Canon multipass c3000 Service Manual (en)

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d) Correction procedure
The misaligned vertical lines in the middle, shown in 
Fig. 3-7
, are described below.
(1) Check the correction direction for the 2nd line, and check the dot count.  (In the
example, a 2-dot correction to the right is necessary.)
(2) Determine the dot count required for the correction.
In SHQ, the dot count is roughly 4.55 times. (E.g., 2 
×
4.55 = 9)
In HQ, the dot count is roughly 2.86 times.
(E.g., 2 
×
2.86 = 6)
In HS, the dot count is 2 times.
(E.g., 2 
×
2 = 4)
(3) As shown in 
Fig. 3-8
, make the correction for all print mode.  (The flowchart shows the
procedure for making a 2-dot correction to the right for the all print mode, respectively.
The actual display may look different from the figure.)
(4) After making the correction, print out the test pattern.  If there is any misalignment, do
the correction again.
All registration defaults are 0.
SHQ2 mode is not used in this model.
Part 1: Facsimile
3-8
Center
0 dot
Misalignment Direction : "LEFT"
Misalignment Direction : "RIGHT"
Printout of 1st line
Printout of 2nd line
Printout of 3rd line
1 dot
2 dot
1 dot
2 dot
Figure 3-6 Correct Test Pattern
Example: A 2-dot correction on the right is necessary
Center
Printout of 1st line
Printout of 2nd line
Printout of 3rd line
Figure 3-7 Sample Test Pattern with Vertical Misalignment
NOTE