Canon GP160DF Service Handbook page 21

2) Select 9.BOOK from service mode #6 SCANNER. Set 1 in 018.
3) Set the test chart you made on the copyboard glass with the image facing down.
4) Copy the image enlarged to 400%.
5) Measure the length of the leading and left edges of the copied image (see the figure
below).
6) Refer to Table 2-2. Work out the input value that corresponds to the measurement
taken in step 5.
7) Select 8. CCD from service mode #6 SCANNER. Enter the value worked out from
the leading edge data, 007, and the left edge data, 010 in step 6).
8) Select 9.BOOK from service mode #6 SCANNER. Set 0 in 018.
9) Exit service mode. Copy the image at 100%. Check that the copied image and the
original document positioning matches.
Leading edge
Left edge
10mm
10mm
Document
CARD
(Image facing down)
A5
B5
A5
A4
B5
B4
A4
A3
Figure 2-13
Leading edge
Left edge
Output image (400% enlarged copy)
Figure 2-14
CHAPTER 2 STANDARDS AND ADJUSTMENTS
CARD A4
A5 B5 A5 B5 A4 B4 A3
2-9