Phaser 6180 Color Laser Printer Service Manual 5-57
Print-Quality Troubleshooting
3 1. Perform Test Print procedure (Cyan 
20%, Magenta 20%, Yellow 20%): 
Service Mode > Test Print.
2. Adjust the color registration in the 
Control Panel: Menu > Admin Menu 
> Maintenance Mode > Adjust 
ColorRegi.
3. Does the image quality improve?
Complete. Go to step 4.
4 Check the parameter value. Did the 
client change the value of the 
registration parameter?
Reset the value 
to default.
Go to step 5.
5 Check the Front Cover Latch. Open and 
close the Front Cover.
Does the image quality improve?
Complete. Go to step 6.
6 Check the Transfer Unit for correct 
installation. Reseat the Transfer Unit.
Does the image quality improve?
Complete. 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 the Regi Clutch test 
(page 4-51): Service Mode > Engine 
Diag > Motor Test > Regi Clutch.
Does the Registration Clutch operate 
properly?
Replace the 
MCU Board 
(page 8-87).
Replace the 
Feeder Unit 
(page 8-43).
Troubleshooting Procedure Table (continued)
Step Actions and Questions Yes No