Samsung ML-1651N - Manual (Page 90)

3 Your printer automatically picks up a sheet of paper from the
paper tray and prints out a cleaning sheet with the dust or toner
particles on it.
6.5 M
AINTAINING
Y
OUR
P
RINTER
5 Reinsert the toner cartridge and close the top cover. Then, turn
the printer on.
Cleaning the Printer
Printing a cleaning
sheet
Printing a cleaning sheet cleans the drum inside the toner
cartridge. Use this process if you are experiencing blurred,
faded or smeared printouts. This process will produce a page
with toner debris, which should be discarded.
1 Make sure the printer is turned on and in the ready state and
that there is paper loaded in the paper tray.
2 Press and hold Demo on the control panel for about 10 seconds
until all control panel lights remain steadily lit, then release.
4 Locate the long strip of glass (LSU) inside the top of the
cartridge compartment, and gently swab the glass to see if dirt
turns the white cottom black.