Canon iR1200 Series Service Manual page 328

Chapter 12
4) Press the Additional Functions key and the # key to start service mode.
5) Press the Left/Right Arrow key so that '#6 SCANNER' is indicated.
6) Press the OK key.
7) Press the Left/Right Arrow key so that '7: CCD' is indicated.
8) Press the OK key.
9) Press the Left/Right Arrow key so that the 2nd row of the LCD indicates '021:'.
10) Enter an appropriate correction value on the keypad so that the length of b-a measured
in step 2) is as indicated. (An increase by '1' will decrease the length of b by about 0.03
mm while increasing the length of a by about 0.03 mm.)
11) Press the OK key.
12) Press the Stop key (to end SCANNER).
13) Make a copy of the test sheet in book mode on paper of the same size; then, check to
make sure that the length of L on the copy is as indicated.
14) End the work if the length of L is as indicated; otherwise, start over with step 2).
12-2
a
(feeding direction)
b
Copy of the test sheet
F-12-2