Canon SmartBase MPC400, Service Manual

Page: 70 / 179

3-22
SmartBase MPC600F/MPC400 Chapter 3: Assembly and Disassembly
Installing and removing the carriage encoder film
The carriage encoder film is fixed in place and held taut by the torsion spring.
When you install or remove the carriage encoder film, you have to stretch the torsion
spring. Be careful not to pull the torsion spring too much in the direction of the arrow.
Otherwise, you will not be able to properly install the carriage encoder film the next
time.
Therefore, when installing or removing the carriage encoder film, be very careful not to
pull the torsion spring too much.
Handling encoder film
(1) Be careful not to get any grease on the encoder film (carriage encoder
film and paper feed encoder film).
If grease gets on the encoder film, the film's slits will not be read correctly, resulting in
error. If grease gets on the film, use alcohol to wipe it off completely.
(2) Do not fold or scratch the encoder film.
If the film is folded and a white line is created or if a slit is scratched, replace the
encoder film.
Figure 3-20 Encoder Film