5-46 Phaser 6180 Color Laser Printer Service Manual
Print-Quality Troubleshooting
3 Check the Transfer Unit. Are there any 
damages on the Transfer Unit surface?
Replace the 
Transfer Unit 
(page 8-7).
Go to step 4.
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 Print Cartridge (C/M/Y/K) 
for correct installation. Reseat the 
Print Cartridge.
Does the image quality improve?
Complete. Go to step 6.
6 Check the MCU Board for correct 
installation. Reseat the MCU Board.
Does the image quality improve?
Complete. Go to step 7.
7 Check the Image Processor Board for 
correct installation. Reseat the Image 
Processor Board.
Does the image quality improve?
Complete. Go to step 8.
8 Check the HVPS for correct 
installation. Reseat the HVPS.
Does the image quality improve?
Complete. Go to step 9.
9 Replace the Print Cartridge (page 8-9).
Does the image quality improve?
Complete. Go to step 10.
10 Replace the Fuser (page 8-10).
Does the image quality improve?
Complete. Go to step 11.
11 Replace the MCU Board (page 8-87).
Does the image quality improve?
Complete. Replace the 
Image 
Processor 
Board 
(page 8-89).
Troubleshooting Procedure Table (continued)
Step Actions and Questions Yes No