Technical information

3. Adjusting the Scanner Driver Cable
Move the No. 1 mirror mount to the home (start)
position, pull the cable using a spring gauge (A in
Figure 4-25), and turn screw A so that the reading of
the gauge is about 1 .O fo.05 kg.
4. Adjusting the Mirror Position
(optical length between Mo. 1 and 2
Mirrors)
Adjust the relative position of the mirrors when
the mirror drive cable has been re-routed.
Theposition can be adjusted by moving thefixing
used for the No. 1 mirror mount; loosen the hex
scanner pulley
No. 1 No. 2 and
mirror 3 mirror
mount mounts
screw.
Note:
i. The cable tends to become slack as cop-
ies are made, necessitating adjustment of
its tension.
ii. If the optical distance between the No. 1
and 2 mirrors is not correct, the horizontal
reproduction ratio will not be correct and,
at the same time, images will be out of
focus.
Figure 4-25 (viewed from above)
1) Draw lines on copy paper (A4, A3, LTR, or 11” X
17”); 1 cm/0.4 inch from each end as shown in
Figure 4-26.
7 pi cml0.4 in
7 i-lcml0.4in
Figure 4-26
2) Use the paper marked with lines as the docu-
ment, and make a copy; A.
3) Place a blank sheet of paper on the copyboard,
and feed the paper marked with lines in the
manual mode: B.
4-l 0 COPYRIGHT 0 1992 CANON INC.
CANON NP2l20/2@20 RN.1 JAN. 1592 PAINTED IN JAPAN IIMPAIME AU JAPONI