Toshiba e-Studio 351c Operator's Manual For Basic Function page 287

2
The cartridge is moved to the appropriate position to be replaced.
3
Open the front cover.
4
Push on the latch, and then pull out the
cartridge.
Never attempt to incinerate toner cartridges. This could cause an
explosion. Do not dispose of used toner cartridges. Contact your
service representative.
5
Shake the new toner cartridge well to
loosen the toner inside.
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