Phaser 6180 Color Laser Printer Service Manual 5-35
Print-Quality Troubleshooting
Vertical Stripes
There are black lines along the page in the direction of the paper travel from 
the leading edge to the trailing edge.
Initial Actions
■ Check the paper transfer path.
■ Ensure there are no debris on the transfer path.
arn
ng
Ensure to wait for the Fuser to cool down before starting the procedure.
Troubleshooting Reference Table
Applicable Parts Example Print
■ Transfer Unit, PL4.1.1
■ Print Cartridge (C/M/Y/K),
PL5.1.18-21
■ Laser Unit, PL5.1.2
■ Fuser, PL5.1.10
■ MCU Board, PL9.1.20
■ Image Processor Board, PL9.1.27
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 Check the Print Cartridge (C/M/Y/K) 
for damages. Is the Print Cartridge 
damaged?
Go to step 2. Replace the 
Print Cartridge 
(page 8-9).
2 Check the Transfer Unit. Are there any 
damages on the Transfer Unit surface?
Replace the 
Transfer Unit 
(page 8-7).
Go to step 3.
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