Canon imageRUNNER ADVANCE 4551i Service Manual page 300

■ Procedure
1. Remove the screw [1], loosen the 4 screws [2], and remove the Controller Box Cover [3].
2. Remove the 5 connectors [1].
1x
4x
[3]
[1]
[1]
[4]
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4. Disassembly/Assembly
[2]
[2]
[3]