NEC 870 - SuperScript B/W Laser Printer Online User's Manual page 114

Chapter 9: Troubleshooting
Random Deletions or Light Areas
• The Toner module may be damaged and need
replacing.
114
Black or White Vertical Bands
on Page
• The Toner module or Photoconductor module
may be defective. Remove the modules and
replace if necessary.
Black Page
• The Toner module may be defective. Remove
the Toner module and check it for damage.
Replace the Toner module if necessary (see
page 98 of this user's guide).