Service manual

Chapter 12
12-1
12.1 Image Adjustments
12.1.1 Leading Edge Read Start Position Adjustment
0006-4201
Adjust the leading edge read start position for book mode as follows:
1) Make a copy of the test sheet in book mode on paper of the same size in Direct.
2) Measure the length of L on the copy (i.e., the length obtained by subtracting the leading edge margin from the line
found 10 mm from the leading edge; it must be 7 +/- 0.5 mm).
F-12-1
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 Set key.
6) Press the Left/Right Arrow key so that '7: CCD' is indicated.
7) Press the Set key.
8) Press the Left/Right Arrow key so that the 2nd row of the LCD indicates '023:'.
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 by '1' will decrease the length of L by about 0.1 mm.)
10) Press the Set key.
11) Press the Stop key (to end SCANNER).
12) Make a copy of the test sheet in book mode on paper of the same size in Direct; then, check to make sure that the
length of L is as indicated.
13) End the work if the length of L is as indicated; otherwise, start over with step 2).
12.1.2 Left/Right Edge Read Start Position Adjustment
0006-4202
Adjust the left/right edge read start position for book mode as follows:
1) If LTR paper is available, prepare a test sheet using LTR paper.
If no LTR paper is available, cut a larger sheet of paper so that its width is 216 mm; then, shown in prepare a test
sheet, making sure that the width is 216 mm; as for its length, make sure that it fits the copyboard glass.
2) Make a copy of the sheet in book mode on paper of the same size to a reduction ratio of 80%.
3) Measure the length of b-a of the copy, and check to make sure that it is as indicated. (It must be 0 +/- 0.4 mm.)
Copy of the test sheet
(feeding direction)
Leading edge margin
L