Brother HL-3140CW User Manual page 138

Routine Maintenance
g
Close the top cover of the machine.
When you replace the belt unit with a new one, you must reset the belt unit counter by completing the
following steps:
a
Press a while holding down Go on the machine's control panel.
b
Press a or b to display Belt Unit. Press OK.
c
Press a for Reset to reset the belt unit counter.
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