Sharp MX-B707F User Manual page 180

Troubleshooting
Action
a
Check if the printer is using a genuine and supported toner
cartridge.
Note: If the toner cartridge is not supported, then install a
supported one.
b
Print the document.
Do vertical dark bands appear on prints?
Vertical dark lines
Note: Before solving the problem, print the Print Quality Test Pages. From the control panel, navigate to
Settings > Troubleshooting > Print Quality Test Pages.
Yes No
Contact your dealer. The problem is
solved.
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