Canon Pro9000 Mark II Service Manual page 33

(5) ASF unit removal
1) Disconnect the PE sensor connector, carriage cable, and front feed PE sensor cable from the ASF.
2) Disengage the two cores.
For the cables indicated by the blue circle in the photo, only six of them pass through the core.
Keep those cables connected to the ASF, and just leave them (with the core) away from the ASF.
For the cables that pass through the other core, disconnect the cables (connector) and the core
from the ASF.
3) Remove the ASF motor connector.
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