Canon iR C2880 series, Руководство по обслуживанию

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Chapter 2
2-66
5) Adjust the DADF angle by right-side hinge adjustment screw [1].
Loosen the fixing nut [2] before adjustment. Tighten it after adjustment.
F-2-193
F-2-194
* For A>B -> Rotate clockwise.
* For A<B -> Rotate counterclockwise.
6) Tighten all of the hinge fixing screw loosened in the step 3).
5. Reading Position Adjustment
1) Enter the service mode.
2) Select the screen from the service mode screen in the following order, to display the adjustment screen.
1. COPIER
2. FUNCTION
3. INSTALL
3) 3) Press STRD-POS to highlight.
4) 4) Press OK key.
The scanner starts scanning by pressing OK. Auto adjustment of scanning position is completed in a few seconds, OK is displayed.
If auto adjustment is failed and NG is displayed, perform the following steps.
1) Clean the white roller of DADF and the copyboard glass of the main unit, and perform auto adjustment again.
2) If it fails again, perform manual adjustment in the following step by the service mode.
COPYER > ADJUST > ADJ-XY > STRD-POS
The default is 30.
Modify the value and check the actual copy image, and determine the optimum value.
6. Reproduction Ratio Adjustment
MEMO:
DADF reproduction ratio adjustment is performed by comparing the stream reading copy image and pressing plate reading copy image (because the DADF is for
color machine). Comparison between stream reading copy image and original is performed at DADF for the previous monochrome machine, so perform adjustment
taking this difference into account. When reproduction ratio adjustment by comparing stream reading copy image and original is performed as in the case of mon-
ochrome DADF, the following problems may occur.
- ACS erroneous decision
- Black text enhancement erroneous decision
1) Set test chart to DADF, copy one set. This is to be copy B.
2) Set the test chart used in the step 1) to the copyboard glass of the main unit, copy one sheet. This is to be copy A.
3) Compare the image length in the feeding direction between copy A and copy B. Perform adjustment at the service mode if necessary.
Copy B image is short -> Decrease the value (Make the document stream reading speed lower)
Copy B image is long -> Increase the value (Make the document stream reading speed higher)
Adjustment unit 1=0.1%
4) Select the screen from the service mode screen in the following order.