Canon Satera LBP3900 User Manual page 83

IMPORTANT
Do not hold the toner cartridge in a manner that is not directed in this procedure.
9
Hold the toner cartridge with both hands and install it into the
printer.
Align (A) of the toner cartridge with the toner cartridge guides (B), then insert the
cartridge until it stops.
(A)
(B)
(B)
(A)
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