Epson Aculaser C4000 Setup Manual page 17

5. Turn the toner cartridge knobs to the locked position.
Note:
Hold the knobs with both hands and turn them until they click.
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Caution:
Be sure to turn the knob all the way to the locked position.
Otherwise, you may have toner problems or leakage.
6. Remove the protective tape.
Assembling the Printer
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