5-18 Phaser 6121MFP Service Manual
Print-Quality Troubleshooting
7 Check the connectors and
terminal contacts of the
Laser Unit.
Are the connectors and
contact terminals
connected properly?
Go to step 8. Reseat the
connectors and clean
the terminal contacts.
If the problem
persists, go to step 8.
8 Is the Transfer Roller dirty
or damaged?
Replace the roller
(page 8-56). If the
problem persists, go
to step 9.
Go to step 9.
9 Check the paper path.
Is there a foreign object
or obstruction in the
path?
Remove the object
and reprint the test
page. If the problem
persists, go to step
10.
Go to step 10.
10 Inspect the Fuser.
Is the fusing entrance
guide plate dirty or
scratched?
Clean the guide plate
and reprint the test
sheet. If the problem
persists, replace the
Fuser (page 8-9) and
go to step 11.
Go to step 11.
11 Has the problem been
eliminated?
Complete. Replace the Power
Supply (page 8-72).
Troubleshooting Procedure Table (continued)
Step Actions and Questions Yes No
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