Canon MP970 Service Manual page 21

5) Remove the scanner unit.
<Disconnect the scanner motor cable connector from the logic board. (Be cautious of the rib of the main case.)>
<Disengage the scanner lock arm from the scanner unit.>
<While rotating the scanner unit slightly toward the outside, release the scanner lock arm from the scanner unit.>
6) Remove the main case unit.
<Release the 4 claws, and pull up the main case (no screws).>
<Release the the claw on the right front of the machine (on the upper side of the card board) by shifting the claw
itself to the right using a pair of tweezers.>
Photo up: Scanner unit
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