Canon imagePRESS C10000VPSeries Troubleshooting Manual page 204

C) When loosening the yellow screws in the slider
When loosening the yellow screws in the slider, place the primary corona assembly sideways as in the photo [A] and loosen the
screws. The leaf spring of the shutter may deform when placing the unit as in the photo [B] and loosening the screws.
D) When removing and installing the shutter
When removing the shutter hook [1] one by one as shown in the photo [A] to remove the shutter, the leaf spring on back of the
shutter sheet may deform when opening the shutter hook wide while the other shutter hook is intact. In addition, when installing
the shutter, holding the shutter hook [1] with one hand as in the photo [B] trying to install the both ends at once may cause a
deformation of the leaf spring on back of the shutter sheet.
When removing the shutter from the shutter slider [1], remove it while pressing the hook claws [2] of the shutter with both hands.
Also, when installing it, insert the hooks [2] to the shutter slider [1] while holding the hook claws [2] of the shutter with both hands.
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