5-46 Phaser 6180MFP Multifunction Printer Service Manual
Print-Quality Troubleshooting
Defects in One Color (C, M, Y, or K)
Only one color (Cyan, Magenta, Yellow, or Black) is too light on the printed 
image.
Initial Actions
■ Check the paper transfer path.
■ Ensure there are no debris on the transfer path
Troubleshooting Reference Table
Applicable Parts Example Print
■ Laser Unit, PL5.1.12
■ Print Cartridge (C/M/Y/K)
PL5.1.17-20
■ HVPS, PL5.2.15
Troubleshooting Procedure Table 
Step Actions and Questions Yes No
1 1.Perform Test Print (Cyan 20%, 
Magenta 20%, Yellow 20%, or Black 
20%): Service Mode > Printer Diag 
> Test Print.
2.Does the error still occur when 
printing?
Go to step 2. Complete.
2 1.Check the Print Cartridge (C/M/Y/K).
2.Is there a faint toner?
Go to step 3. Complete.
3 1.Check the Print Cartridge (C/M/Y/K) 
for damages.
2.Is the Print Cartridge damaged?
Replace the 
Print Cartridge
(page 8-11).
Go to step 4.
Light Print (One Color)