Canon multipass c3000 Service Manual (en)

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3.2 Vertical Alignment Correction
a) Overview
Vertical alignment during bi-directional printing can be corrected by adjusting the print
starting position.  No tools are required for this adjustment.
b) Printing the test pattern
Follow the procedure below to print out the test pattern.
The test pattern can be printed only when Black BJ Cartridge (BC-20) and
Color BJ Cartridge (BC-21) are used. Photo Color BJ Cartridge (BC-22) cannot
be used.
c) How to read the Test pattern
As shown in 
Fig. 3-5
, the test pattern shows the SHQ, SHQ2 (Not used), HQ (normal mode),
HS (economy mode) and uni-direction printing condition from the top.  The respective
vertical lines for HQ and HS can be moved left or right on the second row (of three rows).
As shown in 
Fig. 3-6
, adjust so that the vertical lines in the middle are correctly aligned.
Chapter 3: Maintenance & Service
3-7
FUNCTION
#
Printing the Test Pattern.
START/COPY
A PATTERN PRINT
START/COPY
Figure 3-4 Printing the Test Pattern
SHQ
(Bi-directional printing)
SHQ2
(Not used)
Uni-directional printing
HQ
(Bi-directional printing)
HS
(Bi-directional printing)
Figure 3-5 Test Pattern Sample
NOTE