Canon Perfect Binder A1 Troubleshooting Manual page 72

5-3) Pull out the Trimming Assembly.
- Screw x4
CAUTION:
Before pulling out the Trimming Assembly, be sure to check that the Trimming Blade is at the REAR side.
If the Trimming Blade is at the front side, move the Trimming Blade to the rear side by following the Service Manual.
6) Open the Controller Mount.
- Connector x13
- Flexible cable x2
- Flexible cable retainer x2
- Screw x2
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