Canon imagePRESS 1135 Series Troubleshooting Manual page 126

<Work procedure 2-2>
21) Remove the Duplex Feed Unit from the hole of the hook in the direction of the arrow.
22) Remove the 2 guide wires to remove the Duplex Feed Unit.
- 2 stepped screws
23) If abnormality is found in the Feed Rollers in this unit, replace the faulty part.
24) Install the removed parts in reverse order.
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