Leading Edge Read Start Position Adjustment - Canon iR1200 Series Service Manual

CHAPTER 7 TROUBLESHOOTING

1.3.4.4 Leading Edge Read Start Position Adjustment

Adjust the leading edge start position for ADF mode as follows:
1) Make a copy of the test sheet in ADF mode on paper of the same size in Direct. (See
1.2.2 of Chapter 7.)
2) Measure the length of L on the copy (i.e., obtained by subtracting the leading edge mar-
gin from the position of the line found 10 mm from the leading edge; it must be 7 ± 0.5
mm).
(feeding direction)
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).
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COPYRIGHT © 2002 CANON INC.
Leading edge margin
L
Copy of the test sheet
F07-103-07
2000 2000 2000 2000 CANON iR1200/iR1300 Series REV. 0 AUG. 2002