Canon Perfect Binder A1 Troubleshooting Manual page 248

17) Remove the 1 screw [1] from the removed cutter drive assembly, and remove the reinforcement bracket [2]. If the cutter drive
assembly has no reinforcement bracket, go to the next step.
18) Attach the reinforcement bracket that was removed in the step 17) to the new cutter drive assembly inside the cutter drive
assembly. If the cutter drive assembly has no reinforcement bracket, attach the reinforcement bracket inside the cutter drive
assembly with the 1 flanged pan head screw (M4x8).
19) Measure the distance of the stop position [a] of the press ball screw [1] of the cutter drive assembly removed in the step 16)
with a scale [2].
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