Dell 2150cn User Manual page 45

NOTE:
not move easily.
6 Install the control board cover.
NOTE:
on the printer. Next, insert the lower hinge of the control board cover into the
lower slit of the printer.
7 Close the control board cover and turn the screw clockwise.
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Ensure that the memory module is firmly fixed in the slot and does
Insert the upper hinge of the control board cover into the upper slit
Installing Optional Accessories
43