Canon imageRUNNER ADVANCE 8500 series Troubleshooting Manual page 10

A) Replacement of developing assembly (FM3-7384-020)
Refer to the service manual and replace with a new type of developing assembly (FM3-7384-020).
B) Replacement of stirring rod (FL3-2163-010)
B-1) Refer to service manual to pull out the developing assembly.
B-2) Remove 4 pcs of screws and remove the lid.
[Reference] To remove the lid, displace the boss [a] from a hole, and then slide the lid towards direction [b].
B-3) Use a vacuum cleaner to remove all toner left in the developing assembly.
B-4) Remove 3pcs of screws, then remove roller bias plate [1] from the boss [a] and remove a metal sheet [2] from the side of
the developing assembly.
[Caution] When you install a metal sheet, be sure the roller bias plate fits into the boss properly.
[A] Roller bias plate in a correct position of boss, [B] Roller bias plate not fitting properly.
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