Canon iR C6800 Series Service Manual page 114

Chapter 2
11) Fix the plate (key switch) [1] in place using the 2 screws [2] you removed in step 7).
[2] [1]
[2]
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12) Mount the right cover (upper rear) you removed in step 5).
13) Connect the power plug, and turn on the main power switch.
14) Start service mode, and make the following selections: COPIER>FUNCTION>INSTALL>KEY: then, enter '1'.
15) Turn off and then on the main power switch.
16) Check to see that a message has appeared asking for the control key.
17) Insert the control key, and check to make sure that the machine is ready to make copies.
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