Canon MultiPASS C755 Service Manual - Page 58

When Adjustment of the Print Head Position is Required

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MultiPASS C755 Chapter 3: Maintenance & Service 3.2 When Adjustment of the Print Head Position is Required a) Overview When replacing the print heads, the point of ink ejection may be off, preventing clean characters, depending on the state in which BJ cartridge is installed. In order to eliminate this drift, it is necessary to adjust the head position after attaching the BJ cartridge. Set 2 or more sheets of normal paper sized A4 or LTR on the Auto Sheet Feeder, and perform head position adjustment following the steps in Fig. 3-4. (B1) -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 +7 (B2) -7 -6 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 +6 +7 (B1) -1 0 +1 (B2) -1 0 +1 Figure 3-3 Print Position Adjustment Patterns Be sure to set A4 or LTR-sized paper in the ASF before printing the head position adjustment pattern. Using printing paper smaller than the printing area of the data when performing the head position adjustment print will contaminate the platen with ink. 3-7

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3-7
MultiPASS C755
Chapter 3: Maintenance & Service
3.2 When Adjustment of the Print Head Position is Required
a) Overview
When replacing the print heads, the point of ink ejection may be off, preventing clean characters,
depending on the state in which BJ cartridge is installed. In order to eliminate this drift, it is necessary to
adjust the head position after attaching the BJ cartridge. Set 2 or more sheets of normal paper sized A4 or
LTR on the Auto Sheet Feeder, and perform head position adjustment following the steps in Fig. 3-4.
Figure 3-3 Print Position Adjustment Patterns
Be sure to set A4 or LTR-sized paper in the ASF before printing the head position
adjustment pattern. Using printing paper smaller than the printing area of the data when
performing the head position adjustment print will contaminate the platen with ink.
(B1)
-6
-5
-4
-3
-2
-1
-1
+1
0
-1
+1
0
0
+1
+2
+3
+4
+5
+6
+7
-7
(B2)
(B1)
(B2)
-6
-5
-4
-3
-2
-1
0
+1
+2
+3
+4
+5
+6
+7
-7