Brother HL-L8350CDWT - Manual (Page 153)

Routine Maintenance
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5
h Unpack the new waste toner box and install it in the machine using the blue handle. Make sure the waste
toner box is level and fits firmly into place.
i Slide the belt unit back into the machine. Make sure the belt unit is level and fits firmly into place.
j
Make sure the blue lock lever (1) is in the release position as shown in the illustration.
2
1