Canon imagePRESS 1135 Series Service Manual page 476

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Parts Replacement and Cleaning > Periodic Replacing Parts, Durable Parts, Cleaning Parts > Cleaning procedure of filters
5) Remove the screw.
6) Move the fixing toner filter cover downward, and remove
it to the front side.
Fixing toner filter cover
9) Remove the screw
10) Open the right side of the primary charging toner filter cover to the front side, and remove it.
Primary charging toner filter cover
4 Parts Replacement and Cleaning > Periodic Replacing Parts, Durable Parts, Cleaning Parts > Cleaning procedure of filters
7) Insert a finger to the notch in the upper and lower of the host
machine rear cover, hold the fixing toner filter, and remove it
to the front side.
F-4-437
F-4-440
8) Insert the finger to the notch in the upper and lower of the host
machine cover, hold the 2 fixing ozone filters, and remove
them to the front side.
Fixing toner filter
F-4-438
11) Remove the primary charging toner filter.
Fixing ozone filters
F-4-439
Primary charging
toner filter
F-4-441
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