5-22 Phaser 6128MFP Service Manual
Print-Quality Troubleshooting
Horizontal Stripes
There are black lines running parallel with the leading edge of the print,
perpendicular to the direction of the paper travel.
Initial Actions
• Check the paper transfer path.
• Ensure there are no debris on the transfer path.
Allow the Fuser to cool before starting the procedure.
Troubleshooting Reference Table
Applicable Notes Example Print
■ Laser Unit Kit (PL4.1.99)
■ Imaging Unit (PL4.1.21)
■ Toner Cartridge K (PL5.1.21)
■ Toner Cartridge C (PL5.1.22)
■ Toner Cartridge M (PL5.1.23)
■ Toner Cartridge Y (PL5.1.24)
■ Fuser (PL6.1.1)
■ 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 Run the Contamination Check test
print: Service Mode > Test Print >
Contamination Chk
Compare any horizontal dropout
bands with the Pitch Chart
(page 5-51).
Do any of the horizontal bands
match the chart?
Replace the
corresponding
parts.
Go to step 2.
2 Check the Transfer Belt high-voltage
connections..
Are the contacts on the Transfer Belt
and springs damaged or dirty?
Clean or
replace the
Transfer Belt
contacts or
spring(s).
Go to step 3.