5-28 Phaser 6180 Color Laser Printer Service Manual
Print-Quality Troubleshooting
4 Check the Transfer Unit for correct
installation. Reseat the Transfer Unit.
Does the image quality improve?
Complete. Go to step 5.
5 Check the laser beam path.
Are there any debris between the Laser
Unit and Transfer Unit?
Remove the
debris.
Go to step 6.
6 Check the wiring harness connectors
P/J12 and P/J151 between the Laser
Unit and the MCU Board.
Are the connectors securely
connected?
Go to step 7. Reconnect the
connectors.
Go to step 7.
7 Check the Print Cartridge (C/M/Y/K)
for correct installation. Reseat the
Print Cartridge.
Does the image quality improve?
Complete. Go to step 8.
8 Perform Yellow/Magenta/Cyan/Black
Toner Motor test (Yellow, page 4-47;
Magenta, page 4-48; Cyan, page 4-49;
Black, page 4-50): Service Mode >
Engine Diag > Motor Test > Toner
Motor.
Does the Dispenser rotate properly?
Go to step 9. Replace the
MCU Board
(page 8-87).
If not, replace
the Dispenser
(page 8-56).
9 Check the MCU Board for correct
installation. Reseat the MCU Board.
Does the image quality improve?
Complete. Go to step 10.
10 Check the Image Processor Board for
correct installation. Reseat the Image
Processor Board.
Does the image quality improve?
Complete. Go to step 11.
11 Check the HVPS for correct
installation. Reseat the HVPS.
Does the image quality improve?
Complete. Go to step 12.
12 Replace the Laser Unit (page 8-50).
Does the image quality improve?
Complete. Replace the
Image
Processor
Board
(page 8-89).
Troubleshooting Procedure Table (continued)
Step Actions and Questions Yes No
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