NEC 870 - SuperScript B/W Laser Printer Online User's Manual page 102

Chapter 8: Maintaining Your Printer
5. Using a soft cloth, wipe the Paper
transport roller.
6. Reinstall the Toner and Photoconductor
modules.
Note: Make sure the blue and green
markings on the imaging modules
line up with the blue and green
markings on the inside of the printer.
102
7. Carefully close the Top cover of the printer.