Oki B4545 MFP - Manual (Page 126)

127
Maintenance
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4 - Separate the drum cartridge from the toner cartridge.
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5 - Remove the new toner cartridge from its box, holding it firmly in both
hands.
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6 - Shake the toner cartridge alternately in the directions shown by the
arrows in the illustration below.
Drum cartridge
Toner cartridge