Canon Perfect Binder A1 Troubleshooting Manual page 74

<For Perfect Binder-D1>
9) Remove the sensors, cables, etc., from the Dust Buffer Unit, and install them to the new type Dust Buffer Unit.
CAUTION:
The cables in the Dust Buffer Unit are different between Perfect Binder-A1/B1/C1 and Perfect Binder-D1. Be careful of how
to install the cables.
10) Install the parts by reversing the procedure from step 8).
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