Canon MF4690 Service Manual - Page 158
<033Vertical scan magnification correction>
UPC - 013803076820
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Chapter 14 No. 026: 027: - 030: 031: 032: 033: 034: 035: - 036: 037: - 040: 041: 042: - 046: 047: 048: 049: - 053: 054: 055: - 350: Function Default Distance from the standby position of CIS to the 10 shading start point. Not used Vertical scan start position adjustment 0 Not used Vertical scan magnification correction 32 Not used Reader motor speed adjustment 423 Not used Vertical scan start position adjustment (scanning 0 on ADF) Not used Vertical scan magnification correction (scanning 32 on ADF) Horizontal scan magnification correction 32 (scanning on ADF) Not used Pickup motor speed correction (when the ADF is 32 used) Not used Setting range 6-48 0-70 0-64 0-70 0-64 0-64 0-64 Unit one unit=0.1mm one unit=0.1mm one unit=0.1% one unit=0.1mm one unit=0.1% one unit=0.1% one unit=0.1% If any operation error occurs after changing the setting value, change the setting value to the original one. 14.6.2 0016-2075 Adjust the position at which vertical scanning of a book starts. The larger the adjustment value, the narrower the left-side margin of the image becomes. 14.6.3 0016-2077 Correct the magnification of vertical scanning of a book. The larger the adjustment value, the more the image stretches in the vertical scanning direction. 14.6.4 0016-2078 Though no market adjustment work needs to be carried out, enter factory defaults at image processor PCB replacement. 14.6.5 0016-2079 Adjust the position at which vertical scanning of a document fed from the ADF starts. The larger the adjustment value, the narrower the left-side margin of the image becomes. 14.6.6 0016-2081 Correct the magnification of vertical scanning of a document fed from the ADF. The larger the adjustment value, the more the image stretches in the vertical scanning direction. 14.6.7 0016-2082 Correct the magnification of horizontal scanning of a document fed from the ADF. The smaller the adjustment value, the more the image stretches in the horizontal scanning direction. This menu is used to adjust the ADF feed motor speed. If you changed the adjustment value in this mode, the adjustment value selected for SCAN NUMERIC>54 must also be incremented/decremented by the same amount. Do not change the adjustment value extremely. 14-18