Sharp AR-C200P - Manual (Page 21)

Sharp AR-C200P: Setting up • 21
5. Gently push the toner cartridge down engaging the locking pin
into the groove on the image drum.
6. Gently push the colored lever toward the rear of the machine until
it stops. This releases the toner into the image drum.
CAUTION!
The lever should go back easily. If the lever resists moving,
stop and press down on the toner cartridge to be sure it is
firmly in place before proceeding.