Canon iR1200 Series, Service Manual

Page: 335 / 494

Chapter 12
12-9
as follows:
1) Make a copy of the test sheet in ADF mode on
paper of the same size in Direct.
2) Measure the length of L on the copy (i.e., obtained
by subtracting the leading edge margin from the
position of the line found 10 mm from the leading
edge; it must be 7 -/+ 0.5 mm).
F-12-14
3) Press the Additional Functions key and the # key to
start service mode.
4) Press the Left/Right Arrow key so that '#6
SCANNER' is indicated.
5) Press the OK key.
6) Press the Left/Right Arrow key so that '7: CCD' is
indicated.
7) Press the OK key.
8) Press the Left/Right Arrow key so that the 2nd row
of the LCD indicates '024'.
9) Enter an appropriate correction value using the
Left/Right Arrow key so that the length of L
measured in step 2) is 7 mm. (An increase of '1' will
increase the length of L by about 0.1 mm.)
10) Press the OK key.
11) Press the Stop key (to end SCANNER).
12) Make a copy of the test sheet in ADF mode on
paper of the same size in Direct; then, check to
make sure that the length of L on the copy is as
indicated.
13) End the work if the length of L is as indicated;
otherwise, start over with step 2).
12.5.3.5 Trailing Edge Read
End Position Adjustment
0006-3229
To adjust the trailing edge margin for ADF mode, go
through the following:
1) Make a copy of the test sheet on LGL paper in
Direct.
2) Measure the length "L" on the copy output.
(standard: 8 -/+ 0.5 mm)
F-12-15
3) Press the Additional Functions key and the # key to
start service mode.
4) Press the Left/Right arrow key so that '#6
SCANNER' is indicated.
5) Press the OK key.
6) Press the Left/Right arrow key so that '7: CCD' is
indicated.
7) Press the OK key.
8) Press the Left/Right arrow keys so that the 2nd row
of the LCD indicates '025:'.
9) Enter a correction value using the Left /Right key
so that the length of "L" measured in step 2) is 8 mm
(trailing edge margin of 2 mm; an increase by '1'
will decrease the length of "L" by about 0.1 mm).
10) Press the OK key.
11) Press the Stop key (to leave 'SCANNER').
12) Make a copy of the Test Sheet in Direct on LGL
paper and in ADF mode. Then, check to make use
that the length of "L" on the copy is as indicated.
13) If it is as indicated, end the work. Otherwise, start
over with step 2).
Copy of the test sheet
(feeding direction)
Leading edge margin
L
Copy of the test sheet
(feeding direction)
Trailing edge margin
L