Canon W6400 Series Service Manual page 103

Make sure to keep the carriage unit level when removing it to prevent the protective mylar from being removed. Removal of the protective mylar will
damage the roller due to contact with the carriage unit rollers and result in noise, thus affecting print quality.
b) Mounting the carriage belt
To mount the carriage belt, align the all notches of the carriage belt with the belt stopper.
c) Procedure after replacing the carriage unit/registration sensor
The optical axis is compensated to adjust the image printing position at factory shipment because there are fluctuations among machines in the distance
between the registration sensor (in the carriage unit) and nozzle (in the print head). Therefore, adjustment must be performed when replacing or
disassembling/assembling the carriage unit or registration sensor.
Enter the service mode under the following condition:
Service mode: SERVICE MODE > ADJUST > PRINT PATTERN > OPTICAL AXIS
Head height: LOW position
Media type: Photo Glossy Paper
Media size: 24 inch
d) Removing the head holder
1) Drain the ink. For details, refer to DISASSEMBLY/REASSEMBLY > Points to Note on Disassembly and Reassembly > Draining the Ink.
2) Turn off the power, and then move the carriage over the platen. For details, refer to DISASSEMBLY/REASSEMBLY > Points to Note on Disassembly
and Reassembly >Opening the Caps and Moving the Wiper Unit.
3) Remove the shaft cleaner, tube holder cover and tube holder.
4) Remove the printhead.
Protective mylar
Idler roller mount
Feed roller plate
F-4-25
Belt stopper
Carriage belt
F-4-26
Carriage unit
Chapter 4
4-13