Canon Puncher Unit-P1 Service Manual page 60

Chapter 4
5) Press SW603 on the punch controller PCB. The
number of punch holes is registered to the punch
controller PCB each time the switch is pressed.
Registration is complete if LED601 and 602 on the
punch controller PCB flashes alternately.
6) Press SW602 or 603 on the punch controller PCB
to end the adjustment mode and set all bits of SW601
to OFF.
7) Turn off the power of the host machine.
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