Olivetti d-Color MF920, Service Manual

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Service Manual
Print quality service check
Note: This symptom may require replacement of one or more CRUs (Customer Replaceable Units) designated
as supplies or maintenance items, which are the responsibility of the customer. With the customer's permission,
you may need to install a developer (toner) cartridge or photo conductor unit.
Service tip
Before troubleshooting any print quality problems, do the following:
1.
Print a menu settings page, and check the life status of all supplies. Any supplies that are low should be
replaced.
To print a menu settings page:
a.
press Menu ( ) on the operator panel.
b.
Select Reports from the Admin Menu, and press Select ( ).
c.
Select Menu Settings , and press Select ( ).
Note: Be sure and keep the original menu page to restore the customer's custom settings if needed.
2.
On the menu page, make sure the following is set to the default level:
–
Color Correction: Set to Auto.
–
Print Resolution: Set to 1200 dpi (print quality problems should be checked at different resolution
settings).
–
Toner Darkness: Set to 4 (default).
–
Color Saver: Set to OFF.
–
RGB Brightness, RGB Contrast, RGB Saturation: Set to 0.
–
Color Balance: Select Reset Defaults to zero out all colors.
–
Check the paper type, texture and weight settings against what is loaded in the printer.
Once the printer has been restored to its default levels, do the following:
1.
Inspect the imaging unit for damage, including the developers and toner cartridges. Replace if damaged.
2.
If paper other than 20lb plain letter/A4 paper is being used, load 20lb plain letter/A4.
3.
Print the Print Quality pages to see if the problem remains. Look for variations in the print from what is
expected.
To print the print Quality pages
a.
Enter Diagnostics (turn off the printer, press and hold Left ( ) and Select ( ), turn on the printer
and release when the installed memory and processor speed displays).
b.
Select PRINT TESTS , and press Select ( ).
c.
Select Print Quality Pgs , and press Select ( ).
The message
Printing Quality Test Pages
is displayed.
An incorrect printer driver for the installed software can cause problems. Incorrect characters could print, and
the copy may not fit the page correctly.
Measure all voltages from the connector to the printer ground.
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