Sharp AR-155 Operation Manual page 26

TD CARTRIDGE REPLACEMENT
Remove the TD cartridge from the bag. Remove the protective paper. Hold the cartridge
on both sides and shake it horizontally four or five times.
Hold the tab of the protective cover and pull the tab to your side to remove the cover.
Gently insert the TD cartridge until it locks in place.
4
Close the front cover and then the side cover by pressing the round projections near
the side cover open button. The
will light up.
When closing the covers, be sure to close the front cover securely and then
close the side cover. If the covers are closed in the wrong order, the covers
may be damaged.
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4 or 5 times
indicator will go out and the ready ( ) indicator