Samsung CLP-510 Series - Manual (Page 139)

M AINTAINING Y OUR P RINTER
6.14
Replacing the Imaging Unit
The life of the imaging unit is approximately 50,000 pages for
black and 12,500 pages for color. Replace the imaging unit when
the printer control panel displays “Replace Imaging Unit”.
1 Turn the printer off, then wait a few minutes for the printer
to cool.
2 Using the handle, completely open the left cover until it is at
right angles to the main frame. The toner cartridges will
disengage automatically.
C AUTION : If the left cover is not completely open, the top cover
release button will remain locked.