Carriage Unit Removal - Canon MP640 Service Manual

(7) Carriage unit removal

1) On the main chassis, mark the positions of the screws that fix the carriage rail to the main chassis (3 points for each
screw: the left, right, and center).
2) Remove the timing slit film. Be cautious to keep it free from any grease or damage.
3) Pass the head of a flat-blade screwdriver through the hole of the main chassis, and press the carriage belt to release it
from the pulley. Be cautious to keep it free from any grease.
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