Canon MultiPASS C755 Service Manual - Page 60

When the Carriage Belt Tension Needs Adjustment

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MultiPASS C755 Chapter 3: Maintenance & Service 3.3 When the Carriage Belt Tension Needs Adjustment When tension on the carriage belt has been loosened, for example, to remove the carriage, the carriage belt tension needs to be adjusted. Use the tension spring tool (QY9-0043) when fixing the pulley assembly before tightening the screws. Remove the tension spring after the screws are fixed. Tension Spring Fixing Screws Idler Pulley Figure 3-5 Carriage Belt Tension Adjustment 3.4 When the ASF Gear Initial Position Adjustment is Required When installing the ASF, the ASF gear initial position adjustment must be executed to match phase with the purge unit's ASF drive gear, which is the transmission source of the ASF drive, and the ASF gear. Preparing for the Adjustment: Make sure that the purge unit's ASF drive gear is in the initial position when assembling. If it is in the initial position, assemble the printer with the ASF unit removed, and Procedures 1) through 3) are not necessary. If it is not in the initial position, follow the adjustment procedures described below. 1) Manually rotate the ASF drive gear slowly in the direction of the arrow to move it to the initial position. 2) Stop rotating the gear until a click can be felt (where the rotation stops). (To confirm the position, gently move the ASF drive gear vertically with your fingers. Make sure that the gear is at the position where click can be felt.) 3) If the gear has passed the click position, rotate the gear in the arrow's direction to return to the correct position. ASF Drive Gear Figure 3-6 ASF Drive Gear Initial Position 3-9

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3-9
MultiPASS C755
Chapter 3: Maintenance & Service
3.3 When the Carriage Belt Tension Needs Adjustment
When tension on the carriage belt has been loosened, for example, to remove the carriage, the carriage belt
tension needs to be adjusted.
Use the tension spring tool (QY9-0043) when fixing the pulley assembly before tightening the screws.
Remove the tension spring after the screws are fixed.
Figure 3-5 Carriage Belt Tension Adjustment
Figure 3-6 ASF Drive Gear Initial Position
3.4 When the ASF Gear Initial Position Adjustment is Required
When installing the ASF, the ASF gear initial position adjustment must be executed to match phase with
the purge unit's ASF drive gear, which is the transmission source of the ASF drive, and the ASF gear.
Preparing for the Adjustment:
Make sure that the purge unit's ASF drive gear is in the initial position when assembling. If it is in the
initial position, assemble the printer with the ASF unit removed, and Procedures 1) through 3) are not
necessary. If it is not in the initial position, follow the adjustment procedures described below.
1) Manually rotate the ASF drive gear slowly in the direction of the arrow to move it to the initial position.
2) Stop rotating the gear until a click can be felt (where the rotation stops).
(To confirm the position, gently move the ASF drive gear vertically with your fingers. Make sure that
the gear is at the position where click can be felt.)
3) If the gear has passed the click position, rotate the gear in the arrow's direction to return to the correct
position.
Fixing Screws
Tension Spring
Idler Pulley
ASF Drive Gear