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Repeating Defects Spacing
Component Defect Spacing Defect Location
Imaging Drum 94.3 mm Imaging Unit
Developer Roller 30.2 mm Imaging Unit
Charge Roller 29.9 mm Imaging Unit
Supply Roller 43.1 mm Imaging Unit
Fuser Belt 94.2 mm Fuser
Heat Roller 85.4 mm Fuser
Transfer Roller 37.7 mm Transfer Unit
3.4 Print-Quality Troubleshooting
Light Prints in All Colors
The overall image density is too light in all colors. If the image is light in only one color,
see "Light Print in Only One Color".
Initial Actions to Perform
■ Perform Initial Actions from Maintenance Procedures in Chapter 1.
■ Verify the media used is supported by this printer.
■ Verify the media settings are correct at the Control Panel.
■ Print the ID Check Pattern (Setting - Reports – Print – ID Check Pattern) and
Demo page (Reports – Information – Demo Page) to see if it is an application problem.
■ Perform isolation Test Prints (Section 2.8.3).
■ Run the Density Adjustment Test in Section 2.8.5.
Areas of the Printer that Apply
■ Imaging Unit
■ LED Head
■ Transfer Unit
■ HVPS
■ PU Board
Troubleshooting Steps Resolution
1. Verify all packaging material has been removed form the toner cartridges
Yes – Go to Step 2
No - Remove packing material
2. Remove the Imaging Units and the Transfer Unit and check for toner contamination on the
high voltage contacts. Are the contacts contaminated?
Yes – Clean the contacts
No - Go to Step 3
3. Are the LED Heads dirty? Clean the heads with a clean, lint-free cloth. Did this correct the
problem?
Yes – Complete
No - Go to Step 4
4. Are the wiring harnesses on the LED Heads undamaged, properly routed and seated?
Yes – Repair / Replace Harnesses
No - Go to Step 5
5. Inspect the high-voltage wiring harness. Reseat the wiring Harness. Did this correct the
problem?
Yes – Complete
No - Replace in the following order:
Transfer Unit / Imaging Unit / HVPS /
CUPU Board
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