5-20 Phaser 3140/3155/3160 Printer Service Manual
Print-Quality Troubleshooting
Vertical Lines are Curved
When printing, vertical lines are not straight.
Initial Actions
• Cycle printer power.
• If the problem persists, refer to the following procedure.
5 Check the Transfer Roller surface for
damage.
Is the Transfer Roller surface
damaged?
Replace the
Transfer Roller
(page 8-8). If
the problem
persists, go to
step 6.
Go to step 6.
6 Replace the Fuser (page 8-11).
Does the problem persist?
Replace the
Laser Unit
(page 8-30).
Complete.
Troubleshooting Reference Table
Applicable Parts Example Print
■ Laser Unit, PL6.0.79
■ Controller Board, PL1.0.2
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 Replace the Laser Unit
Does the problem persists?
Go to step 2. Complete.
2 Replace the Controller Board
(page 8-51).
Complete.
Troubleshooting Procedure Table (Continued)
Step Actions and Questions Yes No
Vertical Lines Are Curved
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