Fixing Print Quality Issues; Initial Print Quality Check - Konica Minolta bizhub 4020 Service Manual

4.2 Fixing print quality issues

The symptoms described in this chapter might 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 might need to install a developer (toner) cartridge.
4.2.1

Initial print quality check

Before troubleshooting specific print problems, complete the following initial print quality check:
1. The printer must be in a location that follows the recommended operating environment
specifications. See
2. Check the life status of all supplies. Any supply that is low should be replaced.
3. Load 20-lb plain letter or A4 paper. Make sure the paper guides are properly set and locked. From
the control panel, set the paper size and type to match the paper loaded in the tray.
4. Print a Menu settings page. Be sure to keep the original Menu settings page to restore the
customer's custom settings if needed.
5. Verify on the Menu settings page if the following are set to their default values:
- Print resolution: 600 dpi
- Toner darkness: 8
6. Inspect the transfer roll for damage. Replace if damaged.
7. Inspect the toner cartridge and imaging unit for damage. Replace if damaged.
8. Print the Print quality pages to see if the problem remains. Use Tray 1 to test print quality problems.
9. Print a Print quality test page, and then look for variations in the print from what is expected. Verify
if the settings under EP Setup are set to their default values. See
10. Check to ensure the correct printer driver for the installed software is being used. An incorrect
printer driver for the installed software can cause problems. Incorrect characters could print, and the
copy may not fit the page correctly.
bizhub 4020/3320 Service Manual
Operating environment.
EP
- 45 -
Defaults.