the comparison in Step2, if the image of Copy A is shorter, decrease the setting to stretch the image.
14.2.1.7.3 Output image is scaled down in original feed direction because CIS read position is shifted: After replacing paper pick-up
assembly for DADF-N1
iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 / / / / / / /
[ Case in the field ]
Description
In the field, the CIS read position was shifted after replacement of the paper pick-up assembly for the DADF-N1, the output image was scaled down in the
original feed direction. When the symptom has occurred, perform the following field remedy.
Field Remedy
1. CIS read position adjustment
Service mode > COPIER > Function > INSTALL > STRD-POS > OK
2. Magnification adjustment
In Service mode [FEEDER > Adjust], decrease the setting value for [LA-SPEED]. (Adjustable range: -30 to 30).
Note: Increasing this setting value will increase the original feed speed, thus scaling down the output image. Conversely, decreasing the value will decrease
the original feed speed, thus scaling up the output image.
14-18
0010-6550
0011-6435