Diagnostic information 2-33
4506-1xx
Model E120n
To print the print quality test pages:
1. Enter the Configuration menu.
a. Turn off the printer.
b. Open the front access cover.
c. Turn on the printer while pressing and holding .
d. When the light stays on, close the cover.
e. Wait (approximately 10 seconds) until the printer drive activates.
2. Slowly press and release three times until the and lights come on.
3. Press and hold until all the lights flash to initiate printing the quality test pages.
Three pages print to help you evaluate print quality. The first page has various fonts, the second page is
gray, and the third page is black. Once the paper exits into the output bin, the printer returns to the home
state (four top lights on).
Use the test pages to isolate problems such as light or toner streaks. See “POST symptom table” on
page 2-22 for solutions to these problems.
To exit the Configuration menu, turn the printer off.
Blank page
FRU Action
Toner cartridge (not a
FRU)
Remove the toner cartridge, and gently shake it to evenly distribute the toner.
Check the cartridge for damage or contamination. Straighten or clean it as
necessary.
Try a different toner cartridge.
Printhead
LVPS/HVPS
Controller card
Blank pages can be caused by a defective printhead assembly, LVPS/HVPS, or
controller card.
Note: Printhead errors typically result in printer service errors. A blocked or
absent laser beam will result in a blank page. Check for blockage of the beam or
dust on the lens.
If these steps fail, replace the LVPS/HVPS, controller, or printhead in that order.
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