Canon LBP 3370 User Manual page 227

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7-6 Replacing the Toner Cartridge
Hold the toner cartridge properly with the arrowed side facing
up as shown in the figure.
Install the toner cartridge.
Push the toner cartridge into the printer firmly until it touches the back of the
printer while aligning (A) on both sides of the toner cartridge with the toner
cartridge guides inside the printer.
Side View (Left)
Side View (Right)
(A)