Canon PC1000s Service Manual page 288

CHAPTER 7 TROUBLESHOOTING
1.2.4.2
Leading Edge Read Start Position Adjustment
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. (See
1.2.2 of Chapter 7.)
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
a
0.5 mm).
Leading ydge mar- gin
(feeding direction)
A
...+
copy of the test sheet
I I
3) Press the Additional Functions key and the # key to start service mode.
4) Press the IeftIRight Arrow key so that
'#6 SCANNER' is indicated.
5) Press the Set key.
6) Press the LeftRight Arrow key so that '7: CCD' is indicated.
7) Press the Set key.
8) Press the LeftRight Arrow key so that the 2nd row of the
LCD
indicates '023:'.
9) Enter an appropriate correction value using the LeftRight 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).
7-6
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PClWOs4rnageCLASS
REV. 1 AUG.
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