Epson AcuLaser C4000 - Page 233

Using Options
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6. Align the three screw holes on the Hard Disk Drive with the
screw holes on the circuit board. Secure it by tightening the
three screws provided.
Note:
Be careful not to damage the cable when tightening the screws.
c
Caution:
Do not remove any modules from the circuit board.
Otherwise, the printer will not work.