5-8 Phaser 6128MFP Service Manual
Print-Quality Troubleshooting
Light or Undertone Print
The overall image density is too light in all colors.
Initial Actions
• Check the Imaging Unit life counter.
• Set the print mode to Enhanced.
• Check for obstructions or debris in the beam path between the Laser and the
Imaging Units.
• Check the media settings at the Control Panel.
Troubleshooting Reference Table
Applicable Parts Example Print
■ Laser Unit kit(PL4.1.99)
■ Imaging Unit (PL4.1.21)
■ Dispense Assy (PL5.1.3)
■ Toner Cartridge K (PL5.1.21)
■ Toner Cartridge C (PL5.1.22)
■ Toner Cartridge M (PL5.1.23)
■ Toner Cartridge Y (PL5.1.24)
■ Transfer Belt (PL6.1.7)
■ IP Board (PL10.6.6)
■ MCU Board (PL10.7.7)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 Check the toner type.
Are the cartridges genuine Xerox?
Go to step 2. Replace with
Xerox toner.
2 Check the media condition.
Is the media the recommended
type?
Go to step 4. Replace the
media with a
recommended
one, then go to
step 3.
3 Is the image printed correctly? Complete Go to step 4.
4 Check the print mode.
Is the Standard Mode selected?
Select
Enhanced
Mode, then go
to step 5.
Go to step 6.
5 Is the image printed correctly? Complete Go to step6.
Light or Undertone Print