Canon PIXMA MX870 Service Manual page 37

4) Remove the speaker. (2 screws)
5) Remove the printer unit. (6 screws)
<While being cautious not to damage the arm that connects to the front door, lift the printer unit.>
When the paper separation slope is removed as well as the printer unit from the bottom case, ink absorbers can be
replaced. Some of the ink absorbers are under the paper separation slope.
When the ink absorbers are replaced, confirm that the replaced new absorbers fit in place securely, and they do
not lift.
After replacement of the ink absorbers, reset the ink absorber counter value to zero in the service mode.
4-2. Service Mode, for details.]
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