Oki 391 - Manual (Page 80)

80 Microline 390/391 Turbo
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Printer Cleaning
You should clean the printer every six months (or after about
300 hours of operation).
! Never use solvents or strong detergents on the cabinet:
they could cause damage.
1 Turn off the printer. Then, use the platen knob to back the
paper out of the printer.
2 Open the access cover. Remove the pull-up roller
assembly.
32T-04Up.eps
3 Use a clean, dry cloth to dust around the carriage shaft and
platen. Remove any loose bits of paper.
4 Install the pull-up roller assembly. Close the access cover.
32T-04Dn.eps